Constraining the atmospheric OCS budget from sulfur isotopes.

ABSTRACT: Carbonyl sulfide (OCS), the most abundant sulfur-containing gas in the atmosphere, is used as a proxy for photosynthesis rate estimation. However, a large missing source of atmospheric OCS has been inferred. Sulfur isotope measurements (³⁴S/³²S ratio and δ³⁴S) on OCS are a feasible tool to distinguish OCS sources from oceanic and anthropogenic emissions. Here we present the latitudinal (north-south) observations of OCS concentration and [Formula: see text]S within Japan. The observed [Formula: see text]S of OCS of 9.7 to 14.5‰ reflects source and sink effects. Particularly in winter, latitudinal decreases in [Formula: see text]S values of OCS were found to be correlated with increases in OCS concentrations, resulting an intercept of (4.7 ± 0.8)‰ in t

SUBMITTER: Hattori S 

PROVIDER: S-EPMC7456067 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature