<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>For the past two months, a small asteroid named 2024 PT5 has been keeping Earth company, acting as a temporary "mini-moon." This week, it's set to drift away, pulled by the stronger gravity of the sun.</p>



<p>Richard Binzel, an astronomer at the Massachusetts Institute of Technology (<a href="https://www.mit.edu" target="_blank" rel="noreferrer noopener">MIT</a>), has been following these kinds of celestial visitors for years. </p>



<p>"These happen more often than we think, but they're small and tough to spot," Binzel explained. "Only lately have our telescopes become powerful enough to catch them regularly."</p>



<p>In August, a team of astronomers from the <a href="https://www.ucm.es/english" target="_blank" rel="noreferrer noopener">Complutense University</a> of Madrid detected 2024 PT5 using a powerful telescope in Sutherland, South Africa. </p>



<p>They weren't the only ones watching; NASA's Asteroid Terrestrial-impact Last Alert System (<a href="https://fallingstar.com/home.php" target="_blank" rel="noreferrer noopener">ATLAS</a>) at Haleakala Observatory in Hawaii first noticed the asteroid on August 7, 2024.</p>



<p>This discovery has excited astronomers, offering a rare chance to learn more about <a href="https://www.earth.com/news/nasa-test-simulation-shows-earth-not-prepared-prevent-large-asteroid-strike/" target="_blank" rel="noreferrer noopener">near-Earth objects</a>. But what exactly is 2024 PT5, and why does it matter?</p>



<h2 class="wp-block-heading" id="h-2024-pt5-tiny-asteroid-big-role">2024 PT5: Tiny asteroid, big role</h2>



<p><a href="https://www.earth.com/news/its-official-earth-now-has-two-moons-captured-asteroid-2024-pt5/" target="_blank" rel="noreferrer noopener">Earth occasionally captures small asteroids</a> like 2024 PT5, placing them into temporary orbits around our planet. </p>



<p>While most asteroids orbit the sun on regular paths, some come close enough for Earth's gravity to grab them for a brief visit. </p>



<p>These cosmic hitchhikers stay with us for a short time -- typically a few weeks or months -- before breaking free and continuing their journey around the sun.</p>



<p>"All mini-moons are unique in their own way," said William Blackmore, Planetarium Director and Astronomy Instructor at <a href="https://www.mhcc.edu/" target="_blank" rel="noreferrer noopener">Mt. Hood Community College</a>. "This one isn't different from others except that it's the most recent."</p>



<h2 class="wp-block-heading" id="h-comparing-2024-pt5-to-the-moon">Comparing 2024 PT5 to the Moon</h2>



<p>To put things into perspective, 2024 PT5 is about 37 feet across. In contrast, <a href="https://www.earth.com/news/how-did-earth-get-its-moon-a-new-theory-has-emerged/" target="_blank" rel="noreferrer noopener">Earth's main moon</a> stretches a massive 2,159 miles in diameter. </p>



<p>That makes our moon over 300,000 times wider than this tiny asteroid. Knowing it's up there is pretty exciting, even if we can't see it without some serious telescopic equipment.</p>



<p>"These temporary captures are natural cosmic laboratories," Binzel mentioned. "They help us understand the small bodies that <a href="https://www.earth.com/news/27500-hidden-near-earth-asteroids-discovered-using-google-cloud/" target="_blank" rel="noreferrer noopener">come close to Earth</a> and could be important for future space missions."</p>



<h2 class="wp-block-heading" id="h-how-2024-pt5-became-a-mini-moon">How 2024 PT5 became a mini-moon</h2>



<p>Understanding how 2024 PT5 became Earth's temporary companion involves a bit of <a href="https://www.earth.com/news/finding-order-in-the-chaos-of-the-three-body-problem/" target="_blank" rel="noreferrer noopener">orbital mechanics</a>. </p>



<p>Blackmore explained, "It's moving along with us in our orbit around the sun. It's part of a group of asteroids called the Arjuna asteroids, which move at about the same pace as Earth."</p>



<p>He added an analogy to make it clearer: </p>



<p>"Imagine a skateboarder dropping into a skate park. They ride the curves, adding energy as they go. That's like the asteroid getting caught in <a href="https://www.earth.com/news/dart-mission-debris-will-create-a-human-made-meteor-shower/" target="_blank" rel="noreferrer noopener">Earth's gravitational field</a>, riding the curve before moving on."</p>



<h2 class="wp-block-heading" id="h-spotting-mini-moons-like-2024-pt5">Spotting mini-moons like 2024 PT5</h2>



