Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride
We determine subsidence in the Arctic stratospheric vortex from measurements of the column density of hydrogen fluoride, using a rotational line in thermal emission. The data were obtained with the far-infrared spectrometer on board the NASA DC-8 aircraft during the Arctic Airborne Stratospheric Exp...
Published in: | Journal of Geophysical Research |
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American Geophysical Union
1995
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ftharvardudash:oai:dash.harvard.edu:1/41467438 2023-05-15T14:26:28+02:00 Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride Traub, Wesley A. Jucks, Kenneth W. Johnson, David G. Chance, Kelly V. 1995 application/pdf http://nrs.harvard.edu/urn-3:HUL.InstRepos:41467438 https://doi.org/10.1029/95JD00619 en_US eng American Geophysical Union Journal of Geophysical Research Traub, Wesley A., Kenneth W. Jucks, David G. Johnson, and Kelly V. Chance. 1995. “Subsidence of the Arctic Stratosphere Determined from Thermal Emission of Hydrogen Fluoride.” Journal of Geophysical Research 100 (D6): 11261. https://doi.org/10.1029/95jd00619. 0022-1406 0148-0227 1934-2098 2156-2202 http://nrs.harvard.edu/urn-3:HUL.InstRepos:41467438 doi:10.1029/95JD00619 Journal Article 1995 ftharvardudash https://doi.org/10.1029/95JD00619 https://doi.org/10.1029/95jd00619 2022-04-04T11:36:05Z We determine subsidence in the Arctic stratospheric vortex from measurements of the column density of hydrogen fluoride, using a rotational line in thermal emission. The data were obtained with the far-infrared spectrometer on board the NASA DC-8 aircraft during the Arctic Airborne Stratospheric Expedition, from January through Mai ch 1992. A wide range of meteorological conditions was sampled, both inside and outside the polar vortex region. The measured values of subsidence are analyzed as a function of time of year and potential vorticity. From this analysis we draw the following conclusions: (1) Subsidence is strongly correlated with potential vorticity. However, there appear to be other factors, including meteorological conditions, which play a lesser role. (2) The gradient of subsidence with respect to potential vorticity is large and approximately constant across the Vortex wall and is small elsewhere. The gradient of subsidence with respect to horizontal distance is dramatically large across the vortex wall. (3) There appears to be substantial descent in the early winter vortex, from the evidence of the observed subsidence in January and the assumption of zero subsidence at the fall equinox. (4) Descent continues to occur in late winter, with measured vertical velocities similar to that inferred for early winter. The average early and late winter vertical velocity at a representative altitude of 18 km is 0.052(+/-0.013) cm s(-1). (5) At the measured rate of subsidence the time required to flush the stratosphere by one scale height is about 6 months. Accepted Manuscript Article in Journal/Newspaper Arctic Arctic Harvard University: DASH - Digital Access to Scholarship at Harvard Arctic Journal of Geophysical Research 100 D6 11261 |
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Open Polar |
collection |
Harvard University: DASH - Digital Access to Scholarship at Harvard |
op_collection_id |
ftharvardudash |
language |
English |
description |
We determine subsidence in the Arctic stratospheric vortex from measurements of the column density of hydrogen fluoride, using a rotational line in thermal emission. The data were obtained with the far-infrared spectrometer on board the NASA DC-8 aircraft during the Arctic Airborne Stratospheric Expedition, from January through Mai ch 1992. A wide range of meteorological conditions was sampled, both inside and outside the polar vortex region. The measured values of subsidence are analyzed as a function of time of year and potential vorticity. From this analysis we draw the following conclusions: (1) Subsidence is strongly correlated with potential vorticity. However, there appear to be other factors, including meteorological conditions, which play a lesser role. (2) The gradient of subsidence with respect to potential vorticity is large and approximately constant across the Vortex wall and is small elsewhere. The gradient of subsidence with respect to horizontal distance is dramatically large across the vortex wall. (3) There appears to be substantial descent in the early winter vortex, from the evidence of the observed subsidence in January and the assumption of zero subsidence at the fall equinox. (4) Descent continues to occur in late winter, with measured vertical velocities similar to that inferred for early winter. The average early and late winter vertical velocity at a representative altitude of 18 km is 0.052(+/-0.013) cm s(-1). (5) At the measured rate of subsidence the time required to flush the stratosphere by one scale height is about 6 months. Accepted Manuscript |
format |
Article in Journal/Newspaper |
author |
Traub, Wesley A. Jucks, Kenneth W. Johnson, David G. Chance, Kelly V. |
spellingShingle |
Traub, Wesley A. Jucks, Kenneth W. Johnson, David G. Chance, Kelly V. Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride |
author_facet |
Traub, Wesley A. Jucks, Kenneth W. Johnson, David G. Chance, Kelly V. |
author_sort |
Traub, Wesley A. |
title |
Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride |
title_short |
Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride |
title_full |
Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride |
title_fullStr |
Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride |
title_full_unstemmed |
Subsidence of the Arctic stratosphere determined from thermal emission of hydrogen fluoride |
title_sort |
subsidence of the arctic stratosphere determined from thermal emission of hydrogen fluoride |
publisher |
American Geophysical Union |
publishDate |
1995 |
url |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:41467438 https://doi.org/10.1029/95JD00619 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic |
genre_facet |
Arctic Arctic |
op_relation |
Journal of Geophysical Research Traub, Wesley A., Kenneth W. Jucks, David G. Johnson, and Kelly V. Chance. 1995. “Subsidence of the Arctic Stratosphere Determined from Thermal Emission of Hydrogen Fluoride.” Journal of Geophysical Research 100 (D6): 11261. https://doi.org/10.1029/95jd00619. 0022-1406 0148-0227 1934-2098 2156-2202 http://nrs.harvard.edu/urn-3:HUL.InstRepos:41467438 doi:10.1029/95JD00619 |
op_doi |
https://doi.org/10.1029/95JD00619 https://doi.org/10.1029/95jd00619 |
container_title |
Journal of Geophysical Research |
container_volume |
100 |
container_issue |
D6 |
container_start_page |
11261 |
_version_ |
1766299033824919552 |