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

journal contribution
posted on 2023-05-16, 13:20 authored by Palmer, AS, Tasman van OmmenTasman van Ommen, Mark Curran, Morgan, VI
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.

History

Publication title

Geophysical Research Letters

Volume

28

Issue

10

Pagination

1953-1956

ISSN

0094-8276

Department/School

Institute for Marine and Antarctic Studies

Publisher

American Geophysical Union

Place of publication

Washington

Repository Status

  • Restricted

Socio-economic Objectives

Other environmental management not elsewhere classified

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