Polar stratospheric optical depth observed between 1978 and 1985
Observations of the stratospheric optical depth at 1.0 micron obtained for high latitudes are presented for a 7-year period. Weekly averaged data determined from measurements made by the Stratospheric Aerosol Measurement experiment from October 1978-1985 show that the overall yearly values in both p...
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1987
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ftnasantrs:oai:casi.ntrs.nasa.gov:19870053495 2023-05-15T14:01:08+02:00 Polar stratospheric optical depth observed between 1978 and 1985 Mccormick, M. P. Trepte, C. R. Unclassified, Unlimited, Publicly available Apr 20, 1987 http://ntrs.nasa.gov/search.jsp?R=19870053495 unknown http://ntrs.nasa.gov/search.jsp?R=19870053495 Accession ID: 87A40769 Copyright Other Sources 46 Journal of Geophysical Research; 92; 4297-430 1987 ftnasantrs 2012-02-15T17:14:45Z Observations of the stratospheric optical depth at 1.0 micron obtained for high latitudes are presented for a 7-year period. Weekly averaged data determined from measurements made by the Stratospheric Aerosol Measurement experiment from October 1978-1985 show that the overall yearly values in both polar regions are controlled by volcanic perturbations, with most volcanic effects being experienced in Arctic latitudes. Conservatively, peak values found in the Antarctic region were approximately 0.02 and in the Arctic region about 0.55. Probable values for these regions are estimated to be 0.26 and 0.11, respectively. The weekly averaged data also show the seasonal fluctuations due to microphysical and dynamical processes. Comparison of the optical depth record with a weekly averaged 50-mbar temperature record indicates that polar stratospheric clouds are present in the southern high latitudes each year near this level from early June to early September. A depression observed in the optical depth record each austral spring season is believed to be the result of the downward displacement of particles caused by subsidence and sedimentation during the course of winter. Following the breakup of the vortex, optical depth values increase as aerosol is transported poleward. These features are noted to be present in the Arctic region as well, but on a smaller scale because of the satellite sampling methodology and the averaging scheme employed. Other/Unknown Material Antarc* Antarctic Arctic NASA Technical Reports Server (NTRS) Arctic Antarctic The Antarctic Austral |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
unknown |
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46 |
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46 Mccormick, M. P. Trepte, C. R. Polar stratospheric optical depth observed between 1978 and 1985 |
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46 |
description |
Observations of the stratospheric optical depth at 1.0 micron obtained for high latitudes are presented for a 7-year period. Weekly averaged data determined from measurements made by the Stratospheric Aerosol Measurement experiment from October 1978-1985 show that the overall yearly values in both polar regions are controlled by volcanic perturbations, with most volcanic effects being experienced in Arctic latitudes. Conservatively, peak values found in the Antarctic region were approximately 0.02 and in the Arctic region about 0.55. Probable values for these regions are estimated to be 0.26 and 0.11, respectively. The weekly averaged data also show the seasonal fluctuations due to microphysical and dynamical processes. Comparison of the optical depth record with a weekly averaged 50-mbar temperature record indicates that polar stratospheric clouds are present in the southern high latitudes each year near this level from early June to early September. A depression observed in the optical depth record each austral spring season is believed to be the result of the downward displacement of particles caused by subsidence and sedimentation during the course of winter. Following the breakup of the vortex, optical depth values increase as aerosol is transported poleward. These features are noted to be present in the Arctic region as well, but on a smaller scale because of the satellite sampling methodology and the averaging scheme employed. |
format |
Other/Unknown Material |
author |
Mccormick, M. P. Trepte, C. R. |
author_facet |
Mccormick, M. P. Trepte, C. R. |
author_sort |
Mccormick, M. P. |
title |
Polar stratospheric optical depth observed between 1978 and 1985 |
title_short |
Polar stratospheric optical depth observed between 1978 and 1985 |
title_full |
Polar stratospheric optical depth observed between 1978 and 1985 |
title_fullStr |
Polar stratospheric optical depth observed between 1978 and 1985 |
title_full_unstemmed |
Polar stratospheric optical depth observed between 1978 and 1985 |
title_sort |
polar stratospheric optical depth observed between 1978 and 1985 |
publishDate |
1987 |
url |
http://ntrs.nasa.gov/search.jsp?R=19870053495 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic Antarctic The Antarctic Austral |
geographic_facet |
Arctic Antarctic The Antarctic Austral |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19870053495 Accession ID: 87A40769 |
op_rights |
Copyright |
_version_ |
1766270736667770880 |