A new study shows unprecedented heat is likely to lead to the next mass extinction since the dinosaurs died out, eliminating nearly all mammals in some 250 million years time.
Atmospheres, Climate, Weather
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Relative Abundances Of CO2, CO, and CH4 In Atmospheres Of Earth-like Lifeless Planets
Carbon is an essential element for life on Earth, and the relative abundances of major carbon species (CO2, CO, and CH4) in the atmosphere exert fundamental controls on planetary climate […]
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Habitable Zones, Imaging & Spectroscopy, Press Release, TRAPPIST-1
JWST Insights Into The Atmosphere Of Exoplanet TRAPPIST-1 b And The Star TRAPPIST-1
Astronomers led by a team at Université de Montréal has made important progress in understanding the intriguing TRAPPIST-1 exoplanetary system, which was first discovered in 2016 amid speculation it could […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Gaia - Planetary Perspectives, Press Release, Societal Issues, Terraforming & Geoengineering
Theories About The Natural World May Need To Change To Reflect Human Impact
New research, reported in Nature Ecology & Evolution, (25 September 2023) has for the first time validated at scale, one of the theories that has underpinned ecology for over half […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Habitable Zones, Imaging & Spectroscopy, Status Report
Thermal Tides In Neutrally Stratified Atmospheres: Revisiting The Earth’s Precambrian Rotational Equilibrium
Rotational dynamics of the Earth, over geological timescales, have profoundly affected local and global climatic evolution, probably contributing to the evolution of life.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Space Weather & Heliophysics, Status Report
Impact of M-dwarf Stellar Wind and Photoevaporation on the Atmospheric Evolution of Small Planets
The evolution of a planet’s atmosphere depends strongly on its host star’s properties. When their host stars are younger, planets can experience stronger winds and EUV emissions. This is particularly […]
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography
Water Absorption In The Transmission Spectrum Of The Water-world Candidate GJ9827d
Recent work on the characterization of small exoplanets has allowed us to accumulate growing evidence that the sub-Neptunes with radii greater than ∼2.5R⊕ often host H2/He-dominated atmospheres both from measurements […]
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Icy Worlds, Press Release, Titan, Water/Hycean Worlds & Oceanography
The Impact Of Lake Shape And Size On Lake Breezes And Air-lake Exchanges On Titan
Titan, the largest moon of Saturn, has many lakes on its surface, formed mainly of liquid methane. Like water lakes on Earth, these methane lakes on Titan likely profoundly affect […]
Posted inAstrochemistry, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Carbon-bearing Molecules In A Possible Hycean Atmosphere
The search for habitable environments and biomarkers in exoplanetary atmospheres is the holy grail of exoplanet science. The detection of atmospheric signatures of habitable Earth-like exoplanets is challenging due to […]
Posted inArtemis & Lunar Exploration, Astrochemistry, Astrogeology, Atmospheres, Climate, Weather, Press Release, Space Weather & Heliophysics
Electrons From Earth May Be Forming Water On The Moon
A team of researchers, led by a University of Hawai‘i (UH) at Mānoa planetary scientist, discovered that high energy electrons in Earth’s plasma sheet are contributing to weathering processes on […]