Global Measurements of Atmospheric OCS, OC34S and O13CS
College of Sciences
Global atmospheric measurement of carbonyl sulfide (OCS), including the minor OC34S and O13CS isotopologues, were made by the Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS) in low Earth orbit. ACE-FTS data provide volume mixing ratio (VMR) profiles of OCS, OC34S and O13CS from 8 km in troposphere up to 31 km in the stratosphere. The global zonal and seasonal distributions of OCS isotopologues were studied. The results indicate a slight enrichment of OC34S and a significant enrichment of O13CS as the altitude increases. OCS may be an important contributor to the background Stratospheric Sulfate Aerosol (SSA) that cools the climate by increasing the Earth’s albedo. There are discussions in the literature about the extent of the contribution of OCS to the SSA. ACE-FTS data indicate that OCS is a major contributor.
Yousefi, Mahdi and Bernath, Peter F., "Global Measurements of Atmospheric OCS, OC34S and O13CS" (2019). College of Sciences Posters. 28.