GEOLOGY 103 Lecture 9: Lecture9 Atmospheres and Hydrospheres
Document Summary
Venus and titan (moon of saturn: thick atmospheres that are 100% cloud covered 100% of the time. The atmosphere is the envelope of gas around a planet. The hydrosphere is the envelop of water (or other) liquid around a planet overlaps with atmosphere and crust. Three types of planetary atmosphere: trace atmosphere (i. e. mercury and moon, atmospheres that act as a geological agent (i. e. venus, earth, mars, titan) Trace atmospheres are produced by: captured solar wind particles, micro-impacts, evaporation at surface. Atmospheres of gas giants: mostly consist of hydrogen, nature of interaction with deeper levels in unknown. !1: smog is produced by the action of sunlight on organic compounds such as. Titan"s methane-ologic cycle: lakes, rivers, rain, methane: humid atmosphere. Ice = rock, therefore, water = magma. Venus, earth, mars: origins of atmosphere/hydrosphere: late addition of volatile compounds by comets, inconsistent with d/h ratios of earth"s oceans (carbonaceous chondrite meteorites/ asteroids are more likely, volcanic outgassing, recycling.