<p>Catching sight of mini-moons is no easy task. </p>



<p>They're incredibly small and faint, often just a few dozen feet across, which means they don't reflect much sunlight. This makes them nearly invisible against the dark backdrop of space.</p>



<p>Astronomers use powerful telescopes equipped with <a href="https://www.earth.com/news/gaia-reveals-moons-around-hundreds-of-asteroids/" target="_blank" rel="noreferrer noopener">sensitive detectors and smart software</a> to find them. </p>



<p>Projects like the ATLAS system scan the skies every night, searching for any objects that weren't there before. </p>



<p>When they spot something moving in a way that suggests it's close to Earth, they alert other astronomers to help confirm the find.</p>



<p>"It's a collaborative effort," Blackmore said. "Combining technology and teamwork helps us spot these elusive cosmic visitors."</p>



<h2 class="wp-block-heading" id="h-why-does-any-of-this-matter">Why does any of this matter?</h2>



<p>While 2024 PT5 doesn't pose any threat to Earth, <a href="https://www.earth.com/news/is-there-a-fifth-force-of-nature-asteroids-provide-new-clues/" target="_blank" rel="noreferrer noopener">studying it is crucial</a>. </p>



<p>"It's important to analyze how it moves and interacts with Earth's gravitational pull," Blackmore noted. "This helps us refine our techniques for tracking objects that could cross our path again."</p>



<p>Another expert, Todd, highlighted the practical applications of this knowledge. </p>



<p>"We need to understand how to intercept an asteroid at a distance and change its direction," he said. "This could be vital in <a href="https://www.earth.com/news/nasa-dart-mission-proves-humanity-can-be-saved-from-asteroid-collision/" target="_blank" rel="noreferrer noopener">preventing potential impacts</a> in the future."</p>



<h2 class="wp-block-heading" id="h-challenges-in-observing-2024-pt5">Challenges in observing 2024 PT5</h2>



<p>For those eager to see this mini-moon, experts warn that it would be extremely difficult. </p>



<p>"You'd need a telescope with a diameter of at least 30 inches," Blackmore mentioned. "That's beyond what most amateur astronomers have."</p>



<p>Todd agreed, adding, "It won't be visible to the naked eye. Being 33 feet wide and so far away, you'd need a very large telescope."</p>



<h2 class="wp-block-heading" id="h-inspiration-for-future-space-missions">Inspiration for future space missions</h2>



<p>Blackmore envisioned future missions that could take advantage of these temporary visitors. </p>



<p>"It would be fascinating if we had missions ready to send small satellites or probes to these objects when they come close," he mused. "Imagine building a network of sensors or cameras traveling along with us, like space webcams."</p>



<p>Todd also saw potential in <a href="https://www.earth.com/news/asteroid-named-psyche-is-worth-10000-quadrillion-for-whoever-can-extract-minerals/" target="_blank" rel="noreferrer noopener">asteroid mining</a> and scientific discovery. </p>



<p>"There might be materials on these asteroids that we can't find on Earth," he said. "They could solve problems in medicine or technology. But we need to weigh the benefits carefully."</p>



<h2 class="wp-block-heading" id="h-brief-visit-with-a-lasting-impact">Brief visit with a lasting impact</h2>



<p>The short stay of asteroid 2024 PT5 serves as a reminder of the dynamic nature of our solar system. While it didn't stick around long, its presence offered valuable opportunities for learning and exploration.</p>



<p>As technology advances, we'll likely spot more of these mini-moons. Each one gives us a chance to understand our cosmic environment better and prepare for the future.</p>



<p>The full study was published in the&nbsp;<a href="https://iopscience.iop.org/article/10.3847/2515-5172/ad781f" target="_blank" rel="noreferrer noopener">journal IOPscience</a>.</p>



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Earth has lost its mini-moon, which may have come from our main Moon

For the past two months, a small asteroid named 2024...

