 |
| Titel |
Mesospheric temperatures from observations of the hydroxyl (6–2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements |
| VerfasserIn |
J. L. Innis, F. A. Phillips, G. B. Burns, P. A. Greet, W. J. R. French, P. L. Dyson |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 19, no. 3 ; Nr. 19, no. 3, S.359-365 |
| Datensatznummer |
250014225
|
| Publikation (Nr.) |
 copernicus.org/angeo-19-359-2001.pdf |
|
|
|
|
|
| Zusammenfassung |
We present observations of
the hydroxyl (6–2) airglow lines from ~ 87 km altitude obtained at Davis
station, Antarctica, in the austral winter of 1999. Nine nights of observations
were made of the P-branch near λ840 nm with a Czerny-Turner
scanning spectrometer (CTS); at the same time, high-resolution Fabry-Perot
Spectrometer (FPS) spectra were collected of the Q1(1) doublet at
λ834 nm. Rotational temperatures were determined from the CTS
observations, while Doppler temperatures were derived from the line-widths of
the FPS Q1(1) spectra. Absolute temperatures determined by these
methods are uncertain by ~ 2 and ~ 20 K, respectively. For the comparison we set
the value of the reflective finesse of the FPS at λ834 nm so the
mean FPS temperature from one night of simultaneous data was equal to that from
the CTS, and then looked at the measured variations in each data set for the
other eight nights. Both instruments show the upper mesosphere temperature to
vary in a similar manner to within the observational errors of the measurements,
implying an equivalence of the rotational and Doppler temperatures. We believe
that this is the first published simultaneous, same-site, comparison of
rotational and Doppler temperatures from the OH emission.
Key words. Atmospheric composition
and structure (airglow and aurora; pressure density and temperature; instruments
and techniques) |
| |
|
| Teil von |
|
|
|
|
|
|
|
|