SO2 Oxidation Kinetics Leave a Consistent Isotopic Imprint on Volcanic Ice Core Sulfate. Issue 17 (4th September 2018)

• Record Type: Journal Article
• Authors: Gautier, Elsa; Savarino, Joel; Erbland, Joseph; Farquhar, James
• Is Part Of: Journal of geophysical research. Volume 123:Issue 17(2018)
• Page Start: 9801
• Page End: 9812
• Publication Date: 2018-09-04
• Subjects: Antarctica -- sulfur mass‐independent isotope fractionation -- volcanic eruption -- ice core; Atmospheric physics -- Periodicals; Geophysics -- Periodicals; 551.5
• DOI: 10.1029/2018JD028456
• Languages: English
• ISSNs: 2169-897X

Abstract

Key Points: Aerosols are physically separated from the SO2 pool during the oxidation process, and they preserve the isotopic signature during transport and deposition Volcanic sulfate of stratospheric origin scatter on Δ 33 S versus Δ 36 S and δ 34 S versus Δ 33 S slopes of −1.56 (1 σ = 0.25) and 0.09 (1 σ = 0.02), respectively The mechanism generating S‐MIF in stratospheric sulfate remains uncertain; a combination of several mechanisms is needed to reproduce the observed signature