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The stratospheric sulfur burden: an assessment based on gas and particle phase measurements

Deshler, T.; Kloss, C.; Thomason, L.; Höpfner, M.; Martinsson, B.; Kremser, S.; Bourassa, A.; Glatthor, N.; Barnes, J.; Hobe, M. von; Hermann, M.; Jones, N.; Trickl, T.; Notholt, J.; Wilson, J.; Palm, M.; Smale, D.; Hannigan, J.; Gunther, A.; Liley, B.; ... mehr

Abstract (englisch):
Sulfur, by far the most common element found in stratospheric aerosol, appears in the particles due to the low vapor pressure of sulfuric acid which leads to quick condensation on pre-existing particles or homogeneous nucleation in regions of high sulfuric acid concentrations. The sulfuric acid arises through several oxidations of sulfur dioxide (SO2), ultimately by OH. Due to abundance of water, compared to sulfuric acid, the particles quickly take on water and grow. The SO2 appears in the stratosphere either through direct injection, or the photolysis and subsequent oxidation of carbonyl sulfide (OCS). Both SO2 and OCS are transported into the stratosphere through the upwelling caused by tropical convection, the Brewer Dobson circulation, and sporadic volcanic eruptions. Volcanic eruptions are particularly important for SO2. Due to the abundance of sulfur in stratospheric aerosol and to the reliance of that aerosol on gas phase sources of sulfur, an estimate of the sulfur burden from both phases is important to assess stratospheric aerosol and requires profile measurements of stratospheric aerosol, SO2 and OCS. Regular profile measurements of particle phase sulfur began in the 1970s at selected locations using lidar and balloon-borne instruments. ... mehr

Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Vortrag
Publikationsjahr 2018
Sprache Englisch
Identifikator KITopen-ID: 1000104503
HGF-Programm 12.03.01 (POF III, LK 01)
Long term observations of tropospheric
Veranstaltung AGU Chapman Conference (2018), Puerto de la Cruz, Spanien, 18.03.2018 – 23.03.2018
Schlagwörter stratospheric sulfur
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