<p>In the world of science, we often focus on what we see. We examine what is visible, tangible, and easy to perceive with our own two eyes. But what about the sounds of the past - more specifically, the sounds of dinosaurs?</p>



<p>How can we possibly know what a creature from millions of years ago sounded like? Well, this can be answered using paleoacoustics.</p>



<p>Before we dive into the how, let's take a moment to consider what we are talking about. Picture the Parasaurolophus - a duck-billed <a href="https://www.earth.com/news/rare-triassic-fossil-gondwanax-paraisensis-may-rewrite-history-of-dinosaurs/" target="_blank" rel="noreferrer noopener">dinosaur</a> with a unique crest.</p>



<p>This huge creature, standing around 16 feet tall and weighing between 6,000 to 8,000 pounds, dominated the landscapes some 70 million to 80 million years ago. It has been named in many science fiction films and dinosaur-themed games.</p>



<h2 class="wp-block-heading" id="h-decoding-dinosaur-sounds">Decoding dinosaur sounds</h2>



<p>Sound is essentially vibrations traveling through the air. These vibrations hit our eardrums, get converted into electrical signals, and are interpreted by our brains. </p>



<p>But for creatures like the Parasaurolophus, with unique physical attributes, their sounds would have been produced and resonated differently.</p>



<p>The starting point to understanding how the Parasaurolophus might have sounded is through mathematical modeling. </p>



<p>Sounds a bit strange, doesn't it? But it's not just number crunching. Math is a universal language that is able to represent complex physical phenomena in a way that can be computed, simulated, and even visualized.</p>



<h2 class="wp-block-heading" id="h-exploring-what-dinosaurs-sounded-like">Exploring what dinosaurs sounded like</h2>



<p>Enter our scientist, Hongjun Lin, a researcher at <a href="https://www.nyu.edu" target="_blank" rel="noreferrer noopener">New York University</a> who is on a mission to decode the sounds of the past.</p>



<p>He presented his research on the acoustic characteristics of a physical model of the Parasaurolophus' crest at the 187th Meeting of the Acoustical Society of America in November 2024.</p>



<p>"I've been fascinated by giant animals ever since I was a kid. I'd spend hours reading books, watching movies, and imagining what it would be like if <a href="https://www.earth.com/news/carnian-pluvial-episode-one-million-years-of-rain-triggered-dinosaur-takeover-of-earth/" target="_blank" rel="noreferrer noopener">dinosaurs</a> were still around today," said Lin.</p>



<p>But a realization in college sparked a new direction for Lin's passion. "It wasn't until college that I realized the sounds we hear in movies and shows - while mesmerizing - are completely fabricated using sounds from modern animals."</p>



<p>"That's when I decided to dive deeper and explore what dinosaurs might have actually sounded like."</p>



<h2 class="wp-block-heading" id="h-creating-dinosaur-sounds">Creating dinosaur sounds</h2>



<p>To bring mathematics into the tangible realm, Lin created a physical setup - affectionately named the "Linophone." It is made of tubes that resemble the resonance chambers used in musical instruments.</p>



<p>This theoretical model, despite its simplicity, was pivotal in approximating what was happening acoustically inside the Parasaurolophus' crest.</p>



<p>The Linophone isn’t a perfect replica of the Parasaurolophus, but it's a stepping stone - a means to verify the mathematical framework.</p>



<p>Lin's initial findings suggest that the Parasaurolophus' crest was used for resonance, a phenomenon not unfamiliar to us - it’s the same principle that gives birds their unique songs.</p>



<h2 class="wp-block-heading" id="h-where-do-we-go-from-here">Where do we go from here?</h2>



<p>The journey has just begun. Lin's research is far from complete, and the mathematical model is still a work in progress. </p>



<p>But the implications of this study extend beyond just dinosaurs. This research paves the way for studying animals with similar vocal structures, leading to a deeper understanding of Earth's ancient inhabitants.</p>



<p>The idea doesn't stop there. Lin shares his plan for the future - an accessible plug-in for people to experiment with and even incorporate dinosaur sounds into music. Can you imagine rock and roll with a dash of Parasaurolophus?</p>



<p>"Once we have a working model, we'll move toward using&nbsp;fossil&nbsp;scans," Lin said. "My ultimate goal is to re-create the sound of the Parasaurolophus."</p>



<h2 class="wp-block-heading" id="h-understanding-how-dinosaurs-communicated">Understanding how dinosaurs communicated</h2>



<p>Understanding how dinosaurs communicated provides insights into their social structures and behaviors. The Parasaurolophus, with its crest capable of producing distinctive sounds, is a fascinating subject to explore these <a href="https://www.earth.com/news/qunkasaura-pintiquiniestra-new-sauropod-dinosaur-discovered-in-spain/" target="_blank" rel="noreferrer noopener">dynamics</a>. </p>



<p>This anatomical feature may have allowed it to generate low-frequency calls, which could travel across long distances - a valuable adaptation for herd communication over expansive territories.</p>



<p>Such communication would have played a pivotal role in coordinating movement, warning of approaching predators, or even engaging in mating rituals. </p>



