Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa22a13s&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SA22A-13
Physics
0300 Atmospheric Composition And Structure, 0340 Middle Atmosphere--Composition And Chemistry, 0342 Middle Atmosphere--Energy Deposition
Scientific paper
We present a detailed overview of the latitudinal, longitudinal, and diurnal variability of nitric oxide in the 80-100 km region using data from both the UARS/HALOE instrument and the SNOE satellite. At 100 km, both HALOE and SNOE show a similar pattern of longitudinal asymmetries. The HALOE data extend into the mesosphere and we can investigate how deep into the atmosphere this pattern persists. A recognizable ``auroral-like'' oval is seen down to 80-85 km, but not lower. The latitude of maximum enhancement shifts to lower latitudes with decreasing altitude. This suggests that precipitation by higher energy particles occurs equatorward of the conventional aurora. If we assume that mesopause NO is a proxy for the ionization rate and that ionized aerosols are required to produce PMSE events, then this NO climatology can serve as a guide for preferred geographic locations to observe PMSE.
Bailey Stephen
Barth Charles A.
Siskind David E.
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