Radiative-photochemical models of the primitive terrestrial atmosphere

Details Radiative-photochemical models of the primitive terrestrial atmosphere Radiative-photochemical models of the primitive terrestrial atmosphere

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..785v&link_type=abstract

(IAU, IAMAP, and COSPAR, Joint Meeting on the Origin and Evolution of Planetary Atmospheres, Hamburg, West Germany, Aug. 17, 18,

Computer Science

4

Atmospheric Models, Atmospheric Temperature, Ozone, Photochemical Reactions, Primitive Earth Atmosphere, Atmospheric Attenuation, Atmospheric Chemistry, Atmospheric Composition, Carbon Dioxide Concentration, Convective Heat Transfer, Greenhouse Effect, Planetary Evolution, Radiative Heat Transfer, Solar Constant, Stratosphere, Surface Temperature, Water Vapor

Scientific paper

The vertical thermal structure of a primitive terrestrial atmosphere is investigated using a radiative-convective-photochemical model. The radiative code comprises the short-wave contribution from water vapor and ozone and the long-wave contribution from methane, carbon dioxide, water vapor, and ozone. Calculations for an oxygen level of 0.001 PAL and different CO2 levels show that the water vapor content, and consequently the odd hydrogen concentration, in the stratosphere is controlled by the temperature, which is strongly reduced from present values owing to the lower ozone content. As a result, depending on the assumed mechanism for controlling the H2O mixing ratio, an appreciable feedback is introduced on the ozone columnar density. The model is then used to parameterize the infrared outgoing flux as a function of the surface temperature to be used in a two-mode energy balance climate model.

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