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- W3163334277 abstract "<p>Carbonyl sulfide (OCS), the most abundant sulfur-containing gas in the ambient atmosphere, possesses great potential for tracer of the carbon cycle. Sulfur isotopic composition (<sup>34</sup>S/<sup>32</sup>S ratio, &#948;<sup>34</sup>S) on OCS is a feasible tool to evaluate the OCS budget. We applied the sulfur isotope measurement for the tropospheric OCS cycle and distinguished OCS sources from oceanic and anthropogenic emissions.</p><p>&#160;</p><p>Here, we present a developed measurement system of &#948;<sup>34</sup>S of OCS and the result of latitudinal (north-south) observations of OCS within Japan using the method. The OCS sampling system was carried to three sampling sites in Japan: Miyakojima (24&#176;8&#8217;N, 125&#176;3&#8217;E), Yokohama (35&#176;5&#8217;N, 139&#176;5&#8217;E), and Otaru (43&#176;1&#8217;N, 141&#176;2&#8217;E). The observed &#948;<sup>34</sup>Sof OCS ranging from 9.7 to 14.5&#8240; reflects the tropospheric OCS cycle. Particularly in winter, latitudinal decreases in &#948;<sup>34</sup>Svalues were found to be correlated with increases in OCS concentrations, resulting in an intercept of (4.7 &#177; 0.8)&#8240; in the Keeling plot approach. This trend suggests the transport of anthropogenic OCS emissions from the Asian continent to the western Pacific by the Asian monsoon outflow.</p><p>&#160;</p><p>The estimated background &#948;<sup>34</sup>S of OCS in eastern Asia is consistent with the &#948;<sup>34</sup>S of OCS previously reported in Israel and the Canary Islands, suggesting that the background &#948;<sup>34</sup>S of OCS in the Northern Hemisphere ranges from 12.0 to 13.5&#8240;. Our constructed sulfur isotopic mass balance of OCS revealed that anthropogenic sources, not merely oceanic sources, account for much of the missing source of atmospheric OCS. This sulfur isotopic constraint on atmospheric OCS is an important step together with isotopic characterizations and analysis using a chemical transport model, will enable detailed quantitative OCS budget and estimation of gross primary production.</p>" @default.
- W3163334277 created "2021-05-24" @default.
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- W3163334277 date "2021-03-03" @default.
- W3163334277 modified "2023-10-18" @default.
- W3163334277 title "Isotopic constraints on the tropospheric carbonyl sulfide budget" @default.
- W3163334277 doi "https://doi.org/10.5194/egusphere-egu21-2214" @default.
- W3163334277 hasPublicationYear "2021" @default.
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