<p>Today's <strong>Image of the Day</strong> from NASA Earth Observatory features the Corbassière glacier, a high-altitude glacier in Switzerland. The glacier originates on the northern slope of the Grand Combin, which is one of the highest peaks in the Pennine Alps.</p>



<p>Collectively, the <a href="https://www.earth.com/news/alpine-glaciers-will-lose-half-of-their-volume-by-2050/" target="_blank" rel="noreferrer noopener">alpine glaciers</a> of Switzerland have lost more than half of their volume since the 1930s.</p>



<h2 class="wp-block-heading" id="h-natural-archives-of-past-climate">Natural archives of past climate </h2>



<p>"Glaciers are natural archives of past climate. In their frozen layers lies evidence of Earth’s changing temperature and atmospheric composition. But as the climate warms, some of the longest records of our changing planet are melting away," said <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.</p>



<p>"In just over two decades, Corbassière has shrunk in area and surface mass. The glacier was darker in 2023 due to lack of snow, and the glacier’s tongue had retreated."</p>



<h2 class="wp-block-heading" id="h-ice-cores-from-the-corbassiere-glacier">Ice cores from the Corbassière glacier</h2>



<p>To reconstruct past concentrations of atmospheric <a href="https://www.earth.com/news/how-do-aerosols-impact-the-climate/" target="_blank" rel="noreferrer noopener">aerosols</a>, a team of scientists analyzed ice cores that were collected from the Corbassière glacier in 2018 and 2020.&nbsp;</p>



<p>Aerosols are tiny airborne particles that are deposited in the ice. "Such information from glaciers around the world can provide clues about past environmental conditions thousands of years ago," noted NASA.</p>



<p>"Ice cores contain ammonium, nitrate, and sulfate ions - signatures of aerosols lacing the snow that’s deposited on glaciers year after year. Ion concentrations are lower in winter than in summer because less polluted air can rise from the valley when the air is cold."</p>



<p>When the researchers analyzed the ice core from 2018, they found seasonal fluctuations in the amount of ion deposits - which is what they expected to find.&nbsp;</p>



<p>"But when we went to core the glacier in 2020, we noticed melting on the surface right away,” said Margit Schwikowski, an environmental chemist at <a href="https://www.psi.ch/en" target="_blank" rel="noreferrer noopener">Paul Scherrer Institute</a> in Switzerland.&nbsp;</p>



<h2 class="wp-block-heading" id="h-rapid-surface-melting-on-corbassiere-glacier">Rapid surface melting on Corbassière glacier</h2>



<p>The experts determined that melting on the glacier's surface likely penetrated the glacier layers below and carried away the aerosol ions. </p>



<p>"This melting rendered the core unusable in the team’s research, and other attempts to core the glacier had the same result. The valuable information stored in the ice was destroyed," explained NASA.</p>



<p>Schwikowski has joined a team of other experts in an effort to preserve cores from the last remaining glaciers. Led by the <a href="https://www.ice-memory.org/" target="_blank" rel="noreferrer noopener">Ice Memory Foundation</a>, the goal of the project is to obtain ice cores from 20 endangered glaciers around the world in 20 years and collect them in a global <a href="https://www.earth.com/news/antarcticas-ice-has-a-history-of-rapid-and-unexpected-changes/" target="_blank" rel="noreferrer noopener">climate archive</a>.</p>



<p>“Glaciers are retreating worldwide, and we may find similar issues at other sites,” said Schwikowski. She added that even at the highest altitudes in the Alps, "glaciers are on the verge of becoming unsuitable as natural paleo-archives."</p>



<h2 class="wp-block-heading" id="h-features-of-the-corbassiere-glacier">Features of the Corbassière Glacier</h2>



<p>The Corbassière Glacier is a captivating natural feature located in the Swiss Alps, part of the canton of Valais. </p>



<p>The glacier stretches over approximately 9 kilometers, making it one of the significant glaciers in the region. It originates from the Grand Combin, an imposing mountain massif that reaches heights of over 4,300 meters, contributing greatly to the glacier's nourishment through snow and ice accumulation.</p>



<p>A distinct feature of the Corbassière Glacier is its accessibility and the dramatic scenery it offers, which attracts many hikers and nature enthusiasts. </p>



<p>One of the most notable attractions near the <a href="https://www.earth.com/news/doomsday-glacier-seems-to-have-lost-its-ability-to-recover/" target="_blank" rel="noreferrer noopener">glacier</a> is the Corbassière footbridge, a 210-meter long suspension bridge that provides stunning views of the glacier and the surrounding peaks. </p>



<p>This bridge not only enhances the experience for visitors but also serves as a crucial observation point for scientists studying glacier dynamics and the effects of climate change.</p>



<h2 class="wp-block-heading">The Swiss Alps&nbsp;</h2>



<p>The Swiss <a href="https://www.earth.com/news/snow-cover-in-the-alps-could-soon-be-cut-in-half/" target="_blank" rel="noreferrer noopener">Alps</a> are a majestic and expansive mountain range that stretches across the southern part of Switzerland, forming a part of the greater Alpine region that spreads across several countries in Europe.&nbsp;</p>



<p>Renowned for their stunning beauty and formidable peaks, the Swiss Alps are not just a geographical landmark but also a cultural symbol of Switzerland, epitomizing its identity as a nation of scenic landscapes and outdoor adventure.</p>



<p>The region is famous for its dramatic scenery, including towering mountains, pristine lakes, and picturesque valleys. Among these peaks are some of the highest in Europe, such as the Dufourspitze, part of the Monte Rosa massif, which is the highest point in Switzerland. </p>



<p>The Matterhorn, perhaps the most iconic of all Swiss mountains, is celebrated for its unique, pyramid-like shape and is a magnet for climbers and tourists alike.</p>



<p>Image Credit: NASA Earth Observatory</p>



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The Corbassière glacier in the Swiss Alps

Today's Image of the Day from NASA Earth Observatory features...

<p>Today's <strong>Image of the Day</strong> from NASA Earth Observatory features thick haze over Thailand during the fire season. The photograph was captured on March 16, 2024 by the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite.</p>



<h2 class="wp-block-heading" id="h-waves-of-smoke-and-haze">Waves of smoke and haze</h2>



<p>"Each year in January and February, satellites begin to detect waves of smoke and fire in Southeast Asia, particularly in highland forests in Cambodia, Laos, Myanmar, and Thailand. <a href="https://www.earth.com/image/intense-fire-season-in-mexico-is-part-of-a-worldwide-trend/" target="_blank" rel="noreferrer noopener">Fire activity</a> continues to increase through March and April, reaches a peak during the height of the dry season, and then fades in May with the start of the rainy season," noted <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA</a>.</p>



<p>"Individual fires are usually small and short-lived. But they are often so numerous that smoke, along with air pollution from rural and urban areas, mixes to produce thick layers of haze that blanket the landscape." </p>



<p>According to NASA, the haze contains mixtures of small airborne particles called aerosols and gaseous pollutants such as nitrogen dioxide, sulfur dioxide, carbon monoxide, and ozone that degrade air quality.</p>



<h2 class="wp-block-heading" id="h-haze-in-thailand-nbsp">Haze in Thailand&nbsp;</h2>



<p>An international field campaign - the Airborne and Satellite Investigation of Asian Air Quality (ASIA-AQ) - was launched to investigate the haze in Thailand.</p>



<p>"During the last two weeks of March 2024, NASA’s DC-8 and Gulfstream III aircraft flew several flights over Chiang Mai, Bangkok, and rural areas surrounding the cities to sample air quality with several sensors. At the same time, satellites observed the haze from above," said NASA.</p>



<p>James Crawford, ASIA-AQ’s principal investigator, said the team is collaborating closely with national and local government entities in Thailand.</p>



<p>“The goal is to take as many simultaneous measurements of pollutants as possible from the ground, air, and space,” said Crawford. The team will use the data to gain a better understanding of how the haze forms, evolves chemically over time, and moves throughout the region.</p>



<h2 class="wp-block-heading" id="h-haze-and-public-health-in-thailand">Haze and public health in Thailand </h2>



<p>According to media reports, nearly 200,000 people have been hospitalized this year due to air quality in the region, with over 1.3 million people falling ill since January.&nbsp;</p>



<h3 class="wp-block-heading" id="h-causes-of-the-haze">Causes of the haze</h3>



<p>The root causes of the haze include agricultural burning, particularly of corn fields, as part of slash-and-burn practices to prepare land for the next planting cycle. This is exacerbated by the dry season when there's little rain to wash the pollutants away. </p>



<p>The situation is worsened by industrial emissions and vehicle fumes, particularly in urban areas like Bangkok​.</p>



<h3 class="wp-block-heading" id="h-sustainable-solutions-are-needed">Sustainable solutions are needed</h3>



<p>Efforts to address the crisis have been complex, involving local and transboundary issues. Much of the agricultural burning occurs not only within Thailand but also in neighboring countries like Myanmar and Laos, contributing to the transboundary nature of the haze. </p>



<p>Activists and local communities have called for sustainable solutions that do not exacerbate the poverty of smallholder farmers, emphasizing the need for affordable and realistic alternatives to burning​.</p>



<h3 class="wp-block-heading" id="h-mitigation-measures-nbsp">Mitigation measures&nbsp;</h3>



<p>The Thai government has implemented a no-burning rule until the end of April to combat wildfires and haze, but enforcement and effectiveness remain challenges​​. </p>



<p>Some measures taken to mitigate the immediate effects of pollution in urban areas include spraying water and seeding clouds to encourage rain, although these have had limited success​​.</p>



<p>This ongoing environmental crisis has sparked widespread concern among citizens, who are increasingly using public interest litigation to hold companies and the government accountable for environmental commitments. </p>



<p>With recent political changes, there is hope that the new administration will take more decisive action against the haze, possibly through more stringent regulations and international cooperation​​.</p>



<h2 class="wp-block-heading" id="h-health-impacts-of-haze">Health impacts of haze</h2>



<p>Haze poses several health hazards for those exposed to it, particularly when it contains fine particulate matter (PM2.5). Here are some of the main health risks associated with exposure to haze:</p>



<h3 class="wp-block-heading" id="h-respiratory-problems">Respiratory problems</h3>



<p>Haze can aggravate conditions such as asthma, bronchitis, and other chronic obstructive pulmonary diseases (COPD). The fine <a href="https://www.earth.com/news/heatwaves-and-air-pollution-may-double-fatal-heart-attack-risk/">particles</a> can penetrate deep into the lungs, causing inflammation and reducing lung function.</p>



<h3 class="wp-block-heading" id="h-cardiovascular-issues-and-haze">Cardiovascular issues and haze</h3>



<p>Exposure to fine particulate matter can also affect the cardiovascular system, leading to increased risk of heart attacks, strokes, and high blood pressure. Particles can affect blood vessel function and promote the formation of blood clots.</p>



<h3 class="wp-block-heading" id="h-eye-irritation">Eye irritation</h3>



<p>Haze can cause eye irritation, leading to conditions such as conjunctivitis (pink eye) or exacerbated symptoms in people with existing eye conditions.</p>



<h3 class="wp-block-heading" id="h-skin-problems">Skin problems</h3>



<p>For some people, exposure to <a href="https://www.earth.com/news/air-pollution-will-increase-dramatically-in-a-hotter-climate/">polluted air</a> can cause skin irritation or exacerbate skin conditions like eczema or psoriasis.</p>



<h3 class="wp-block-heading" id="h-reduced-immune-function">Reduced immune function</h3>



<p>There is evidence to suggest that prolonged exposure to polluted air can weaken the immune system, making individuals more susceptible to infections.</p>



<h3 class="wp-block-heading" id="h-impact-on-mental-health">Impact on mental health</h3>



<p>There are growing concerns about the impact of air pollution on <a href="https://www.earth.com/news/air-pollution-linked-to-multiple-chronic-health-conditions/">mental health</a>, with studies suggesting a link between exposure to polluted air and an increased risk of depression and anxiety.</p>



<h3 class="wp-block-heading" id="h-pregnant-women-and-children">Pregnant women and children</h3>



<p>Pregnant women, children, and the elderly are particularly vulnerable to the effects of haze. There may be increased risks of preterm birth and low birth weight in babies, and children may experience delayed development and reduced lung function.</p>



<p>The health impacts of haze can be mitigated by staying indoors on days when <a href="https://www.earth.com/news/twenty-years-of-air-quality-improvement-erased-by-wildfires/" target="_blank" rel="noreferrer noopener">air quality</a> is particularly poor, using air purifiers, wearing masks designed to filter out fine particles, and following local health advisories.</p>



<p>Image Credit: NASA Earth Observatory</p>



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<h3 class="wp-block-heading" id="h-nbsp">&nbsp;</h3>

Haze pollution is an environmental crisis in Thailand

<p>Today's <strong>Image of the Day</strong> from NASA Webb Images features an extraordinary view of Uranus, the seventh planet from the sun in our solar system.&nbsp;</p>



<p>The photo reveals the rings, moons, and extreme seasons of the ice giant Uranus in unprecedented detail.&nbsp;</p>



<h2 class="wp-block-heading" id="h-dynamic-north-polar-cap-nbsp">Dynamic north polar cap&nbsp;</h2>



<p>“The Webb image exquisitely captures Uranus’s seasonal north polar cap, including the bright, white, inner cap and the dark lane in the bottom of the polar cap,” noted NASA.</p>



<p>Unlike Earth, where polar ice caps are formed by the freezing of water, Uranus's polar caps are thought to be primarily composed of a dense concentration of haze in the atmosphere.&nbsp;</p>



<p>The polar cap's haze is likely composed of methane particles. Methane in Uranus's atmosphere condenses into ice particles, which then create a thick haze that scatters sunlight, giving the polar cap its distinct bright appearance in visible and infrared light.</p>



<p>The polar cap is dynamic and changes over time. It becomes more prominent during the summer season of each pole. </p>



<p>As Uranus moves along its orbit, the cap's appearance transforms, with the haze becoming thicker and brighter when the pole is in continuous sunlight.</p>



<h2 class="wp-block-heading" id="h-the-zeta-ring-nbsp">The Zeta ring&nbsp;</h2>



<p>The inner and outer rings of Uranus are visible in the image, including Zeta - the innermost ring which is the faintest and most difficult to observe.</p>



