Mesospheric temperatures from observations of the hydroxyl (6-2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements
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-resoluti...
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ftunivwollongong:oai:ro.uow.edu.au:smhpapers-2910 2023-05-15T13:53:47+02:00 Mesospheric temperatures from observations of the hydroxyl (6-2) emission above Davis, Antarctica: A comparison of rotational and Doppler measurements Innis, J L Phillips, Frances Burns, G B Greet, P A French, W J R Dyson, P L 2001-01-01T08:00:00Z application/pdf https://ro.uow.edu.au/smhpapers/1892 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2910&context=smhpapers unknown Research Online https://ro.uow.edu.au/smhpapers/1892 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2910&context=smhpapers Faculty of Science, Medicine and Health - Papers: part A davis comparison mesospheric doppler measurements hydroxyl 6 2 emission above antarctica rotational temperatures observations GeoQuest Medicine and Health Sciences Social and Behavioral Sciences article 2001 ftunivwollongong 2020-02-25T10:58:47Z 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. Article in Journal/Newspaper Antarc* Antarctica University of Wollongong, Australia: Research Online 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 |
University of Wollongong, Australia: Research Online |
op_collection_id |
ftunivwollongong |
language |
unknown |
topic |
davis comparison mesospheric doppler measurements hydroxyl 6 2 emission above antarctica rotational temperatures observations GeoQuest Medicine and Health Sciences Social and Behavioral Sciences |
spellingShingle |
davis comparison mesospheric doppler measurements hydroxyl 6 2 emission above antarctica rotational temperatures observations GeoQuest Medicine and Health Sciences Social and Behavioral Sciences Innis, J L Phillips, Frances 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 |
davis comparison mesospheric doppler measurements hydroxyl 6 2 emission above antarctica rotational temperatures observations GeoQuest Medicine and Health Sciences Social and Behavioral Sciences |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Innis, J L Phillips, Frances Burns, G B Greet, P A French, W J R Dyson, P L |
author_facet |
Innis, J L Phillips, Frances 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 |
Research Online |
publishDate |
2001 |
url |
https://ro.uow.edu.au/smhpapers/1892 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2910&context=smhpapers |
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 |
Faculty of Science, Medicine and Health - Papers: part A |
op_relation |
https://ro.uow.edu.au/smhpapers/1892 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2910&context=smhpapers |
_version_ |
1766259216663707648 |