Document Type

Article

Publication Title

Journal of Geophysical Research

Publisher

American Geophysical Union

Publication Date

3-20-1995

First Page

5113

Last Page

5121

Issue Number

D3

Volume Number

100

Abstract/ Summary

The relationships between the concentration and the flux of chemical species(Cl-, NO3-, SO42-, Na+, K+, NH4+, Mg2+, Ca2+) versus snow accumulation rate were examined at GISP2 and 20D in Greenland, Mount Logan from the St. Elias Range, Yukon Territory, Canada, and Sentik Glacier from the northwest end of the Zanskar Range in the Indian Himalayas. At all sites, only nitrate flux is significantly(α = 0.05) related to snow accumulation rate. Of all the chemical series, only nitrate concentration data are normally distributed. Therefore we suggest that nitrate concentration in snow is affected by postdeposition exchange with the atmosphere over a broad range of environmental conditions. The persistent summer maxima in nitrate observed in Greenland snow over the entire range of record studied( the last 800 years)m ay be mainly due to NOx released from peroxyacetyl nitrate by thermal decomposition in the presence of higher OH concentrations in summer. The late winter/early spring nitrate peak observed in modern Greenland snow may be related to the buildup of anthropogenically derived NOy in the Arctic troposphere during the long polar winter.

Citation/Publisher Attribution

Yang, Q., P. A. Mayewski, S. Whitlow, M. Twickler, M. Morrison, R. Talbot, J. Dibb, and E. Linder (1995), Global perspective of nitrate flux in ice cores, Journal of Geophysical Research, 100(D3), 5113–5121, doi:10.1029/94JD03115.

Publisher Statement

© Copyright 1995 by the American Geophysical Union

DOI

10.1029/94JD03115

Version

publisher's version of the published document