<p>The <a href="https://www.earth.com/news/stunning-photo-of-uranus-and-its-rings-and-moons-captured-by-the-webb-telescope/" target="_blank" rel="noreferrer noopener">rings of Uranus</a> are primarily composed of narrow bands of particles, likely made of water ice mixed with a dark material. These rings are distinct from those of Saturn in that they are much darker and narrower.</p>



<p>The faintness and characteristics of the Zeta ring make it a subject of interest in studies related to the dynamics and composition of planetary ring systems.</p>



<h2 class="wp-block-heading" id="h-moons-of-uranus-nbsp">Moons of Uranus&nbsp;</h2>



<p>The <a href="https://science.nasa.gov/mission/webb/multimedia/images/" target="_blank" rel="noreferrer noopener">Webb</a> photo also features nine of the planet’s <a href="https://www.earth.com/news/nasa-four-uranus-moons-may-have-oceans-that-are-miles-deep/" target="_blank" rel="noreferrer noopener">moons</a>, which appear as blue dots surrounding the rings.&nbsp;</p>



<p>“Clockwise starting at 2 o’clock, they are: Rosalind, Puck, Belinda, Desdemona, Cressida, Bianca, Portia, Juliet, and Perdita. The orbits of these moons share the 98-degree tilt of their parent planet relative to the plane of the solar system,” noted NASA.</p>



<p>Uranus has 27 known moons, and they are divided into three main groups based on their orbits: the inner moons, the major moons, and the irregular moons.</p>



<p>The <a href="https://www.earth.com/news/uranus-moon-ariel-may-have-a-hidden-ocean/" target="_blank" rel="noreferrer noopener">moons</a> of Uranus are unique because they are named after characters from the works of William Shakespeare and Alexander Pope, rather than being named after figures from classical mythology, as is common for the moons of other planets.</p>



<h2 class="wp-block-heading" id="h-the-ice-giant-uranus-nbsp">The ice giant Uranus&nbsp;</h2>



<p>Uranus is classified as an "ice giant" because, unlike the gas giants Jupiter and Saturn, which are primarily composed of hydrogen and helium, Uranus has a significant proportion of "ices" in its composition.&nbsp;</p>



<p>In astronomical terms, ices refer to volatile substances like water, ammonia, and methane, which exist in solid or liquid forms at the low temperatures found in the outer solar system.</p>



<p>Uranus has a thick atmosphere of hydrogen and helium, but beneath that, it contains a large, dense mantle composed of these ices, along with rock and other heavier elements.&nbsp;</p>



<p>The term <a href="https://www.earth.com/news/diamond-rain-may-be-common-on-giant-icy-planets/" target="_blank" rel="noreferrer noopener">ice giant</a> differentiates Uranus (and Neptune, the other ice giant) from the larger gas giants, emphasizing the different chemical compositions and internal structures of these planets.</p>



<h2 class="wp-block-heading" id="h-climate-of-uranus-nbsp">Climate of Uranus&nbsp;</h2>



<p>Uranus has a unique and extreme climate, largely influenced by its unusual tilt, which causes the planet to rotate almost on its side. This tilt leads to extreme seasonal variations, with each pole experiencing 42 years of continuous sunlight followed by 42 years of darkness.&nbsp;</p>



<p>Even though it is closer to the sun than Neptune, Uranus is the coldest planet in the solar system, with temperatures plunging to as low as -224°C (-371°F). The reason for this is not fully understood, but it might be due to an internal heat distribution anomaly.</p>



<p>Despite these frigid conditions, Uranus experiences intense weather patterns, including powerful storms and winds that can reach speeds of up to 900 kilometers per hour. These winds blow in the same direction as the planet’s rotation and are some of the fastest in the solar system.</p>



<p>Storms on Uranus are driven by its internal heat and the interaction of its <a href="https://www.earth.com/news/uranus-is-more-gassy-less-icy-than-we-ever-imagined/" target="_blank" rel="noreferrer noopener">atmospheric gases</a>. Observations have shown that these storms can be quite large, sometimes comparable in size to the Earth, and can last for several years.&nbsp;</p>



<p>The planet’s extreme axial tilt also means that the storms and weather patterns are highly variable, depending on the season. During equinoxes, when the Sun is directly over the equator, Uranus exhibits more storm activity compared to when the poles are pointed towards the Sun or away from it.</p>



<h2 class="wp-block-heading" id="h-observations-of-uranus">Observations of Uranus</h2>



<p>“One day on Uranus is about 17 hours, so the planet’s rotation is relatively quick. This makes it supremely difficult for observatories with a sharp eye like Webb to capture one simple image of the entire planet - storms and other atmospheric features, and the planet’s moons, move visibly within minutes,” explained NASA.</p>



<p>“This image combines several longer and shorter exposures of this dynamic system to correct for those slight changes throughout the observing time.”</p>



<p>The first recorded observations of Uranus were made by John Flamsteed on December 13, 1690. However, Flamsteed mistakenly identified the planet as a star, which he named “34 Tauri."&nbsp;</p>



<p>It wasn't until March 13, 1781, that Uranus was officially identified as a planet by William Herschel. He initially thought he had discovered a comet, but further observations and calculations by other astronomers confirmed that it was a new planet, making Uranus the first planet discovered in modern history with the aid of a telescope.</p>



<p>Image Credit: NASA, ESA, CSA, STScI</p>



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The ice giant Uranus in stunning detail

Today's Image of the Day from NASA Webb Images features...

<p>Today's Image of the Day from NASA Earth Observatory features a strong extratropical cyclone, which struck the Pacific Northwest on November 19, 2024.</p>



<p>“The storm knocked over trees and left nearly 600,000 people without power in Washington state on November 20, according to news reports,” noted <a href="https://search.app?link=https%3A%2F%2Fearthobservatory.nasa.gov%2Fimages%2F153605%2Fextratropical-cyclone-whips-over-the-pacific-northwest&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">NASA</a>. “This image shows the storm system at 1:50 p.m. Pacific Time on November 19.” </p>



<p>According to NASA, mature extratropical cyclones like this often feature comma-shaped cloud patterns that are the product of ‘conveyor belt’ circulation. “Heavy precipitation is often present near the low-pressure head of the comma.”</p>



<h2 class="wp-block-heading" id="h-impacts-of-the-extratropical-cyclone-nbsp">Impacts of the extratropical cyclone&nbsp;</h2>



<p>The “bomb cyclone” brought <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fhow-much-does-climate-change-influence-extreme-weather-events%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">severe weather</a>, including strong winds exceeding 70 mph, heavy rainfall, and snow in higher elevations. These conditions led to significant disruptions, including downed trees and hazardous travel conditions.</p>



<p>In urban and rural areas, damage to infrastructure and properties was substantial, with emergency responders and utility crews working around the clock to restore services.&nbsp;</p>



<p>Additionally, mountain passes faced dangerous blizzard conditions, with up to 20 inches of snow accumulating in some areas, severely affecting travel.</p>



<h2 class="wp-block-heading" id="h-rapid-pace-of-acceleration">Rapid pace of acceleration</h2>



<p>Chris Dolce is a meteorologist at The Weather Channel. He noted that on the evening of November 19, the storm’s central pressure dropped to levels on par with a storm in October 2021, which saw the lowest pressure in about 50 years of records for that region.</p>



