Subsidence of the Arctic stratosphere as 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...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.531.2641 2023-05-15T14:54:15+02:00 Subsidence of the Arctic stratosphere as determined from thermal emission of hydrogen fluoride Wesley A. Traub Kenneth W. Jucks David G. Johnson Kelly V. Chance The Pennsylvania State University CiteSeerX Archives 1995 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.2641 http://www.cfa.harvard.edu/firs/papers/sub.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.2641 http://www.cfa.harvard.edu/firs/papers/sub.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cfa.harvard.edu/firs/papers/sub.pdf text 1995 ftciteseerx 2016-01-08T10:37:06Z 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 March 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. 1 Text Arctic Unknown Arctic |
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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 March 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. 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Wesley A. Traub Kenneth W. Jucks David G. Johnson Kelly V. Chance |
spellingShingle |
Wesley A. Traub Kenneth W. Jucks David G. Johnson Kelly V. Chance Subsidence of the Arctic stratosphere as determined from thermal emission of hydrogen fluoride |
author_facet |
Wesley A. Traub Kenneth W. Jucks David G. Johnson Kelly V. Chance |
author_sort |
Wesley A. Traub |
title |
Subsidence of the Arctic stratosphere as determined from thermal emission of hydrogen fluoride |
title_short |
Subsidence of the Arctic stratosphere as determined from thermal emission of hydrogen fluoride |
title_full |
Subsidence of the Arctic stratosphere as determined from thermal emission of hydrogen fluoride |
title_fullStr |
Subsidence of the Arctic stratosphere as determined from thermal emission of hydrogen fluoride |
title_full_unstemmed |
Subsidence of the Arctic stratosphere as determined from thermal emission of hydrogen fluoride |
title_sort |
subsidence of the arctic stratosphere as determined from thermal emission of hydrogen fluoride |
publishDate |
1995 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.2641 http://www.cfa.harvard.edu/firs/papers/sub.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
http://www.cfa.harvard.edu/firs/papers/sub.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.2641 http://www.cfa.harvard.edu/firs/papers/sub.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766325979202977792 |