ROSES ID: NRA-00-OSS-01 Selection Year: 2001
Program Element: Independent Investigation: LWS
Principal Investigator: Margaret Ann Shea
Affiliation(s): University of Alabama, Huntsville
Summary:
The objective is to ascertain from historical data the probability of major solar-terrestrial events that had a significant proton flux for the past 150 years. Our most recent analysis supports the supposition that major solar proton fluence events (those with >30 MeV omni-directional fluence exceeding 109 cm-2) generate sufficient NOy in the upper atmosphere so that when the polar vortex is operating the resultant NOy is deposited in the polar snows. Magnetic records exist indicating major solar-terrestrial activity for the past 150 years. We propose to analyze the nitrate records to compare the NOy deposition in the years when major magnetic storms have occurred against the nitrate record in polar snows deposited within a few months of each event. The results of this study are appropriate to three of the four LWS NASA Strategic Enterprises.Performance Year | Reference | Investigation Type | Actions |
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1 | McCracken, K. G.; Dreschhoff, G. A. M.; Zeller, E. ... | not set | |
1 | Shea, M. A.; Smart, D. F.; (2004), The Use of Geophysic... | not set |
Performance Year | Reference | Actions |
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1 | Shea, M. A.; Smart, D. F.; (2004), Ice Cores, Historic ... |