Other
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa23a1904c&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA23A-1904
Other
[2415] Ionosphere / Equatorial Ionosphere, [2437] Ionosphere / Ionospheric Dynamics, [2447] Ionosphere / Modeling And Forecasting, [2467] Ionosphere / Plasma Temperature And Density
Scientific paper
We investigate the global OI 630.0 nm nightglow emission by analyzing the FORMOSAT-2/ISUAL Satellite imaging observations from 2007 to 2008. The results show that the midnight brightness often occurs near the geographic equator (equatorial brightness) and tends to appear in the summer hemisphere. And the cross magnetic-equator brightness (conjugate brightness) is observed in a tendency to show up in the winter hemisphere. On the other hand, the nightglow brightness tends to be weaker from May to July. The observations presented here are also compared with 630.0 nm emission formula which uses modeled ion and neutral particle density based on the Naval Research Laboratory SAMI2 model. We suggest that the global midnight brightness is contributed by several effects including the thermospheric midnight temperature maximum (MTM) effect, summer-to-winter neutral wind, tidal wind and the ionosphere anomaly. It is necessary to take account of the locations and seasons when explaining the mechanism of midnight brightness occurrence.
Chang Tsao
Chen Alfred B.
Chiang Cynthia
Hsu Rue-Ron
Huang Tao
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