Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992
We report observations of stratospheric chlorine monoxide over the altitude range approx. 16 to 50 km at Thule, Greenland from Feb. 8 to Mar. 24, 1992. A new, more sensitive ground-based mm-wave spectrometer was employed for these measurements, similar in principle to that used earlier for the disco...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19950004618 2023-05-15T14:04:38+02:00 Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992 Reeves, John M. Shindell, Drew T. Emmons, Louisa K. Dezafra, Robert L. Unclassified, Unlimited, Publicly available Apr 1, 1994 application/pdf http://hdl.handle.net/2060/19950004618 unknown Document ID: 19950004618 Accession ID: 95N11031 http://hdl.handle.net/2060/19950004618 No Copyright CASI GEOPHYSICS NASA. Goddard Space Flight Center, Ozone in the Troposphere and Stratosphere, Part 2; p 540-542 1994 ftnasantrs 2019-07-21T08:18:39Z We report observations of stratospheric chlorine monoxide over the altitude range approx. 16 to 50 km at Thule, Greenland from Feb. 8 to Mar. 24, 1992. A new, more sensitive ground-based mm-wave spectrometer was employed for these measurements, similar in principle to that used earlier for the discovery of low altitude ClO in the Antarctic springtime. In this report, we discuss different aspects of vertical distribution, secular trends, and diurnal variation of ClO in the Arctic stratosphere, based on a preliminary analysis of our Thule data. We see no evidence for large (approx. 1.2-1.5 ppb) amounts of ClO in the lower stratosphere at any time during February or March, in agreement with UARS-MLS findings for this period, and in marked contrast to findings reported for the Arctic in January. We have some evidence for small enhancements (approx. 0.2-0.5 ppb) in the 18-30 km range in late February-early March, which might be associated with volcanic aerosol, rather than PSC, processing. Other/Unknown Material Antarc* Antarctic Arctic Greenland Thule NASA Technical Reports Server (NTRS) Arctic Antarctic The Antarctic Greenland |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
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topic |
GEOPHYSICS |
spellingShingle |
GEOPHYSICS Reeves, John M. Shindell, Drew T. Emmons, Louisa K. Dezafra, Robert L. Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992 |
topic_facet |
GEOPHYSICS |
description |
We report observations of stratospheric chlorine monoxide over the altitude range approx. 16 to 50 km at Thule, Greenland from Feb. 8 to Mar. 24, 1992. A new, more sensitive ground-based mm-wave spectrometer was employed for these measurements, similar in principle to that used earlier for the discovery of low altitude ClO in the Antarctic springtime. In this report, we discuss different aspects of vertical distribution, secular trends, and diurnal variation of ClO in the Arctic stratosphere, based on a preliminary analysis of our Thule data. We see no evidence for large (approx. 1.2-1.5 ppb) amounts of ClO in the lower stratosphere at any time during February or March, in agreement with UARS-MLS findings for this period, and in marked contrast to findings reported for the Arctic in January. We have some evidence for small enhancements (approx. 0.2-0.5 ppb) in the 18-30 km range in late February-early March, which might be associated with volcanic aerosol, rather than PSC, processing. |
format |
Other/Unknown Material |
author |
Reeves, John M. Shindell, Drew T. Emmons, Louisa K. Dezafra, Robert L. |
author_facet |
Reeves, John M. Shindell, Drew T. Emmons, Louisa K. Dezafra, Robert L. |
author_sort |
Reeves, John M. |
title |
Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992 |
title_short |
Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992 |
title_full |
Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992 |
title_fullStr |
Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992 |
title_full_unstemmed |
Measurements of the vertical profile, diurnal variation, and secular change of ClO in the stratosphere over Thule, Greenland, February-March, 1992 |
title_sort |
measurements of the vertical profile, diurnal variation, and secular change of clo in the stratosphere over thule, greenland, february-march, 1992 |
publishDate |
1994 |
url |
http://hdl.handle.net/2060/19950004618 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic Antarctic The Antarctic Greenland |
geographic_facet |
Arctic Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Arctic Greenland Thule |
genre_facet |
Antarc* Antarctic Arctic Greenland Thule |
op_source |
CASI |
op_relation |
Document ID: 19950004618 Accession ID: 95N11031 http://hdl.handle.net/2060/19950004618 |
op_rights |
No Copyright |
_version_ |
1766275856610623488 |