Sulfate and nitrate firn concentrations on the Greenland ice sheet, supplement to: Fischer, Hubertus; Wagenbach, Dietmar; Kipfstuhl, Sepp (1998): Sulfate and nitrate firn concentrations on the Greenland ice sheet: 2. Temporal anthropogenic deposition changes. Journal of Geophysical Research: Atmospheres, 103(D17), 21935-21942

Hubertus Fischer, Dietmar Wagenbach & Sepp Kipfstuhl
Intercomparison of three new chemical ice core records from northern Greenland (covering the time span from approximately 1500 A.D. to present) with previously published records for southern and central Greenland reveals a uniform timing of anthropogenic changes in sulfate and nitrate firn concentrations over the entire ice sheet. The anthropogenic sulfate increase started around 1890, was interrupted by a transient decrease in the 1930s, and has resumed a major increase since 1950. Since the late...
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