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Exploring Planets and Earth

This article delves into the stability of CO2 in planetary atmospheres, particularly focusing on Venus and Titan. It highlights the findings of Yung and colleagues regarding the catalytic role of chlorine in CO2 stability and explores Titan's prebiotic conditions alongside its atmospheric composition. The research emphasizes the implications of anthropogenic greenhouse gases like CO2, CH4, and N2O on global climate change. Key studies from Caltech and satellite observations contribute to understanding habitability across celestial bodies, presenting a comprehensive overview of atmospheric chemistry and planetary exploration.

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Exploring Planets and Earth

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  1. Exploring Planets and Earth Yuk Ling Yung Caltech

  2. Venus (Stability of CO2 atmosphere) McElroy, Sze and Yung 1973 Yung and DeMoreIcarus1982 CO2 is unstable against UV A tiny amount of Cl (< 1ppm) Catalytically oxidizes CO back to CO2 via the peroxychloroformyl radical (ClCO3)

  3. Titan = Prebiotic Earth? Titan: Moon of Saturn 1.5 bar N2, 95K Yung et al 1984 Organic synthesis CH4 + UV = CxHy

  4. C2H6 Lakes predicted by Lunine, Stevenson and Yung 1983; observed by Cassini 2010

  5. Global Climate Change Three leading anthropogenic greenhouse gases CO2 CH4 N2O Habitability

  6. Wang, Yung et al. 1976 Yung et al. 1976

  7. First global map of CO2 from AURA satellite Chahine, .. Yung, 2008 V2x

  8. Li, …Yung 2009 Time 15 June 2009

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