Ice-core evidence for a small solar-source of atmospheric nitrate

Details Ice-core evidence for a small solar-source of atmospheric nitrate Ice-core evidence for a small solar-source of atmospheric nitrate

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1953p&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 10, p. 1953-1956

Physics

10

Atmospheric Composition And Structure: Constituent Sources And Sinks, Global Change: Atmosphere, Global Change: Solar Variability, Hydrology: Glaciology

Scientific paper

A precision-dated ice-core nitrate record from Law Dome, coastal East Antarctica is compared to the timing of known solar proton events and geomagnetic storms over the period 1888 to 1995. We find statistical evidence for a significant (P<0.03) but small elevation in mean nitrate concentrations following the solar events (~11% over the 12 months beginning 3 months post-event). While some solar events are identifiable in the nitrate record, most are not distinguishable from the background noisy signal (which has numerous large peaks), and some solar events show no nitrate elevation above even mean levels.

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