<p>“The pace of the storm’s intensification was more than double the criteria for bombogenesis - a popular term that describes a midlatitude cyclone that rapidly intensifies into a ‘bomb cyclone,’” said NASA.</p>



<p>The rapidly dropping atmospheric pressure at the center of the <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fcoastal-hurricanes-are-intensifying-faster-due-to-climate-change%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">storm</a> caused winds to intensify quickly. According to the National Weather Service in Seattle, wind gusts reached up to 77 miles per hour in the mountains southeast of the city.</p>



<p>“The cyclone kicked off a long-duration atmospheric river that forecasters expect will park over Northern California and southern Oregon through November 22. The National Weather Service estimates that these areas could see rainfall totals of 12 to 16 inches over the duration of the storm,” noted NASA.</p>



<h2 class="wp-block-heading" id="h-what-is-an-extratropical-cyclone">What is an extratropical cyclone?</h2>



<p>An extratropical cyclone is a large-scale weather system that forms outside the tropics, typically between 30° and 60° latitude, and is associated with areas of low pressure.&nbsp;</p>



<h3 class="wp-block-heading" id="h-energy-source">Energy source</h3>



<p>These cyclones obtain their energy from the contrast in temperature between air masses, such as cold polar air and warm subtropical air. This contrast creates instability and drives atmospheric circulation.</p>



<h3 class="wp-block-heading" id="h-development-of-extratropical-cyclones-nbsp">Development of extratropical cyclones&nbsp;</h3>



<p>Extratropical cyclones usually have well-defined warm and cold fronts. They often develop along the polar front, where cold and warm air masses meet.</p>



<p>A common area for their development is the mid-latitudes, particularly in regions like the North Atlantic and North Pacific.</p>



<h3 class="wp-block-heading" id="h-weather-conditions">Weather conditions</h3>



<p>Extratropical cyclones can bring a variety of <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fhuman-activity-is-rapidly-changing-weather-in-north-america%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">weather conditions</a>, including heavy rain, snow, strong winds, and severe storms. They are responsible for much of the day-to-day weather in mid-latitude regions.</p>



<h3 class="wp-block-heading" id="h-tropical-vs-extratropical-cyclones-nbsp">Tropical vs. extratropical cyclones&nbsp;</h3>



<p>While <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Ffast-moving-tropical-cyclones-are-becoming-more-powerful%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">tropical cyclones</a> derive energy from warm ocean waters and have a warm core, extratropical cyclones gain energy from temperature contrasts and have a cold core.</p>



<p>Tropical cyclones typically lack fronts, whereas extratropical cyclones are defined by them.</p>



<p>These systems are essential in distributing heat and energy across the planet, playing a critical role in the Earth's climate system.</p>



<h2 class="wp-block-heading" id="h-caught-off-guard-by-the-weather">Caught off guard by the weather</h2>



<p>The bomb cyclone in the Pacific Northwest highlights the importance of <a href="https://search.app?link=https%3A%2F%2Fwww.earth.com%2Fnews%2Fnew-era-in-forecasting-ai-will-improve-extreme-weather-warnings%2F&amp;utm_campaign=aga&amp;utm_source=agsadl2%2Csh%2Fx%2Fgs%2Fm2%2F4" target="_blank" rel="noreferrer noopener">preparedness</a>, as residents were urged to secure loose outdoor items, stock emergency supplies, and avoid unnecessary travel.</p>



<p>The fire department in Bellevue, east of Seattle, posted a Severe Weather Safety alert on Facebook: “It’s severe out there. Trees are coming down all over the city, with multiple falling onto homes. If you are able, head to the lowest floor you can and stay away from windows. Do not go outside if you can avoid it.”</p>



<p>The image was captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on NOAA’s JPSS-1 (Joint Polar Satellite System-1).</p>



<p>Image Credit: NASA Earth Observatory</p>



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Bomb cyclone rapidly intensified in the Pacific Northwest

<p>Today's <strong>Image of the Day</strong> from the European Space Agency features the barred spiral galaxy NGC 1559, located around 35 million light-years away in the little-observed southern constellation Reticulum. The image was captured by the James Webb Space Telescope.&nbsp;</p>



<h2 class="wp-block-heading" id="h-fuel-for-star-formation">Fuel for star formation </h2>



<p>"The data featured in this portrait make use of two of Webb’s instruments: the Mid-InfraRed Instrument (MIRI) and Near-InfraRed Camera (NIRCam)," noted <a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>.</p>



<p>"Here MIRI captures the glow of interstellar dust grains, which trace out the interstellar medium, the fuel for future star formation. NIRCam shows the light from stars, even young stars hidden behind prodigious amounts of dust. NIRCam also captures emission from ionised nebulae around young stars."</p>



<h2 class="wp-block-heading" id="h-webb-reveals-galaxies-in-new-light">Webb reveals galaxies in new light</h2>



<p>According to ESA, the data was collected by the <a href="https://sites.google.com/view/phangs/home">PHANGS team</a> as part of a program in which Webb will observe 55 <a href="https://www.earth.com/news/james-webb-captures-galaxies-that-are-too-old-to-exist/">galaxies</a> that have also been mapped by the Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope, the Hubble Space Telescope, and more.&nbsp;</p>



<p>"By combining Webb’s unprecedented view of the dust and stars with data from these other facilities, the team aims to obtain a new, highly detailed view of how stars are born, live, and die in galaxies across the Universe."</p>



<h2 class="wp-block-heading" id="h-ngc-1559-a-loner-in-space">NGC 1559: A loner in space</h2>



<p>Although NGC 1559 appears to sit close to one of our nearest neighbors in the sky - the Large Magellanic Cloud (LMC) - this is just a trick of perspective, noted ESA.</p>



<p>While it is part of the Reticulum constellation, NGC 1559 is not part of the Local Group of galaxies but instead resides in a more distant region of space.</p>



<p>"In reality, NGC 1559 is physically nowhere near the LMC in space; in fact it truly is a loner, lacking the company of any nearby galaxies or membership of any galaxy cluster."</p>



<h2 class="wp-block-heading" id="h-star-formation-in-ngc-1559">Star formation in NGC 1559</h2>



<p>NGC 1559 is notable for its active star formation and strong magnetic fields. It has also been the site of several <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, making it of particular interest to astronomers studying stellar evolution and the lifecycle of stars.</p>



<p>The structure of NGC 1559 includes well-defined spiral arms that are rich in young, hot stars and regions of ionized gas, indicative of ongoing <a href="https://www.earth.com/news/black-hole-is-starving-its-host-galaxy-of-star-forming-fuel/" target="_blank" rel="noreferrer noopener">star formation</a>.</p>



<p>The galaxy’s central bar is believed to play a role in driving gas towards the core, fueling both the star formation and the activity around its nucleus.</p>



<h2 class="wp-block-heading" id="h-an-extragalactic-wonder">An extragalactic wonder</h2>



<p>Despite being relatively small compared to larger galaxies like the Milky Way, NGC 1559 is an important object for understanding how barred spiral galaxies evolve and the processes that trigger supernovae.</p>



<p>The galaxy’s remote location and active nature make it a fascinating subject of study in the field of extragalactic astronomy. The isolation of NGC 1559 allows for a clearer view of its structure without much interference from neighboring galaxies.</p>



