Large perturbations of ammonium and organic acids content in the Summit-Greenland ice core - Fingerprint from forest fires?

Details Large perturbations of ammonium and organic acids content in the Summit-Greenland ice core - Fingerprint from forest fires? Large perturbations of ammonium and organic acids content in the Summit-Greenland ice core - Fingerprint from forest fires?

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19..473l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, March 3, 1992, p. 473-475. Research supported by CNRS.

Physics

57

Atmospheric Chemistry, Atmospheric Composition, Forest Fires, Land Ice, Paleoclimatology, Acids, Ammonium Compounds, Core Sampling, Greenland, Organic Compounds

Scientific paper

Polar ice cores provide a unique record of precipitation whose chemistry reflects the atmospheric composition at the time of deposition. The analysis of such ice samples therefore allows an estimate to be made of the concentration of atmospheric impurities in the past. During the first season of the deep drill operation (GRIP) at Summit, Central Greenland continuous ammonium (NH4+) measurements were performed between 100 and 600 m depth covering the time period from 330 to 2500 years B.P. The NH4(+) concentrations show seasonal variations between 1-20 ng/g with some sporadic high values up to 600 ng/g in narrow layers. The chemical fingerprint points to biomass burning causing the high ammonium peaks.

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