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Vertical profile measurements of carbonylsulfide in the stratosphere
Author(s) -
Engel A.,
Schmidt U.
Publication year - 1994
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 - 10.1029/94gl01461
Subject(s) - stratosphere , aerosol , atmospheric sciences , volcano , altitude (triangle) , mixing ratio , environmental science , sink (geography) , sulfuric acid , meteorology , geology , chemistry , physics , inorganic chemistry , geometry , mathematics , cartography , seismology , geography
Measurements of COS in the altitude region between 17 and 30 km were made, using a whole air sampling technique with subsequent gaschromatographic analysis. The data show COS mixing‐ratios from about 200 pptv at 17 km decreasing to less then 20 pptv at about 28 km. This behaviour is in qualitative agreement with the model‐calculations by Turco et al. (1981). From the correlation with CFCl 3 and CF 2 Cl 2 the lifetime with respect to removal in the stratosphere is calculated to be 69±28 years. This corresponds to a sink of between 47 and 112 * 10 9 g of COS per year in the stratosphere. Comparing this number to the estimated fluxes needed to sustain the background sulfuric‐acid aerosol confirms that most of the non‐volcanic aerosol is produced by the oxidation of COS in the stratosphere.