<h2 class="wp-block-heading" id="h-barred-spiral-galaxies">Barred spiral galaxies</h2>



<p>Barred spiral galaxies are a type of spiral galaxy characterized by a central bar-shaped structure composed of stars. This bar extends out from the core and connects to the galaxy's spiral arms, which swirl outward in a graceful pattern.</p>



<p>Scientists believe that the bar plays a crucial role in the evolution of the galaxy, funneling gas towards the core and potentially triggering star formation or feeding a central black hole. </p>



<p>The <a href="https://www.earth.com/news/newly-discovered-stars-milky-way-are-old-as-universe/" target="_blank" rel="noreferrer noopener">Milky Way</a>, our own galaxy, is an example of a barred spiral. These galaxies are quite common in the universe, making up about two-thirds of all observed spiral galaxies.</p>



<p>The bar itself is thought to be a temporary feature, developing as the galaxy matures and possibly disappearing over time as the dynamics of the stars change. </p>



<h2 class="wp-block-heading" id="h-the-reticulum-constellation">The Reticulum constellation</h2>



<p>The Reticulum constellation is a small, faint constellation in the southern sky. Its name means "the reticle" in Latin, which refers to the crosshairs in an eyepiece of a telescope. </p>



<p>The constellation was named in the 18th century by the French astronomer Nicolas Louis de Lacaille to honor the reticle he used in his scientific instruments. It is one of the 88 modern constellations recognized by the International Astronomical Union.</p>



<p>Image Credit: ESA/Webb, NASA &amp; CSA, A. Leroy, J. Lee and the PHANGS Team</p>



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Spiral galaxy NGC 1559 is a loner in outer space

Today's Image of the Day from the European Space Agency...

<p>The nature of dark matter has puzzled astronomers for 90 years since discovering that 85% of the universe's matter is invisible through our telescopes.&nbsp;</p>



<p>Currently, the most promising candidate for dark matter is the axion, a lightweight particle that scientists worldwide are fervently trying to detect.</p>



<p>Astrophysicists at the <a href="https://www.berkeley.edu/" target="_blank" rel="noreferrer noopener">University of California, Berkeley</a>, now suggest that axions could be discovered within seconds of detecting gamma rays from a nearby <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernova explosion</a>.&nbsp;</p>



<p>If axions exist, they would be produced in large quantities during the first 10 seconds after a massive star collapses into a neutron star. These axions would escape and transform into high-energy gamma rays within the star's intense magnetic field.</p>



<h2 class="wp-block-heading" id="h-detecting-gamma-rays-from-supernova-explosions">Detecting gamma rays from supernova explosions </h2>



<p>Detecting these <a href="https://www.earth.com/news/brightest-gamma-ray-burst-ever-recorded-had-a-rare-energy-peak/" target="_blank" rel="noreferrer noopener">gamma rays</a> today is possible only if the Fermi Gamma-ray Space Telescope - the sole gamma-ray telescope currently in orbit - is pointing in the direction of the supernova at the time it explodes. Given the telescope's field of view, there's about a one-in-ten chance of this happening.</p>



<p>Yet, a single detection of gamma rays would pinpoint the mass of the axion, particularly the so-called QCD axion, across a vast range of theoretical masses, including those currently being investigated in Earth-based experiments.&nbsp;</p>



<p>Conversely, the lack of a detection would eliminate a large range of potential masses for the axion, rendering many current <a href="https://www.earth.com/news/existence-of-dark-matter-confirmed-by-new-study/" target="_blank" rel="noreferrer noopener">dark matter</a> searches irrelevant.</p>



<h2 class="wp-block-heading" id="h-searching-in-our-cosmic-neighborhood">Searching in our cosmic neighborhood </h2>



<p>The issue is that, for the gamma rays to be bright enough to detect, the supernova must be nearby - within our Milky Way galaxy or one of its satellite galaxies.&nbsp;</p>



<p>Nearby stars explode, on average, only every few decades. The last nearby supernova was in 1987 in the Large Magellanic Cloud, a satellite of the Milky Way.&nbsp;</p>



<p>At that time, a now-defunct gamma-ray telescope, the Solar Maximum Mission, was pointing in the supernova's direction but wasn't sensitive enough to detect the predicted intensity of gamma rays, according to the UC Berkeley team's analysis.</p>



<h2 class="wp-block-heading" id="h-seeking-the-true-nature-of-dark-matter">Seeking the true nature of dark matter </h2>



<p>Benjamin Safdi is an associate professor of physics at UC Berkeley and senior author of the study.</p>



<p>“If we were to see a supernova, like supernova 1987A, with a modern gamma-ray telescope, we would be able to detect or rule out this QCD axion, this most interesting axion, across much of its parameter space - essentially the entire parameter space that cannot be probed in the laboratory, and much of the parameter space that can be probed in the laboratory, too. And it would all happen within 10 seconds," explained Professor Safdi.</p>



<p>The researchers are concerned that when the long-overdue supernova occurs in the nearby universe, we won't have the necessary instruments to observe the gamma rays produced by axions. </p>



<h2 class="wp-block-heading" id="h-a-fleet-of-gamma-ray-telescopes">A fleet of gamma-ray telescopes</h2>



<p>In discussions with colleagues who build gamma-ray telescopes, the experts are exploring the feasibility of launching one - or a fleet - of such telescopes to cover 100% of the sky 24/7, ensuring any gamma-ray burst would be detected.</p>



<p>The researchers have even proposed a name for their full-sky gamma-ray satellite constellation: the GALactic AXion Instrument for Supernova, or GALAXIS.</p>



<p>“I think all of us on this paper are stressed about there being a next supernova before we have the right instrumentation,” noted Safdi. “It would be a real shame if a supernova went off tomorrow and we missed an opportunity to detect the axion - it might not come back for another 50 years.”</p>



<h2 class="wp-block-heading" id="h-the-search-for-dark-matter">The search for dark matter</h2>



<p>Initial searches for dark matter focused on faint, massive compact halo objects (MACHOs) theorized to be sprinkled throughout our galaxy and the cosmos.&nbsp;</p>



<p>When these didn't materialize, physicists shifted their attention to elementary particles that should be detectable in Earth-bound labs. Weakly interacting massive particles (WIMPs) also failed to show up.&nbsp;</p>



<p>In the quest to find the true nature of dark matter, the best candidate is the axion - a particle that fits well within the standard model of physics and solves several outstanding puzzles in particle physics.</p>



<p>“It seems almost impossible to have a consistent theory of gravity combined with quantum mechanics that does not have particles like the axion,” Safdi said.</p>



<h2 class="wp-block-heading" id="h-strongest-candidate-for-an-axion">Strongest candidate for an axion </h2>



<p>Axions also naturally emerge from string theory - a hypothesis about the universe's underlying geometry - and might help unify <a href="https://www.earth.com/news/radical-new-theory-finally-unites-gravity-spacetime-and-the-quantum-realm/" target="_blank" rel="noreferrer noopener">gravity</a>, which explains interactions on cosmic scales, with quantum mechanics, which describes the infinitesimal.&nbsp;</p>



<p>The strongest candidate for an axion is the QCD axion, named after quantum chromodynamics, the prevailing theory of the strong force.&nbsp;</p>



