A group of Japanese planetologists and astrophysicists has presented a new model that forces a rethink of climate mechanisms in exoplanet atmospheres. While inert gases like nitrogen were previously considered passive backgrounds that do not affect climate, new research has proven their active role in heat retention. This is reported by Ixbt.com reports .
Scientists identified two distinct nitrogen mechanisms: the "dilution effect" and the "loading effect." In the first case, nitrogen alters the atmospheric stratification, hindering the heat release process of water vapor. In the second case, nitrogen enhances the ability of water vapor to trap infrared radiation, further accelerating the greenhouse effect.
The study showed that the amount of carbon dioxide in the atmosphere determines which of these processes dominates. If CO2 is low, nitrogen can cool the planet after a certain point, but in a high-CO2 environment, nitrogen continuously intensifies the warming process.
This discovery is crucial for analyzing data obtained by space telescopes like James Webb. Astronomers must now account for nitrogen pressure when assessing the habitability of exoplanets; otherwise, climate conclusions may be inaccurate.
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