<p>As research progresses, scientists hope to unravel whether these sounds were unique to each species, locality, or even individual, offering a more nuanced picture of dinosaur life.</p>



<h2 class="wp-block-heading" id="h-broader-implications-of-the-research">Broader implications of the research </h2>



<p>While Lin's work has primarily focused on recreating the sounds of the Parasaurolophus, the broader implications of paleoacoustic research are vast. </p>



<p>By refining techniques and understanding, scientists can apply these methods to other <a href="https://www.earth.com/news/nadir-crater-second-massive-asteroid-impact-discovered-dinosaur-extinction/" target="_blank" rel="noreferrer noopener">prehistoric animals</a>, providing a comprehensive soundtrack of the past. These innovations bolster educational tools, allowing students and enthusiasts worldwide to engage more deeply with Earth's history through sound. </p>



<p>The field also enriches other disciplines, such as paleontology, biology, and acoustics - promoting interdisciplinary collaboration and innovative thinking.</p>



<p>As the boundaries of current research continue to expand, so too does our capacity to connect with the ancient world, transforming silent fossils into a symphony of prehistory.</p>



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What did dinosaurs sound like?

In the world of science, we often focus on what...

<p>The Arctic plays an increasingly important role in global discussions about rising sea levels and the threats they pose to coastal areas around the world.</p>



<p>With this in mind, it is necessary to explore the intricate process of calving - where ice breaks away from a glacier's edge.</p>



<p>This phenomenon significantly contributes to sea-level rise, which makes it imperative that we understand the process and can use it to predict future changes in our world.</p>



<h2 class="wp-block-heading" id="h-arctic-exploration-with-sentinel-1">Arctic exploration with Sentinel-1</h2>



<p>A recent stride forward in this quest for understanding has been made by a remarkable collaboration between I-SEA (based in France) and <a href="https://www.norceresearch.no/en/" target="_blank" rel="noreferrer noopener">NORCE</a> (from Norway). </p>



<p>As part of the Space for Shore project, the scientists have made extensive use of over a thousand images from the Sentinel-1 mission.</p>



<p>Their purpose? To meticulously monitor the evolution of Svalbard's coastal <a href="https://www.earth.com/news/the-worlds-glaciers-contain-less-ice-than-previously-thought/" target="_blank" rel="noreferrer noopener">glaciers</a>.</p>



<p>The Sentinel-1 mission, a key element of the European Union’s Copernicus Program, employed synthetic aperture radar (SAR) technology to capture high-resolution data in the challenging Arctic conditions.</p>



<p>Thanks to this technology, there is now consistent, year-round monitoring of these critical glaciers.</p>



<h2 class="wp-block-heading" id="h-measuring-calving-activity">Measuring calving activity</h2>



<p>Using Sentinel-1 data between 2015 and 2023, the researchers were able to map glacier front lines and measure calving activity during <a href="https://www.earth.com/image/svalbard-melts-into-the-arctic-ocean/" target="_blank" rel="noreferrer noopener">Svalbard</a>’s summer months, the period when calving intensities peak.</p>



<p>One significant breakthrough was the ability to define the summer glacier fronts. </p>



<p>The researchers examined images taken between July and September and were able to identify summer glacier fronts as areas where glacier extent is maintained 95% of the time during these months.</p>



<p>What's more, the team found a way to understand summer calving intensity by observing floating <a href="https://www.earth.com/news/iceberg-that-weighs-more-than-the-eiffel-tower-is-floating-freely/" target="_blank" rel="noreferrer noopener">icebergs</a> and growlers. </p>



<p>Interestingly, summers with a higher occurrence of these ice masses indicate more active calving and accelerated glacier retreat. These are crucial signs of a glacier’s health and stability.</p>



<h2 class="wp-block-heading" id="h-observing-changes-in-arctic-glaciers">Observing changes in Arctic glaciers</h2>



<p>In Kongsfjorden, one of the primary study areas, glaciers like Kronebreen and Kongsvegen showed significant changes.</p>



<p>Daily Sentinel-1 observations were used to classify the region into areas of glacier, iceberg, and growler occurrence.</p>



<p> The Sentinel-1 method "provides a statistically defined composite of the <a href="https://www.earth.com/news/ice-free-arctic-summers-could-be-the-new-normal-by-2030/" target="_blank" rel="noreferrer noopener">summer glacier</a> front positions and calving intensities, revealing the dynamic interactions between ice and ocean over time," explained Jörg Haarpaintner, a team member from NORCE.</p>