<p>Theoretically, QCD axions interact weakly with all matter through the four fundamental forces: gravity, electromagnetism, the strong force, and the weak force.&nbsp;</p>



<p>One consequence is that, in a strong magnetic field, an axion should occasionally transform into an electromagnetic wave, or photon. This distinguishes axions from neutrinos, which only interact through gravity and the weak force and ignore electromagnetism.</p>



<h2 class="wp-block-heading" id="h-neutron-stars-and-axion-detection">Neutron stars and axion detection</h2>



<p>Laboratory experiments - such as the ALPHA Consortium (Axion Longitudinal Plasma Haloscope), DMradio, and ABRACADABRA, all involving UC Berkeley researchers - use compact cavities that resonate with and amplify the faint electromagnetic field or photon produced when a low-mass axion transforms in the presence of a strong magnetic field.</p>



<p>Astrophysicists have also proposed looking for axions produced inside <a href="https://www.earth.com/news/neutron-star-collisions-push-the-limits-of-extreme-physics/" target="_blank" rel="noreferrer noopener">neutron stars</a> immediately after a core-collapse supernova, like 1987A. Until now, they've primarily focused on detecting gamma rays from these axions' slow transformation into photons in the magnetic fields of galaxies. </p>



<p>Safdi and his colleagues realized that this process is not very efficient at producing gamma rays detectable from Earth.</p>



<p>Instead, they explored the production of gamma rays by axions in the strong magnetic fields around the very star that generated the axions. Supercomputer simulations showed that this process very efficiently creates a burst of gamma rays dependent on the axion's mass.&nbsp;</p>



<h2 class="wp-block-heading" id="h-burst-of-neutrinos-from-a-hot-star">Burst of neutrinos from a hot star </h2>



<p>This burst should occur simultaneously with a burst of neutrinos from inside the hot neutron star. However, the burst of axions lasts a mere 10 seconds after the neutron star forms - after that, the production rate drops dramatically - though it happens hours before the outer layers of the star explode.</p>



<p>“This has really led us to thinking about neutron stars as optimal targets for searching for axions as axion laboratories,” Safdi said. "Neutron stars have a lot of things going for them. They are extremely hot objects. They also host very strong magnetic fields.” </p>



<p>“The strongest magnetic fields in our universe are found around neutron stars, such as magnetars, which have magnetic fields tens of billions of times stronger than anything we can build in the laboratory. That helps convert these axions into observable signals.”</p>



<h2 class="wp-block-heading" id="h-advancing-the-search-for-axions">Advancing the search for axions</h2>



<p>Two years ago, Safdi and his colleagues established the best upper limit on the mass of the QCD axion at about 16 million electron volts, or about 32 times less than the mass of the electron. This was based on the cooling rate of neutron stars, which would cool faster if axions were produced along with neutrinos inside these hot, dense objects.</p>



<p>In the current paper, the UC Berkeley team not only describes the production of gamma rays following a core collapse to a neutron star but also uses the non-detection of gamma rays from the 1987A supernova to set the best constraints yet on the mass of axion-like particles, which differ from QCD axions in that they do not interact via the strong force.</p>



<p>They predict that a gamma-ray detection would allow them to identify the QCD axion mass if it is above 50 microelectron volts (μeV), or about one ten-billionth the mass of the electron. A single detection could refocus existing experiments to confirm the mass of the axion, Safdi said.&nbsp;</p>



<p>While a fleet of dedicated gamma-ray telescopes is the best option for detecting gamma rays from a nearby supernova, a fortunate observation with Fermi would be even better.</p>



<p>“The best-case scenario for axions is Fermi catches a supernova. It's just that the chance of that is small,” Safdi said. “But if Fermi saw it, we'd be able to measure its mass. We'd be able to measure its interaction strength. We'd be able to determine everything we need to know about the axion, and we'd be incredibly confident in the signal because there's no ordinary matter which could create such an event.”</p>



<h2 class="wp-block-heading" id="h-uncovering-the-true-nature-of-dark-matter">Uncovering the true nature of dark matter </h2>



<p>The researchers are anxious about missing a rare opportunity to detect axions due to inadequate instrumentation. They will continue to discuss the feasibility of launching new gamma-ray telescopes to ensure continuous sky coverage.</p>



<p>Safdi's team believes that capturing gamma rays from a nearby supernova could not only confirm the existence of axions but also provide detailed information about their properties. This could revolutionize our understanding of dark matter and the fundamental forces of nature.</p>



<p>The quest to uncover the true nature of dark matter continues to drive innovation in astrophysics. By focusing on gamma rays emitted during supernova explosions, scientists hope to finally detect axions and solve one of the most enduring mysteries in physics.&nbsp;</p>



<p>The stakes are high, and time is of the essence. With the potential for a nearby supernova to occur at any moment, researchers are eager to have the right tools in place to seize this fleeting opportunity.</p>



<p>The study is published in the journal <a href="http://dx.doi.org/10.1103/PhysRevLett.133.211002" target="_blank" rel="noreferrer noopener"><em>Physical Review Letters</em></a>.</p>



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The true nature of dark matter may be revealed in a supernova

The nature of dark matter has puzzled astronomers for 90...

<p>The Chinese Mars rover Zhurong is adding an exciting twist to the story and history of water on Mars. </p>



<p>After landing in southern Utopia Planitia on Mars in May 2021, the now-defunct Zhurong rover went to work exploring the Martian surface, and its latest findings might just change the way we think about the Red Planet.</p>



<p>Bo Wu and a team of researchers from <a href="https://www.polyu.edu.hk/en/" target="_blank" rel="noreferrer noopener">Hong Kong Polytechnic University</a> believe they've found compelling evidence of an ocean shoreline for a massive body of water that once covered Mars' northern lowlands.</p>



<h2 class="wp-block-heading" id="h-what-is-the-zhurong-mars-rover">What is the Zhurong Mars rover?</h2>



<p>The Zhurong rover is <a href="https://www.earth.com/news/china-plans-to-inhabit-a-space-station-on-the-moon-by-2030/" target="_blank" rel="noreferrer noopener">China's first foray</a> into Martian exploration, landing successfully on Mars in May 2021 as part of the <a href="https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2020-049A" target="_blank" rel="noreferrer noopener">Tianwen-1</a> mission. </p>



<p>Weighing around 240 kilograms (530 lbs) -- about the size of a small car -- Zhurong is packed with scientific instruments, including navigation and topography cameras, a multispectral camera for analyzing surface materials, and a ground-penetrating radar that can probe up to 100 meters beneath the surface. </p>



<p>These tools allow Zhurong to capture detailed images, study the composition of rocks and soil, and investigate the planet's subsurface structures.</p>



<p>What sets Zhurong apart is its ability to study Mars both above and below ground. The ground-penetrating radar is particularly exciting because it helps scientists search for signs of water ice and understand the geological layers hidden <a href="https://www.earth.com/news/does-life-exist-below-the-icy-surface-of-mars/" target="_blank" rel="noreferrer noopener">beneath the surface.</a> </p>



<p>The rover also carries instruments to examine <a href="https://www.earth.com/news/the-internal-structure-of-mars-core-is-finally-revealed/" target="_blank" rel="noreferrer noopener">Mars' magnetic field</a> and atmospheric conditions, contributing valuable data to our understanding of the planet's climate and potential for habitability.</p>



