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The influence of the several very large solar proton events in years 2000-2003 on the neutral middle atmosphere
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ko, Malcolm K. W. Fleming, Eric L. Anderson, John Weisenstein, Debra K. Russell, James M. Sinnhuber, Miriam Deland, Matthew T. Labow, Gordon J. Jackman, Charles H. |
| Copyright Year | 2004 |
| Description | Solar proton events (SPEs) are known to have caused changes in constituents in the Earth's polar neutral middle atmosphere. The past four years, 2000-2003, have been replete with SPEs and huge fluxes of high energy protons occurred in July and November 2000, September and November 2001, and October 2003. The highly energetic protons produce ionizations, excitations, dissociations, and dissociative ionizations of the background constituents, which lead to the production of HOx (H, OH, HO2) and NOy (N, NO, NO2, NO3, N2O5, HNO3, HO2NO2, ClONO2, BrONO2). The HOx increases lead to short-lived ozone decreases in the polar mesosphere and upper stratosphere due to the short lifetimes of the HOx constituents. Large mesospheric ozone depletions (>70%) due to the HOx enhancements were observed and modeled as a result of the very large July 2000 SPE. The NOy increases lead to long-lived stratospheric ozone changes because of the long lifetime of the NOy family in this region. Polar total ozone depletions >1% were simulated in both hemispheres for extended periods of time (several months) as a result of the NOy enhancements due to the very large SPEs. |
| File Size | 659306 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040171400 |
| Archival Resource Key | ark:/13960/t11p3247d |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Atmospheric Composition Middle Atmosphere Hydrogen Compounds Nitrogen Oxides Ozone Solar Terrestrial Interactions Solar Protons Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
