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| Titel |
The emission of oxygen green line and density of O atom determined by using ISUAL and SABER measurements |
| VerfasserIn |
H. Gao, J.-B. Nee, J. Xu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 30, no. 4 ; Nr. 30, no. 4 (2012-04-19), S.695-701 |
| Datensatznummer |
250017213
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| Publikation (Nr.) |
 copernicus.org/angeo-30-695-2012.pdf |
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| Zusammenfassung |
| Emissions of the 557.7 nm green line airglow observed by the ISUAL (Imager
of Sprites and Upper Atmospheric Lightning) instrument on board the
FORMOSAT-2 satellite in May and November 2008 are studied here to derive the
density distributions of the atomic oxygen by using atmospheric parameters
from MSISE-00 model and TIMED (Thermosphere Ionosphere Mesosphere Energetics
and Dynamics)/SABER (Sounding of the Atmosphere using Broadband Emission
Radiometry) measurements. The May observations were made in 10 days from a
fixed orbit of longitude (100° E) with the results showing emission rate
and O atom density both peaked at heights of about 90 km over 10° to
20° latitudes in the Northern Hemisphere (NH). In the Southern
Hemisphere (SH), the emission rate and density of O atom are both low
compared with those in NH. In November, the observations were made as the
satellite traveled over all 14 orbits around the earth, covering all
longitudes and latitudes of 25° S–45° N. Strong peaks of emission
rates and O atoms are found at heights of about 95 km in the mid-latitudes
in both hemispheres. In the equator, the airglow layer has a weaker emission
rate but with higher altitude compared with those of mid-latitudes. In the
lower and upper mesosphere at heights below 85 km and above 105 km, there
are more O atoms in the equatorial regions than in the mid-latitudes. And
there is a good correlation between the O atom and the temperature
structure. A comparison with O atom distribution derived from OH airglow
observed by TIMED/SABER at about the same time shows similar results. |
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