<h2 class="wp-block-heading" id="h-zhurong-sees-water-related-features-on-mars">Zhurong sees water-related features on Mars</h2>



<p>For years, scientists have pondered the possibility of a vast ocean on Mars, especially during the Hesperian period about 3.7 billion years ago. Concrete proof, however, has been hard to come by. </p>



<p>Using a mix of Zhurong's onboard cameras and ground-penetrating radar, plus remote sensing data from orbiting satellites, the team identified several intriguing water-related features around the rover's landing area.</p>



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/Zhurong-mars-rover_china_landing-site_ocean-shore_Sci-Reports_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/Zhurong-mars-rover_china_landing-site_ocean-shore_Sci-Reports_1s.webp" alt="The Zhurong landing site (red cross) shown on the geologic map by Tanaka et al. Regions of different colors indicate different geologic units. The red box shows the study area, covering an area of ~ 1800 km × 800 km. The thick black line is the Deuteronilus contact indicating a possible shoreline across the region. The background map is a shaded relief of the MOLA topography." class="wp-image-1951081"/></a><figcaption class="wp-element-caption"><em>The Zhurong landing site (red cross) shown on the geologic map by Tanaka et al. Regions of different colors indicate different geologic units. The red box shows the study area, covering an area of ~ 1800 km × 800 km. The thick black line is the Deuteronilus contact indicating a possible shoreline across the region. The background map is a shaded relief of the MOLA topography.</em></figcaption></figure>



<p>Since touching down, Zhurong has traveled about 1.2 miles, studying the geology of its surroundings in search of signs of water or ice. </p>



<p>The features spotted include crater-like pitted cones, troughs, sediment channels, and <a href="https://www.earth.com/news/water-frost-detected-on-mars-enormous-volcanoes/" target="_blank" rel="noreferrer noopener">mud volcano formations</a>. If that sounds like the remnants of a beachfront, you're onto something. </p>



<p>According to Bo Wu and his colleagues, these formations are consistent with what you'd expect to find in a nearshore zone, suggesting this area was once a coastline.</p>



<h2 class="wp-block-heading" id="h-dating-the-martian-ocean">Dating the Martian ocean</h2>



<p>Based on the composition of surface deposits, the team estimates that the ocean likely existed around 3.68 billion years ago. </p>



<p>"The water was heavily silted, forming the layering structure of the deposits," study co-author Sergey Krasilnikov of the Hong Kong Polytechnic University told Reuters. </p>



<p>This silt-laden water would have created distinct sedimentary layers, much like those found in ancient seabeds on Earth.</p>



<p>Interestingly, the researchers propose that after forming, the ocean froze over for about 10,000 to 100,000 years -- a mere <a href="https://www.earth.com/news/when-was-mars-habitable-much-more-recently-than-we-thought/" target="_blank" rel="noreferrer noopener">blink in geological terms</a>. </p>



<p>This freezing period etched out the coastline features observed today before the ocean eventually dried up roughly 260 million years later. Imagine a vast frozen ocean, sitting quietly on Mars, waiting for its turn to disappear.</p>



<h2 class="wp-block-heading" id="h-not-everyone-agrees">Not everyone agrees</h2>



<p>However, not everyone is jumping on the bandwagon. </p>



<p>Benjamin Cardenas of <a href="https://www.psu.edu/" target="_blank" rel="noreferrer noopener">Pennsylvania State University</a> points out that erosion over billions of years would likely have erased such delicate features. It's a fair concern -- Mars isn't exactly a place where things stay preserved forever. </p>



<p>Wu acknowledges this skepticism but suggests that asteroid impacts might have resurfaced portions of the shoreline, making them detectable today.</p>



<h2 class="wp-block-heading" id="h-implications-for-martian-life">Implications for Martian life</h2>



<p>So, what does all this mean in the grand scheme of things? Well, the presence of an ancient ocean has profound implications for <a href="https://www.earth.com/news/meteorite-that-struck-mars-reveals-when-the-planet-had-liquid-water/" target="_blank" rel="noreferrer noopener">our understanding of Mars</a>. </p>



<p>Water is a key ingredient for life as we know it. If Mars had oceans, could it have also hosted life? It's a tantalizing thought that keeps scientists up at night.</p>



<h2 class="wp-block-heading" id="h-nasa-s-insight-lander">NASA's Insight Lander </h2>



<p>Adding another layer to the mystery, <a href="https://science.nasa.gov/mission/insight/" target="_blank" rel="noreferrer noopener">NASA's Insight lander</a> found that a significant amount of water had seeped into Mars's crust. </p>



<p>"At least we have identified a place that should, in principle, be able to sustain life," Michael Manga of the <a href="https://www.universityofcalifornia.edu/" target="_blank" rel="noreferrer noopener">University of California</a>, one of the study authors, said in a previous statement. </p>



<p>This underground water could have provided a stable environment for <a href="https://www.earth.com/news/insights-alien-life-mars-water-sulfur-discovered-gained-studying-extreme-life-earth/" target="_blank" rel="noreferrer noopener">life to develop</a>.</p>



<h2 class="wp-block-heading" id="h-what-s-next-for-zhurong-and-mars-water">What's next for Zhurong and Mars water?</h2>



<p>But here's the kicker: to get definitive answers, we need to bring Martian samples back to Earth for detailed analysis. </p>



<p>China's Tianwen 3 Mars sample return mission aims to do just that by 2031, potentially beating NASA's own sample return mission to the punch. </p>



<p>If all goes according to plan, we'll have pieces of Mars right here on Earth in less than a decade.</p>



<p>As we await these missions, Zhurong continues to send valuable data, inching us closer to understanding the Red Planet's watery past. </p>



<p>Could Mars have been teeming with life billions of years ago? It's the million-dollar question. Only time -- and more research -- will tell.</p>



<p>The full study was published in the journal <em><a href="https://www.nature.com/articles/s41598-024-75507-w" target="_blank" rel="noreferrer noopener">Scientific Reports</a></em>.</p>



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Mars Zhurong rover finds an ocean shoreline on the Red Planet

The Chinese Mars rover Zhurong is adding an exciting twist...

<p>Human-caused climate change has intensified the strength of Atlantic hurricanes by about 18 miles per hour (29 kilometers per hour) over the past six years, according to a recent study.</p>



<p>For most of the 40 storms analyzed, the extra energy from warmer oceans caused them to escalate by an entire hurricane category, as reported in the journal <a href="https://dx.doi.org/10.1088/2752-5295/ad8d02" target="_blank" rel="noreferrer noopener"><em>Environmental Research: Climate</em></a>. </p>



<p>According to the National Oceanic and Atmospheric Administration (<a href="https://www.noaa.gov/" target="_blank" rel="noreferrer noopener">NOAA</a>), a Category 5 storm causes more than 400 times the damage of a minimal Category 1 hurricane, over 140 times the damage of a minimal Category 3 hurricane, and more than five times the damage of a minimal Category 4 storm.</p>



<h2 class="wp-block-heading" id="h-significant-increases-in-wind-speed">Significant increases in wind speed</h2>



<p>For three storms, including this month's Hurricane Rafael, climate change boosted <a href="https://www.earth.com/news/new-method-developed-to-measure-the-wind/" target="_blank" rel="noreferrer noopener">wind</a> speeds so much that they increased by two storm categories. According to the study authors, this is not about more storms but increasing power from the worst storms.</p>



