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Ice‐core evidence for a small solar‐source of atmospheric nitrate
Author(s) -
Palmer Anne S.,
Van Ommen Tas D.,
Curran Mark A. J.,
Morgan Vin
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl012207
Subject(s) - ice core , nitrate , atmospheric sciences , solar maximum , environmental science , geology , storm , precipitation , climatology , solar cycle , oceanography , solar wind , meteorology , geography , plasma , physics , chemistry , organic chemistry , quantum mechanics
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.