Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements
International audience 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 ?840 nm with a Czerny-Turner scanning spectrometer (CTS); at the s...
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ftccsdartic:oai:HAL:hal-00316777v1 2023-11-12T04:08:21+01:00 Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements Innis, J. L. Phillips, F. A. Burns, G. B. Greet, P. A. French, W. J. R. Dyson, P. L. Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy Department of Physics La Trobe University Melbourne 2001 https://hal.science/hal-00316777 https://hal.science/hal-00316777/document https://hal.science/hal-00316777/file/angeo-19-359-2001.pdf en eng HAL CCSD European Geosciences Union hal-00316777 https://hal.science/hal-00316777 https://hal.science/hal-00316777/document https://hal.science/hal-00316777/file/angeo-19-359-2001.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316777 Annales Geophysicae, 2001, 19 (3), pp.359-365 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2001 ftccsdartic 2023-10-21T23:08:10Z International audience 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 ?840 nm with a Czerny-Turner scanning spectrometer (CTS); at the same time, high-resolution Fabry-Perot Spectrometer (FPS) spectra were collected of the Q 1 (1) doublet at ?834 nm. Rotational temperatures were determined from the CTS observations, while Doppler temperatures were derived from the line-widths of the FPS Q 1 (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 ?834 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) Article in Journal/Newspaper Antarc* Antarctica Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Austral Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Innis, J. L. Phillips, F. A. Burns, G. B. Greet, P. A. French, W. J. R. Dyson, P. L. Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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 ?840 nm with a Czerny-Turner scanning spectrometer (CTS); at the same time, high-resolution Fabry-Perot Spectrometer (FPS) spectra were collected of the Q 1 (1) doublet at ?834 nm. Rotational temperatures were determined from the CTS observations, while Doppler temperatures were derived from the line-widths of the FPS Q 1 (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 ?834 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) |
author2 |
Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy Department of Physics La Trobe University Melbourne |
format |
Article in Journal/Newspaper |
author |
Innis, J. L. Phillips, F. A. Burns, G. B. Greet, P. A. French, W. J. R. Dyson, P. L. |
author_facet |
Innis, J. L. Phillips, F. A. Burns, G. B. Greet, P. A. French, W. J. R. Dyson, P. L. |
author_sort |
Innis, J. L. |
title |
Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements |
title_short |
Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements |
title_full |
Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements |
title_fullStr |
Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements |
title_full_unstemmed |
Mesospheric temperatures from observations of the hydroxyl (6?2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements |
title_sort |
mesospheric temperatures from observations of the hydroxyl (6?2) emission above davis, antarctica: a comparison of rotational and doppler measurements |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.science/hal-00316777 https://hal.science/hal-00316777/document https://hal.science/hal-00316777/file/angeo-19-359-2001.pdf |
long_lat |
ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) |
geographic |
Austral Davis Station Davis-Station |
geographic_facet |
Austral Davis Station Davis-Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316777 Annales Geophysicae, 2001, 19 (3), pp.359-365 |
op_relation |
hal-00316777 https://hal.science/hal-00316777 https://hal.science/hal-00316777/document https://hal.science/hal-00316777/file/angeo-19-359-2001.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782328675082960896 |