Abstract Of all tropospheric species, ozone ($ O_{3} $) comes closest to being naturally present at toxic levels. In addition, $ O_{3} $ controls the ultraviolet flux reaching the Earth's surface and affects the temperature of the surface and atmosphere. For these reasons, $ O_{3} $ was an important species of the paleoatmosphere. Surface and atmospheric levels of paleoatmospheric $ O_{3} $ were calculated using a detailed photochemical model, including the chemistry of the oxygen, nitrogen, and hydrogen species and the effects of vertical transport. Surface and tropospheric $ O_{3} $, as well as the total $ O_{3} $ column, were found to maximize for an atmospheric oxygen level of $ 10^{−1} $ present atmospheric level (PAL). Coupled photochemical/radiative-convective calculations indicate that the radiative effects of $ O_{3} $ corresponding to an oxygen level of $ 10^{−1} $ PAL resulted in a globally-averaged surface temperature increase of 4.5 K.
Ozone, ultraviolet flux and temperature of the paleoatmosphere
Origins of life ; 10 , 3
1980
Article (Journal)
English
Local classification TIB: | 535/3908/4290 | |
BKL: | 44.71 Verkehrsmedizin |
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