Nitrate in polar ice

Wolff, Eric W.. 1995 Nitrate in polar ice. In: Delmas, Robert J., (ed.) Ice Core Studies of Global Biogeochemical Cycles. Berlin, Springer-Verlag, 195-224. (NATO ASI series, 30).

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Nitrate is one of the major impurities in polar snow, and is relatively easy to analyse. Large amounts of data therefore exist, including some from cores extending into the last glaciation. However, the data are not easy to interpret, and we do not yet have an adequate knowledge of even the present-day sources of nitrate to polar snow, nor of the deposition processes that control the concentrations seen. It is clear that anthropogenic pollution has increased the concentrations in Greenland snow by a factor of two in recent decades, and that no similar increase is seen in Antarctica. In pre-industrial Greenland ice, a clear seasonality allows annual layer counting. The sources in pre-industrial ice are probably lightning and/or the stratosphere, while soil exhalation may be an additional major component in Greenland. Whereas nitrate in Holocene ice is present as nitric acid, in ice from the last glaciation it is present as neutral salt, associated with terrestrial cations

Item Type: Publication - Book Section
Digital Object Identifier (DOI):
Programmes: BAS Programmes > Pre 2000 programme
ISBN: 9783642511745
NORA Subject Terms: Chemistry
Date made live: 17 Jan 2017 11:28 +0 (UTC)

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