Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987
The Jet Propulsion Laboratory Mark IV interferometer recorded high-resolution, infrared solar spectra from the NASA DC-8 aircraft during flights over Antarctica in September 1987. The atmospheric absorption features in these spectra have been analyzed to determine the burdens of O3, NO, NO2, HNO3, C...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19900031882 2023-05-15T14:04:33+02:00 Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987 Toon, G. C. Farmer, C. B. Lowes, L. L. Schaper, P. W. Blavier, J.-F. Unclassified, Unlimited, Publicly available Nov 30, 1989 http://ntrs.nasa.gov/search.jsp?R=19900031882 unknown http://ntrs.nasa.gov/search.jsp?R=19900031882 Accession ID: 90A18937 Copyright Other Sources 46 Journal of Geophysical Research; 94; 16571-16 1989 ftnasantrs 2012-02-15T18:24:27Z The Jet Propulsion Laboratory Mark IV interferometer recorded high-resolution, infrared solar spectra from the NASA DC-8 aircraft during flights over Antarctica in September 1987. The atmospheric absorption features in these spectra have been analyzed to determine the burdens of O3, NO, NO2, HNO3, ClNO3, HCl, HF, CO2, CH4, N2O, HCN, CO, H2O, CFCl3, and CF2Cl2. The results show a 'collar' of high HNO3 and ClNO3 surrounding a 'core' in which the burdens of these and of HCl and NO2 are very low. Clear increases in the burdens of HF and HNO3 were observed during the course of September in the vortex core. HCl and NO2 exhibited smaller, less significant increases. The burdens of the tropospheric source gases, N2O, CH4, HCN, CFCl3, CF2Cl2, CO, and H2O, were observed to be much smaller over Antarctica than at midlatitudes. This, together with the fact that HF over Antarctica was more than double its midlatidue value, suggests that downwelling had occurred. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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46 Toon, G. C. Farmer, C. B. Lowes, L. L. Schaper, P. W. Blavier, J.-F. Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987 |
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description |
The Jet Propulsion Laboratory Mark IV interferometer recorded high-resolution, infrared solar spectra from the NASA DC-8 aircraft during flights over Antarctica in September 1987. The atmospheric absorption features in these spectra have been analyzed to determine the burdens of O3, NO, NO2, HNO3, ClNO3, HCl, HF, CO2, CH4, N2O, HCN, CO, H2O, CFCl3, and CF2Cl2. The results show a 'collar' of high HNO3 and ClNO3 surrounding a 'core' in which the burdens of these and of HCl and NO2 are very low. Clear increases in the burdens of HF and HNO3 were observed during the course of September in the vortex core. HCl and NO2 exhibited smaller, less significant increases. The burdens of the tropospheric source gases, N2O, CH4, HCN, CFCl3, CF2Cl2, CO, and H2O, were observed to be much smaller over Antarctica than at midlatitudes. This, together with the fact that HF over Antarctica was more than double its midlatidue value, suggests that downwelling had occurred. |
format |
Other/Unknown Material |
author |
Toon, G. C. Farmer, C. B. Lowes, L. L. Schaper, P. W. Blavier, J.-F. |
author_facet |
Toon, G. C. Farmer, C. B. Lowes, L. L. Schaper, P. W. Blavier, J.-F. |
author_sort |
Toon, G. C. |
title |
Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987 |
title_short |
Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987 |
title_full |
Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987 |
title_fullStr |
Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987 |
title_full_unstemmed |
Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987 |
title_sort |
infrared aircraft measurements of stratospheric composition over antarctica during september 1987 |
publishDate |
1989 |
url |
http://ntrs.nasa.gov/search.jsp?R=19900031882 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19900031882 Accession ID: 90A18937 |
op_rights |
Copyright |
_version_ |
1766275737552158720 |