Seasonal variations in the concentration of 10Be, Cl-, NO3-, SO42-, H2O2, 210Pb, 3H, mineral dust, and σ18O in Greenland snow

Beer, J.; Finkel, R.C.; Bonani, G.; Gäggeler, H.; Görlach, U.; Jacob, P.; Klockow, D.; Langway Jr., C.C.; Neftel, A.; Oeschger, H.; Schotterer, U.; Schwander, J.; Siegenthaler, U.; Suter, M.; Wagenbach, D.; Wölfli, W. (1991). Seasonal variations in the concentration of 10Be, Cl-, NO3-, SO42-, H2O2, 210Pb, 3H, mineral dust, and σ18O in Greenland snow. Atmospheric environment. Part A, General topics, 25(5-6), pp. 899-904. Elsevier 10.1016/0960-1686(91)90131-P

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A detailed snow pit study at Dye 3, South Greenland, has been carried out in order to investigate the seasonal variations of 10Be, Cl−, NO3−, SO42−, H2O2, 210Pb, 3H, Mn and σ18O. Special emphasis was placed on understanding the causes of 10Be variations because this isotope can be used to trace the history of solar activity. A sampling interval of 5 cm was chosen to assure a mean time resolution of about 20 samples per year for the period 1978–1983. Four different categories of seasonal variations were identified: strong summer peaks (σ18O, H2O2, 3H), weak bimodal peaks (NO3−, SO42−, conductivity, 10Be), a fall peak (210Pb) and a winter-spring peak (Cl−, Mn). Although we are still far from a detailed understanding of the mechanisms which control the measured compositions, there are indications that different processes dominate at different seasons. NO3−, SO42−, Mn and Cl− variations suggest that aerosol transport is most important during winter-spring. In summer-fall there seems to exist a second period of long range transport from low latitude continental areas resulting in enhanced concentrations of 210Pb, 10Be and SO42−.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics

UniBE Contributor:

Schotterer, Ulrich Hermann; Schwander, Jakob and Wagenbach, Dietmar

Subjects:

500 Science > 530 Physics

ISSN:

0960-1686

Publisher:

Elsevier

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

15 Sep 2021 11:04

Last Modified:

15 Sep 2021 11:04

Publisher DOI:

10.1016/0960-1686(91)90131-P

URI:

https://boris.unibe.ch/id/eprint/158869

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