Stratosphere
In Brühl et al. 2012, it is shown that COS is not a "global cooling gas". Carbonyl sulfide appears to be an important source of sulfur for the Earth's stratosphere. The persistent layer of stratospheric sulfate aerosols (the Junge layer) increases Earth's albedo. However, the global warming potential of COS offsets whatever cooling affect it contributes.
Krysztofiak et al. report total column and vertical profile measurements of COS in the stratosphere.
Krysztofiak, G., Té, Y., Catoire, V., Berthet, G., Toon, G.C., Jégou, F., Jeseck, P., and Robert, C.: Carbonyl sulphide (OCS) variability with latitude in the atmosphere, Atmosphere-Ocean, 53(1), 1-13, doi:10.1080/07055900.2013.876609, 2015.
Brühl, C., Lelieveld, J., Crutzen, P. J. and Tost, H.: The role of carbonyl sulphide as a source of stratospheric sulphate aerosol and its impact on climate, Atmos Chem Phys, 12(3), 1239–1253, doi:10.5194/acp-12-1239-2012, 2012.
Hattori, S., Schmidt, J. A., Mahler, D. W., Danielache, S. O., Johnson, M. S. and Yoshida, N.: Isotope Effect n the Carbonyl Sulfide Reaction with O(3P), J. Phys. Chem. A, 116(14), 3521–3526, doi:10.1021/jp2120884, 2012.
Leung, F.-Y. T., Colussi, A. J., Hoffmann, M. R. and Toon, G. C.: Isotopic fractionation of carbonyl sulfide in the atmosphere: Implications for the source of background stratospheric sulfate aerosol, Geophys. Res. Lett., 29(10), 112–1, doi:10.1029/2001GL013955, 2002.
Kjellström, E.: A Three-Dimensional Global Model Study of Carbonyl Sulfide in the Troposphere and the Lower Stratosphere, J. Atmospheric Chem., 29(2), 151–177, doi:10.1023/A:1005976511096, 1998.
Chin, M. and Davis, D. D.: A reanalysis of carbonyl sulfide as a source of stratospheric background sulfur aerosol, J. Geophys. Res., 100(D5), 8993–9005, 1995.
Chin, M. and Davis, D. D.: Global sources and sinks of OCS and CS2 and their distributions, Glob. Biogeochem. Cycles, 7(2), 321–337, doi:10.1029/93GB00568, 1993.
Crutzen, P. J.: The possible importance of CSO for the sulfate layer of the stratosphere, Geophys. Res. Lett., 3(2), 73–76, doi:197610.1029/GL003i002p00073, 1976.
Krysztofiak et al. report total column and vertical profile measurements of COS in the stratosphere.
Krysztofiak, G., Té, Y., Catoire, V., Berthet, G., Toon, G.C., Jégou, F., Jeseck, P., and Robert, C.: Carbonyl sulphide (OCS) variability with latitude in the atmosphere, Atmosphere-Ocean, 53(1), 1-13, doi:10.1080/07055900.2013.876609, 2015.
Brühl, C., Lelieveld, J., Crutzen, P. J. and Tost, H.: The role of carbonyl sulphide as a source of stratospheric sulphate aerosol and its impact on climate, Atmos Chem Phys, 12(3), 1239–1253, doi:10.5194/acp-12-1239-2012, 2012.
Hattori, S., Schmidt, J. A., Mahler, D. W., Danielache, S. O., Johnson, M. S. and Yoshida, N.: Isotope Effect n the Carbonyl Sulfide Reaction with O(3P), J. Phys. Chem. A, 116(14), 3521–3526, doi:10.1021/jp2120884, 2012.
Leung, F.-Y. T., Colussi, A. J., Hoffmann, M. R. and Toon, G. C.: Isotopic fractionation of carbonyl sulfide in the atmosphere: Implications for the source of background stratospheric sulfate aerosol, Geophys. Res. Lett., 29(10), 112–1, doi:10.1029/2001GL013955, 2002.
Kjellström, E.: A Three-Dimensional Global Model Study of Carbonyl Sulfide in the Troposphere and the Lower Stratosphere, J. Atmospheric Chem., 29(2), 151–177, doi:10.1023/A:1005976511096, 1998.
Chin, M. and Davis, D. D.: A reanalysis of carbonyl sulfide as a source of stratospheric background sulfur aerosol, J. Geophys. Res., 100(D5), 8993–9005, 1995.
Chin, M. and Davis, D. D.: Global sources and sinks of OCS and CS2 and their distributions, Glob. Biogeochem. Cycles, 7(2), 321–337, doi:10.1029/93GB00568, 1993.
Crutzen, P. J.: The possible importance of CSO for the sulfate layer of the stratosphere, Geophys. Res. Lett., 3(2), 73–76, doi:197610.1029/GL003i002p00073, 1976.