An objective analysis dataset of the Venus atmosphere, ALERA-V version 1.0, has been released. This objective analysis provides the best estimate of the state of the Venus atmosphere produced by […]
climate
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Imaging & Spectroscopy, Status Report, Venus, Water/Hycean Worlds & Oceanography
Seasonal Insolation Variability On Early Venus: Implications For Energy Budget
Venus and Earth are similar in bulk properties yet followed dramatically different climatic trajectories.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Imaging & Spectroscopy, Status Report
Revisiting the Greenhouse Effect of Non-greenhouse Gases in the Atmospheres of Earth-like Planets
Although non-greenhouse gases can vary substantially in abundance in Earth-like atmospheres, their climatic influences remain insufficiently understood.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Imaging & Spectroscopy, Status Report, TRAPPIST-1, Water/Hycean Worlds & Oceanography
Exploring TRAPPIST-1 Climate States With An Energy Balance Model
This paper presents a version of the HEXTOR energy balance model that has been configured for the study of habitable terrestrial planets orbiting low-mass stars. The model is validated for […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Cryobiology, Extinction events, Gaia - Planetary Perspectives, Habitable Zones, Icy Worlds, Mapping, Geodesy, Cartography, Bathymetry, Polar / Alpine Expeditions, Press Release, Robotics/Rovers/UAVs, Sample Return
A New Explanation For Snowball Earth
A new study by Earth scientists in the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) offers an explanation for one of Earth’s great climate puzzles: how […]
Posted inAtmospheres, Climate, Weather, Gaia - Planetary Perspectives, Habitable Zones, Imaging & Spectroscopy, Status Report
Habitable Planet Orbital Recon: GEO-KOMPSAT-2A Views Super Typhoon Sinlak
The image on the left is in TrueColor. The image on the right shows water vapor imagery.
![WASP-39b transmission spectra and cloud scenarios. Spectra are observed with JWST (orange), HST (magenta), and VLT (green) in comparison to models with different Fe content: full IWF Graz cloud model (black line), Fe[s] replaced (dark gray), FeS[s] replaced (middle gray), and all Fe-binding materials replaced (light gray). The Fe-free mixed-material cloud compositions provide a good fit in the near-IR but not in the optical. — astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/04/Exoplanet-climate.png?resize=1200%2C718&ssl=1)
Posted inExoplanets, -moons, -comets, Gas Giants, Status Report
Exoplanet Climate Characterization With Transit Asymmetries
Context. Space missions such as CHEOPS, JWST, and PLATO facilitate detailed characterization of exoplanets, particularly close-in gas giants and their wide range of global temperatures and climate regimes.
Posted inBiochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Toward Inferring the Surface Fluxes of Biosignature Gases on Rocky Exoplanets from Telescope Spectra
The James Webb Space Telescope and the future Habitable Worlds Observatory aim to discover exoplanet atmospheric spectra that detect life. Currently, most existing spectral “retrieval” algorithms focus on inferring the […]
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Habitable Zones, Origin & Evolution of Life, Status Report, Water/Hycean Worlds & Oceanography
Mineral-facilitated Aqueous Synthesis Of Hydrogen Cyanide From Prebiotically Abundant Amino Acids For Chemical Evolution
Recent advances in prebiotic chemistry suggest that hydrogen cyanide (HCN) serves as a fundamental precursor for nearly all essential biomolecules and protometabolic processes for life’s emergence.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Habitable Zones, Icy Worlds, Status Report, Terraforming & Geoengineering, Water/Hycean Worlds & Oceanography
Climate And Ocean Circulation Changes Toward A Modern Snowball Earth
It has been hypothesized that the Earth may have experienced snowball events in the past, during which its surface became completely covered with ice. Previous studies used general circulation models […]