Global measurements of atmospheric carbonyl sulfide (OCS), OC34S and O13CS. (November 2019)

• Record Type: Journal Article
• Authors: Yousefi, Mahdi; Bernath, Peter F; Boone, Chris D; Toon, Geoffrey C
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 238(2019)
• Publication Date: 2019-11
• Subjects: OCS -- Isotopologue enrichment -- Stratospheric sulfate aerosol -- Remote sensing; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2019.06.033
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: Measuring the global distribution of OCS, OC 34 S and O 13 CS. OCS, OC 34 S and O 13 CS atmospheric fractionation. OCS contribution to the background Stratospheric Sulfate Aerosol. Abstract: Near global 85 ∘ S–85 ∘ N atmospheric measurement of carbonyl sulfide (OCS), including the minor OC 34 S and O 13 CS 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, OC 34 S and O 13 CS from 8 km in troposphere up to 31 km in the stratosphere. The global zonal and seasonal distributions of OCS isotopologues were studied. OCS observations made with the MkIV balloon-borne Fourier transform spectrometer (FTS) are also presented. The results indicate a slight enrichment of OC 34 S and a significant enrichment of O 13 CS as the altitude increases. The contribution of OCS to the background Stratospheric Sulfate Aerosol Layer (SSA) is discussed and ACE-FTS data indicate that OCS is a major contributor.