ChemInform Abstract: STUDY OF SULFUR-CONTAINING MOLECULES IN THE EUV REGION. II. PHOTOABSORPTION CROSS SECTION OF CARBONYL SULFIDE

1982 ◽  
Vol 13 (28) ◽  
Author(s):  
C. Y. R. WU ◽  
D. L. JUDGE
Keyword(s):  
Cross Section ◽  
Carbonyl Sulfide ◽  
Photoabsorption Cross Section ◽  
Region Ii ◽  
Sulfur Containing

The absolute N2 K-photoabsorption cross section up to hω = 450 eV

1978 ◽  
Vol 58 (2) ◽  
pp. 263-266 ◽  
Author(s):  
H. Petersen ◽  
A. Bianconi ◽  
F.C. Brown ◽  
R.Z. Bachrach
Keyword(s):  
Cross Section ◽  
Photoabsorption Cross Section ◽  
The Absolute

Isotopic constraints on the tropospheric carbonyl sulfide budget

2021 ◽  
Author(s):  
Kazuki Kamezaki ◽  
Shohei Hattori ◽  
Naohiro Yoshida
Keyword(s):  
Transport Model ◽  
Gross Primary Production ◽  
Carbonyl Sulfide ◽  
Anthropogenic Sources ◽  
Ambient Atmosphere ◽  
Chemical Transport Model ◽  
Sampling System ◽  
Keeling Plot ◽  
The Western Pacific ◽  
Sulfur Containing

<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, δ<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> </p><p>Here, we present a developed measurement system of δ<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°8’N, 125°3’E), Yokohama (35°5’N, 139°5’E), and Otaru (43°1’N, 141°2’E). The observed δ<sup>34</sup>Sof OCS ranging from 9.7 to 14.5‰ reflects the tropospheric OCS cycle. Particularly in winter, latitudinal decreases in δ<sup>34</sup>Svalues were found to be correlated with increases in OCS concentrations, resulting in an intercept of (4.7 ± 0.8)‰ 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> </p><p>The estimated background δ<sup>34</sup>S of OCS in eastern Asia is consistent with the δ<sup>34</sup>S of OCS previously reported in Israel and the Canary Islands, suggesting that the background δ<sup>34</sup>S of OCS in the Northern Hemisphere ranges from 12.0 to 13.5‰. 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>

scholarly journals High-resolution photoabsorption cross-section measurements of SO2at 198 K from 213 to 325 nm

2011 ◽  
Vol 116 (E3) ◽  
Author(s):  
D. Blackie ◽  
R. Blackwell-Whitehead ◽  
G. Stark ◽  
J. C. Pickering ◽  
P. L. Smith ◽  
...  
Keyword(s):  
High Resolution ◽  
Cross Section ◽  
Photoabsorption Cross Section

Electronic Spectra of Carbonyl Sulfide Sulfur Isotopologues

2004 ◽  
Vol 1 (1) ◽  
pp. 44 ◽  
Author(s):  
Agustín J. Colussi ◽  
Fok-Yan Leung ◽  
Michael R. Hoffmann
Keyword(s):  
Electronic Spectra ◽  
Isotope Effects ◽  
Carbonyl Sulfide ◽  
Cloud Formation ◽  
Recent Analysis ◽  
Ultraviolet Absorption Spectrum ◽  
Cirrus Cloud ◽  
Fundamental Information ◽  
Atmospheric Processing ◽  
Sulfur Containing

Environmental Context.Sulfate aerosols have been linked with ozone-depleting reactions, and their influence on cirrus cloud formation may affect climate. One source of sulfate aerosols is sulfur-containing gases such as carbonyl sulfide, which can rise up to the statosphere and become transformed into sulfate under the prevailing sunlight, but the importance and details of the phenomena involved are poorly understood. With a view to providing the fundamental information required to analyze the atmospheric processing of carbonyl sulfide, this paper reports the sulfur isotope effects on its ultraviolet absorption spectrum. Abstract.Carbonyl sulfide (OCS), a relatively inert tropospheric species that photolyzes into CO + S upon reaching the stratosphere, is deemed a significant contributor to background sulfate aerosol. A recent analysis of atmospheric infrared transmittance data has revealed that OC34S is preferentially depleted above ~10 km. We now report that the OC34S absorption band between 200 ≤ λ [nm] ≤ 260 at 298 K is broader and more intense than its OC32S counterpart. This finding is consistent with the faster photolysis of OC34S, and with a time-dependent formulation of electronic spectra. Since OCS photolysis in the lower stratosphere occurs in a spectral range in which its absorption cross-section is unaffected by temperature, we are able to estimate a 34S-enrichment factor <34ϵ> ~ (67 ± 7)‰ for this process that is commensurate with the value previously inferred from OC34S/OC32S ratio versus altitude profiles.

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