Interhemispheric observations of impulsive nitrate enhancements associated with the four large ground-level solar cosmic ray events (1940–1950)
| Autor: | D. F. Smart, Harlan E. Spence, M.A. Shea, Larry Kepko |
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| Rok vydání: | 2009 |
| Předmět: |
Solar proton
Physics Atmospheric Science integumentary system Cosmic ray Atmospheric sciences Atmosphere Ground level chemistry.chemical_compound Geophysics Nitrate chemistry Space and Planetary Science Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics Polar Astrophysics::Earth and Planetary Astrophysics Event (particle physics) Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Journal of Atmospheric and Solar-Terrestrial Physics. 71:1840-1845 |
| ISSN: | 1364-6826 |
| DOI: | 10.1016/j.jastp.2009.07.002 |
| Popis: | We present a compelling similarity of impulsive nitrate enhancements observed in polar ice from the northern and southern hemispheres. This analysis concentrates on the period 1940–1950, during which time the first four recorded solar cosmic ray ground-level enhancements (GLEs) occurred. GLEs are strong solar proton events. We show that large and sudden enhancements in the nitrate records from both hemispheres were observed within weeks following the recorded solar cosmic ray ground-level event. The observation of impulsive nitrate enhancements simultaneously in both hemispheres shortly after a large fluence solar proton event is strong evidence in support of a causal connection and argues strongly for rapid transport of atmospheric nitrates generated through the polar atmosphere by energetic solar proton events. |
| Databáze: | OpenAIRE |
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