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- W2051215006 abstract "Photostimulated oxidation weathering irreversibly removes both oxygen and hydrogen from the atmosphere at a rate of 108 to 1011 cm−2sec−1. This corresponds to a net loss of 1025 to 1028 molecules cm−2 (102 to 105 g cm−2 of H2O, assuming a uniform rate over geologic time. Additional H2O is removed through hydration of Fe2O3 and clay minerals, but the loss is reversible and the extent of regolith storage is uncertain. CO2 is irreversibly removed from the atmosphere through the formation of CaCO3 at a rate of 107−1010cm−2sec−1. Over geologic time this corresponds to a net loss of 1024−1027 molecules cm−2 (101−104g cm−2) of CO2. Previously, it was proposed that exospheric escape was the principal irreversible volatile sink, amounting to only 102g cm−2 of H2O and 100g cm−2 of CO2 over geologic time. A recent tentative identification of abundant argon on Mars suggests that the planet may have degassed up to 105g cm−2 of H2O and 104g cm−2 of CO2. If the amounts of H2O and CO2 removed by photostimulated oxidation are close to the upper limits proposed here, it is possible that chemical weathering may have had a major effect on limiting the supply of H2O and CO2 trapped in the regolith and polar caps." @default.
- W2051215006 created "2016-06-24" @default.
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- W2051215006 date "1976-06-01" @default.
- W2051215006 modified "2023-10-14" @default.
- W2051215006 title "Mars: Chemical weathering as a massive volatile sink" @default.
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- W2051215006 doi "https://doi.org/10.1016/0019-1035(76)90033-6" @default.
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