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Average concentrations of OH in the troposphere, and the budgets of CH 4, CO, H 2 and CH 3CCl 3
Author(s) -
Crutzen Paul J.,
Fishman Jack
Publication year - 1977
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl004i008p00321
Subject(s) - troposphere , stratosphere , northern hemisphere , atmosphere (unit) , sink (geography) , atmospheric sciences , ozone , environmental science , tropospheric ozone , chemistry , environmental chemistry , climatology , meteorology , geology , physics , organic chemistry , cartography , geography
An average tropospheric OH concentration in the Northern Hemisphere of about 3 × 10 5 cm −3 is not in disagreement with present photokinetic information. This has important implications for the tropospheric budgets of CH 4, CO, H 2 and CH 3CCl 3. Present concentrations of CH 4 and H 2 in the atmosphere may be substantially larger than those prevailing during the pre‐industrial era, implying also an increase in H 2O concentrations and a decrease in ozone concentrations in the upper stratosphere. Accepting this estimate of an OH concentration and an important CO sink at the ground ( Seiler , 1974), there must be additional sources of CO than considered in presently evaluated budgets.