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| Titel |
Inferring hydroxyl layer peak heights from ground-based measurements of OH(6-2) band integrated emission rate at Longyearbyen (78° N, 16° E) |
| VerfasserIn |
F. J. Mulligan, M. E. Dyrland, F. Sigernes, C. S. Deehr |
| 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 ; 27, no. 11 ; Nr. 27, no. 11 (2009-11-06), S.4197-4205 |
| Datensatznummer |
250016703
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| Publikation (Nr.) |
 copernicus.org/angeo-27-4197-2009.pdf |
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| Zusammenfassung |
| Measurements of hydroxyl nightglow emissions over Longyearbyen (78° N,
16° E) recorded simultaneously by the SABER instrument onboard the TIMED
satellite and a ground-based Ebert-Fastie spectrometer have been used to
derive an empirical formula for the height of the OH layer as a function of
the integrated emission rate (IER). Altitude profiles of the OH volume
emission rate (VER) derived from SABER observations over a period of more
than six years provided a relation between the height of the OH layer peak
and the integrated emission rate following the procedure described by Liu
and Shepherd (2006). An extended period of overlap of SABER and ground-based
spectrometer measurements of OH(6-2) IER during the 2003–2004 winter season
allowed us to express ground-based IER values in terms of their satellite
equivalents. The combination of these two formulae provided a method for
inferring an altitude of the OH emission layer over Longyearbyen from
ground-based measurements alone. Such a method is required when SABER is in
a southward looking yaw cycle. In the SABER data for the period 2002–2008,
the peak altitude of the OH layer ranged from a minimum near 76 km to a
maximum near 90 km. The uncertainty in the inferred altitude of the peak
emission, which includes a contribution for atmospheric extinction, was
estimated to be ±2.7 km and is comparable with the ±2.6 km value
quoted for the nominal altitude (87 km) of the OH layer. Longer periods of
overlap of satellite and ground-based measurements together with
simultaneous on-site measurements of atmospheric extinction could reduce the
uncertainty to approximately 2 km. |
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