<p>Manon Tranchand, the project's lead researcher, noted that this analysis paints a clear picture of current changes in Arctic glaciers.</p>



<p>"They're crucial for predicting the future impacts of climate change on these sensitive regions," said Tranchand. </p>



<p>"Without the consistent, high-resolution data from Sentinel-1, monitoring these dynamic ice-ocean interactions wouldn't be possible. Ongoing warming is likely to accelerate ice loss, and our data show how that could contribute to global sea-level rise. Sentinel-1’s capabilities allow us to capture these shifts with unprecedented accuracy."</p>



<h2 class="wp-block-heading" id="h-the-launch-of-sentinel-1c">The launch of Sentinel-1C</h2>



<p>Scheduled for launch next month, Sentinel-1C represents a significant leap forward in the monitoring of Arctic glaciers and global climate impacts.</p>



<p>The soon-to-be addition to the Sentinel-1 mission will offer enhanced radar imaging capabilities and improved continuity for crucial climate research.</p>



<p>With its advanced capabilities, Sentinel-1C will amplify our ability to capture detailed, year-round data on glacier front lines, <a href="https://www.earth.com/news/birth-of-an-iceberg-a-83-breaks-free-from-antarctica/" target="_blank" rel="noreferrer noopener">calving</a> rates, and ice-ocean interactions, even amidst the challenging conditions of the Arctic. </p>



<h2 class="wp-block-heading" id="h-global-implications-of-arctic-ice-loss">Global implications of Arctic ice loss</h2>



<p>The insights gained from monitoring Arctic glacier calving extend far beyond the region itself. </p>



<p>As glaciers retreat and calving intensifies, the influx of freshwater into the oceans disrupts natural currents, including the Atlantic Meridional Overturning Circulation (AMOC), a critical component of Earth's climate system. </p>



<p>This disruption could lead to significant shifts in weather patterns, such as harsher winters in Europe and intensified monsoons in South Asia.</p>



<p>Moreover, Arctic ice loss exacerbates the global feedback loop of climate change. As ice melts, it exposes darker ocean water, which absorbs more sunlight, accelerating warming - a phenomenon known as the albedo effect.</p>



<p>These changes not only impact the Arctic's fragile ecosystems but also have cascading effects on biodiversity, fisheries, and human livelihoods worldwide.</p>



<p>By understanding the intricacies of glacier calving through missions like Sentinel-1, researchers are equipping policymakers with the tools to anticipate and mitigate these far-reaching impacts. </p>



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Satellite images reveal hidden retreat of Arctic glaciers

The Arctic plays an increasingly important role in global discussions...


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<p>Today’s <strong>Video of the Day</strong> from the <a href="https://www.esrf.fr/">European Synchrotron Radiation Facility</a> (ESRF) describes the details of a new study which reveals that dinosaurs died in the spring.</p>



<p>The researchers analyzed X-rays and carbon isotope records, which showed that fish died within 60 minutes after the Chicxulub meteoroid collided with the Earth.&nbsp;</p>



<p>For the analysis, the experts focused on the bones of the fish skeletons to examine seasonal growth rings.</p>



<p>“The retrieved growth rings not only captured the life histories of the fishes but also recorded the latest Cretaceous seasonality and thus the season in which the catastrophic extinction occurred,” explained study senior author Jeroen van der Lubbe.</p>



<p>“In all studied fishes, bone cell density and volumes can be traced over multiple years. These were on the rise but had not yet peaked during the year of death,” said study co-author Dennis Voeten.</p>



<p>In particular, the experts examined the diet of a paddlefish, which prefers to feed upon zooplankton. Throughout the year, the abundance of zooplankton fluctuates.&nbsp;</p>



<p>The study revealed that when the paddlefish died, zooplankton were approaching their summer climax.</p>



<p>“This temporary increase of ingested zooplankton enriched the skeleton of its predator with the heavier 13C carbon isotope relative to the lighter 12C carbon isotope,” explained Suzan Verdegaal-Warmerdam.</p>



<p>“The carbon isotope signal across the growth record of this unfortunate paddlefish confirms that the feeding season had not yet climaxed &#8211; death came in spring,” added study lead author Melanie During from Uppsala University.</p>



<p><em>Video Credit: ESA</em></p>



<p><em>&#8211;</em><em>&#8212;</em></p>



<p><em>By </em><a href="http://csexton@earth.com"><em>Chrissy Sexton</em></a><em>, </em><a href="https://www.earth.com/staff/"><em>Earth.com</em></a><em> Staff Writer</em></p>


New evidence that dinosaurs died in the spring