Ocean salinity is known to dramatically affect the climates of Earth-like planets orbiting Sun-like stars, with high salinity leading to less ice and higher surface temperature.
habitability
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report
Climate Transition to Temperate Nightside at High Atmosphere Mass
Our recent work shows how M-Earth climates and transmission spectra depend on the amount of ice-free ocean on the planet’s dayside and the mass of N2 in its atmosphere. M-Earths […]
Posted inAriel Mission, Astronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Missions & Hardware, Press Release, Space Weather & Heliophysics
Proposed Space Missions To Explore Stellar Influence On Habitable Worlds
How the Sun influences the atmosphere, space weather and habitability of a planet, as well as the space between the stars, could be investigated by two proposed UK space missions, […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Dynamical Viability Assessment for Habitable Worlds Observatory Targets
Exoplanetary science is increasingly prioritizing efforts toward direct imaging of planetary systems, with emphasis on those that may enable the detection and characterization of potentially habitable exoplanets.
Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Extinction events, Fossils & Paleontology, Gaia - Planetary Perspectives, Habitable Zones, Origin & Evolution of Life, Press Release, Water/Hycean Worlds & Oceanography
Scientists Untangle Interactions Between Earth’s Early Life Forms And The Environment Over 500 Million Years
The atmosphere, the ocean and life on Earth interacted over the past 500-plus million years in ways that improved conditions for early organisms to thrive. Now, an interdisciplinary team of […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Statistics And Habitability of F-type Star–Planet Systems
F-type star–planet systems represent an intriguing case for habitability studies. Although F-type stars spend considerably less time on the main-sequence than G, K, and M-type stars, they still offer a […]
Posted inAtmospheres, Climate, Weather, Biophysics, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Magnetic Fields, Electromagnetism, bioelectricity,, Press Release, Space Weather & Heliophysics
Exploring The Effects Of Stellar Magnetism On Potential Habitability Of Exoplanets
Interest in Earth-like planets orbiting within the habitable zone of their host stars has surged, driven by the quest to discover life beyond our solar system. But the habitability of […]
![Annual mean climate across 2003-2018 derived from ERA5 for (a) surface air temperature Ts [K], (b) biotemperature Tbio [K], (c) precipitation P [mm day−1 ⊕ ], (d) evaporation E [mm day−1 ⊕ ]-- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/07/A-Novel-Metric-For-Assessing.png?resize=1200%2C715&ssl=1)
Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Extremeophiles and Extreme Environments, Gaia - Planetary Perspectives, Habitable Zones, Mapping, Geodesy, Cartography, Bathymetry, Status Report, Terraforming & Geoengineering, Water/Hycean Worlds & Oceanography
A Novel Metric For Assessing Climatological Surface Habitability
Planetary surface habitability has so far been, in the main, considered in its entirety. The increasing popularity of 3D modelling studies of (exo)planetary climate has highlighted the need for a […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Habitable Zones, Icy Worlds, Status Report, Water/Hycean Worlds & Oceanography
Resilience of Snowball Earth to Stochastic Events
Earth went through at least two periods of global glaciation (i.e., “Snowball Earth” states) during the Neoproterozoic, the shortest of which (the Marinoan) may not have lasted sufficiently long for […]
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography
A Large Biosignature Visible From Space: Phytoplankton Bloom Near Greenland
Editor’s note: with the future advent of powerful telescopes that may be able to resolve habitable worlds in images composed of a few pixels, large biological phenomena such as algal […]