Atmosphere expansion occurs despite gravity pulling it toward Earth
Is it true that atmosphere expansion occurs despite gravity pulling it toward Earth?
Yes. Atmospheric expansion driven by thermal energy and stellar radiation can occur and even lead to atmospheric escape, overcoming the inward pull of gravity.
Verdict: SUPPORTED · 2 sources for, 0 against · Last checked
The retrieved papers include studies on planetary upper atmospheres (such as Mars and terrestrial planets) that directly examine how thermal heating and solar irradiation lead to atmospheric expansion and thermal escape, demonstrating that expansion occurs despite the gravitational pull. Therefore, the claim is supported by the literature.
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Cramer, A., Withers, P., Elrod, M., Benna, M., & Mahaffy, P. (2020). Effects of the 10 September 2017 Solar Flare on the Density and Composition of the Thermosphere of Mars. doi.org. https://doi.org/10.1029/2020JA028518
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NV, E., H, L., P, O., YN, K., YN, K., KG, K., ML, K., M, G., A, H., & H, B. (2013). XUV-exposed, non-hydrostatic hydrogen-rich upper atmospheres of terrestrial planets. Part I: atmospheric expansion and thermal escape.. doi.org. https://doi.org/10.1089/ast.2012.0957
What does the evidence say?
The retrieved papers include studies on planetary upper atmospheres (such as Mars and terrestrial planets) that directly examine how thermal heating and solar irradiation lead to atmospheric expansion and thermal escape, demonstrating that expansion occurs despite the gravitational pull. Therefore, the claim is supported by the literature.
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