Understanding planetary habitability is one of the major challenges of the current scientific era, particularly given the discovery of a large and diverse terrestrial exoplanet population.
climate
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Extinction events, Lava / magma ocean / Volcanic Worlds, Press Release, Terraforming & Geoengineering
Carbon Dioxide Release From Magma Deep Beneath Ancient Volcanoes Was A Hidden Driver Of Earth’s Past Climate
An international team of geoscientists led by a volcanologist at Rutgers University-New Brunswick has discovered that, contrary to present scientific understanding, ancient volcanoes continued to spew carbon dioxide into the […]
Posted inAstrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Habitable Zones, Imaging & Spectroscopy, Proxima Centauri, Status Report
Earth-like Exoplanets In Spin-orbit Resonances: Climate Dynamics, 3D Atmospheric Chemistry, and Observational Signatures
Terrestrial exoplanets around M- and K-type stars are important targets for atmospheric characterisation. Such planets are likely tidally locked with the order of spin-orbit resonances (SORs) depending on eccentricity. We […]
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Status Report
Cold Day-side Winds Shape Large Leading Streams in Evaporating Exoplanet Atmospheres
Recent observations of planetary atmospheres in HAT-P-32 b and HAT-P-67 b reveal extensive outflows reaching up to hundreds of planetary radii. The helium 1083 nm light curves for these planets, […]
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Saturn, Status Report
A Combined 3D Model Applied To Cloudy Warm Saturn Type Exoplanets Around M-dwarfs
Warm Saturn type exoplanets orbiting M-dwarfs are particularly suitable for in-depth cloud characterisation through transmission spectroscopy due to their favourable stellar to planetary radius contrast.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Caves, Craters, Mountains, Subsurface, Lava Tubes, Extinction events, Gaia - Planetary Perspectives, Habitable Zones, Imaging & Spectroscopy, Impact events, Lava / magma ocean / Volcanic Worlds, Status Report, Terraforming & Geoengineering, Water/Hycean Worlds & Oceanography
X-Raying Neutral Density Disturbances in the Mesosphere and Lower Thermosphere induced by the 2022 Hunga-Tonga Volcano Eruption-Explosion
We present X-ray observations of the upper atmospheric density disturbance caused by the explosive eruption of the Hunga Tonga-Hunga Ha’apai (HTHH) volcano on 15 January 2022.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Habitable Zones, Mars, Missions & Hardware, Press Release, Robotics/Rovers/UAVs
New Insights Into How Mars Became Uninhabitable
NASA’s Curiosity rover, currently exploring Gale Crater on Mars, is providing new details about how the ancient Martian climate went from potentially suitable for life — with evidence for widespread […]
![Vertical velocity and condensate cross-sections in (x,z) taken in the middle of the y-domain for the adiabatic simulation initialized on the moist adiabat. The top row shows the vertical velocity in [m/s] at different times throughout the CM1 simulation. The bottom row shows the condensate mixing ratio in [g/kg] at different times throughout the CM1 simulation. The vertical velocity cross-sections show clear convective inhibition in the lower atmosphere in all time steps. The corresponding condensate mixing ratio show a condensate formation nearly in the whole domain, but re-evaporation occurs at the boundary between the stable and convection regions. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/10/3D-Modeling-of-Moist-Convective-Inhibition.png?resize=1200%2C718&ssl=1)
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gas Giants, Habitable Zones, Status Report, Water/Hycean Worlds & Oceanography
3D Modeling of Moist Convective Inhibition in Hydrogen-Dominated Atmospheres
Many planets have hydrogen-dominated atmospheres, including sub-Neptune exoplanets, recently formed planets with primordial atmospheres, and the Solar System’s giant planets. Atmospheric convection behaves differently in hydrogen-rich atmospheres compared to higher […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Habitable Zones, Icy Worlds, Mars, Press Release, Terraforming & Geoengineering
Mars’ Missing Atmosphere Could Be Hiding In Plain Sight
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, […]
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Magnetic Fields, Electromagnetism, bioelectricity,, Radiation, Space Weather & Heliophysics, Status Report, Stellar Cartography
Radio Signatures of Star-Planet Interactions, Exoplanets, and Space Weather
Radio detections of stellar systems provide a window onto stellar magnetic activity and the space weather conditions of extrasolar planets, information that is difficult to attain at other wavelengths.