<p>“We know that the intensity of these storms is causing a lot more catastrophic damage in general,” said lead author Daniel Gilford, a climate scientist at <a href="https://www.climatecentral.org/" target="_blank" rel="noreferrer noopener">Climate Central</a>, which conducts research on global warming. “Damages do scale (up) with the intensity.”</p>



<h2 class="wp-block-heading" id="h-hurricane-strength-in-a-warmer-climate">Hurricane strength in a warmer climate </h2>



<p>The effect was especially noticeable in more powerful storms, including those that reached the top of the Saffir-Simpson scale of storm intensity: Category Five, according to the study's authors.&nbsp;</p>



<p>While the study focused on storms from 2019 to 2023, the researchers included recent named storms from this year, all of which experienced an increase due to <a href="https://www.earth.com/news/coastal-hurricanes-are-intensifying-faster-due-to-climate-change/" target="_blank" rel="noreferrer noopener">climate change</a>.</p>



<p>“We had two Category Five storms here in 2024,” Gilford said. “Our analysis shows that we would have had zero Category Five storms without human-caused climate change.”</p>



<h2 class="wp-block-heading" id="h-notable-hurricanes-that-gained-strength">Notable hurricanes that gained strength </h2>



<p>This year's three most devastating storms - Beryl, Helene, and Milton - increased by 18 mph (29 kph), 16 mph (26 kph), and 24 mph (39 kph) respectively because of climate change, the authors stated.&nbsp;</p>



<p>A separate study by <a href="https://www.worldweatherattribution.org/" target="_blank" rel="noreferrer noopener">World Weather Attribution</a> (WWA) found that deadly Helene's wind speed increased by about 13 mph, which is close, noted <a href="https://www.imperial.ac.uk/" target="_blank" rel="noreferrer noopener">Imperial College London</a> climate scientist Friederike Otto, who coordinates the WWA team and praised the Climate Central work.</p>



<p>“It absolutely makes sense from a fundamental standpoint that what's going on is we've added more energy to the system,” NOAA chief Rick Spinrad said at United Nations climate talks in Baku, Azerbaijan. </p>



<p>“The change is going to manifest in terms of what we're already seeing. You look at Hurricane Helene which was massive, 500 miles across. We're going to see changes in terms of the velocity of these storms. We're going to see changes in terms of Hurricane Milton spawning so many tornadoes.”</p>



<h2 class="wp-block-heading" id="h-consistent-patterns-over-recent-years">Consistent patterns over recent years</h2>



<p>Since 2019, eight storms - 2019's Humberto, 2020's Zeta, 2021's Sam and Larry, 2022's Earl, 2023's Franklin, and 2024's Isaac and Rafael - have increased by at least 25 mph (40 kph) in wind speed. Humberto and Zeta saw the most significant gains, each increasing by 31 miles per hour (50 kph).</p>



<p>In 85% of the storms studied over the last six years, the authors observed a clear fingerprint of climate change in <a href="https://www.earth.com/news/what-causes-the-rapid-intensification-of-hurricanes/" target="_blank" rel="noreferrer noopener">storm strength</a>, Gilford said.</p>



<h2 class="wp-block-heading" id="h-warmer-oceans-and-hurricane-strength">Warmer oceans and hurricane strength</h2>



<p>Warm water is the main fuel for hurricanes. The warmer the Atlantic, Caribbean, and Gulf of Mexico become, the more potential energy is available for storms. Other factors - such as high-level crosswinds and dry air - can weaken hurricanes.</p>



<p>The waters in hurricane-prone areas have increased by 2 to 3 degrees Fahrenheit (1.1 to 1.6 degrees Celsius) on average, and by as much as 4 degrees Fahrenheit (2.2 degrees Celsius) due to climate change, Gilford explained.&nbsp;</p>



<h2 class="wp-block-heading" id="h-linking-warmer-water-to-stronger-storms">Linking warmer water to stronger storms</h2>



<p>This information comes from Climate Central's use of scientifically accepted techniques to regularly track how much warmer oceans are due to the burning of coal, oil, and natural gas.</p>



<p>The experts use computer simulations to create a fictional world without human-caused warming and then compare it to current reality, attributing the differences to <a href="https://www.earth.com/news/2023-climate-change-report-record-high-temperatures-greenhouse-gases-sea-level-rise/" target="_blank" rel="noreferrer noopener">greenhouse gases</a>. </p>



<p>They also account for other factors, such as the reduction of sulfate pollution from marine shipping, which had been slightly counteracting the warming before skies became clearer.</p>



<p>To understand how warmer waters lead to stronger storms, the authors examined a parameter called potential intensity, which is essentially the speed limit for any given storm based on the environmental conditions around it.</p>



<h2 class="wp-block-heading" id="h-expert-insights-and-future-implications">Expert insights and future implications</h2>



<p><a href="https://www.mit.edu/">MIT</a> hurricane expert and meteorology professor Kerry Emanuel, who pioneered potential intensity measurements, wasn't part of the study but said the findings are logical. It demonstrates the increase in storm strength that he predicted would occur 37 years ago, he noted.</p>



<p>Previous studies have shown that climate change has caused hurricanes to intensify more quickly and move more slowly, leading to increased rainfall.</p>



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Climate change has amplified hurricane strength

Human-caused climate change has intensified the strength of Atlantic hurricanes...

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<p><br />
<span style="font-weight: 400;">Today’s </span><b>Video of the Day</b><span style="font-weight: 400;"> comes from </span><a href="http://www.ntu.edu.sg/publicportal/"><span style="font-weight: 400;">Nanyang Technological University</span></a><span style="font-weight: 400;"> (NTU), who have launched Singapore’s largest wind turbine.</span></p>
<p><span style="font-weight: 400;">The new <a href="https://www.earth.com/news/wind-energy-facilities-birds/">turbine</a> measures roughly 140 feet in height and generates 100 kilowatts of power, which is enough to power 45 different homes. It is also sensitive enough to generate power with winds as slow as 3 meters per second.</span></p>
<p><span style="font-weight: 400;">&#8220;The deployment of Singapore&#8217;s first wind turbine is a big milestone in the nation&#8217;s commitment in developing clean energy technologies for the region,” said Professor Lam Khin Yong, NTU&#8217;s Acting Provost, Chief of Staff and Vice President for Research. “As a leading global university, NTU is proud to support Singapore&#8217;s efforts in meeting its sustainability objectives and pave the way towards a greener future.&#8221;</span></p>
<p><span style="font-weight: 400;"> &#8212;</span></p>
<p><i><span style="font-weight: 400;">By </span></i><a href="mailto:rarnold@earth.com"><i><span style="font-weight: 400;">Rory Arnold</span></i></a><i><span style="font-weight: 400;">, </span></i><a href="https://www.earth.com/staff"><i><span style="font-weight: 400;">Earth.com</span></i></a><i><span style="font-weight: 400;"> Staff Writer</span></i></p>
<p><i><span style="font-weight: 400;">Video Credit: </span></i><a href="http://www.ntu.edu.sg/publicportal/"><i><span style="font-weight: 400;">Nanyang Technological University</span></i></a></p>

NTU launches Singapore’s largest wind turbine