Most Americans can expect wetter winters in the future due to global warming, according to a new study led by a University of Illinois Chicago scientist.
Earth Sciences
13 hours ago
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107
Solar wind is a never-ending stream of charged particles coming from the sun. Rather than a constant breeze, this wind is rather gusty. As solar wind particles travel through space, they interact with the sun's variable magnetic ...
Astronomy
14 hours ago
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34
Accurate snow cover information is crucial for studying global climate and hydrology. However, deep learning approaches for retrieving snow cover fraction (SCF) often suffer from limitations in training data dependence and ...
Earth Sciences
Sep 25, 2024
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Mars wasn't always the cold desert we see today. There's increasing evidence that water once flowed on the red planet's surface, billions of years ago. And if there was water, there must also have been a thick atmosphere ...
Planetary Sciences
Sep 25, 2024
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106
During her summer travels to her native Belgium, University of Arizona professor Valerie Trouet noticed something that turned casual curiosity into a major scientific discovery: when the sun hid behind an overcast sky and ...
Earth Sciences
Sep 25, 2024
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9
A new analysis of satellite data finds that the record surge in atmospheric methane emissions from 2020 to 2022 was driven by increased inundation and water storage in wetlands, combined with a slight decrease in atmospheric ...
Earth Sciences
Sep 24, 2024
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51
Northeast Greenland is home to the 79° N Glacier—the country's largest floating glacier tongue, but also one seriously threatened by global warming. Warm water from the Atlantic is melting it from below. However, experts ...
Earth Sciences
Sep 24, 2024
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211
An international group of researchers including University of Arizona astronomers, using NASA's James Webb Space Telescope, has observed the atmosphere of a hot and uniquely inflated exoplanet. The exoplanet, which is the ...
Planetary Sciences
Sep 24, 2024
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88
One way to understand the potential for life on far-off planets—those in other solar systems that orbit different stars—is to study a planet's atmosphere. Telescopic images often capture traces of gases that may indicate ...
Astrobiology
Sep 23, 2024
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115
Most of the exoplanets we've discovered orbit red dwarf stars. This isn't because red dwarfs are somehow special, simply that they are common. About 75% of the stars in the Milky Way are red dwarfs, so you would expect red ...
Astrobiology
Sep 20, 2024
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46
An atmosphere (from Greek ατμός - atmos, 'vapor' + σφαίρα - sphaira, 'sphere') is a layer of gases that may surround a material body of sufficient mass, by the gravity of the body, and are retained for a longer duration if gravity is high and the atmosphere's temperature is low. Some planets consist mainly of various gases, but only their outer layer is their atmosphere (see gas giants).
The term stellar atmosphere describes the outer region of a star, and typically includes the portion starting from the opaque photosphere outwards. Relatively low-temperature stars may form compound molecules in their outer atmosphere. Earth's atmosphere, which contains oxygen used by most organisms for respiration and carbon dioxide used by plants, algae and cyanobacteria for photosynthesis, also protects living organisms from genetic damage by solar ultraviolet radiation. Its current composition is the product of billions of years of biochemical modification of the paleoatmosphere by living organisms.
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