The Cl-36 in the stratosphere
Initial measurements of the cosmogenic radionuclide, Cl-36, in the lower stratosphere were made by accelerator mass spectrometry. Samples were obtained using the large volume LASL air sampling pods on a NASA WB-57F aircraft. Untreated (for collection of particulates only) and tetrabutyl ammonium hyd...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910016145 2023-05-15T13:42:52+02:00 The Cl-36 in the stratosphere Wahlen, Martin Weyer, Harley Kubik, Peter Deck, Bruce Gove, Harry Sharma, Pankaj Unclassified, Unlimited, Publicly available JAN 1, 1991 application/pdf http://hdl.handle.net/2060/19910016145 unknown Document ID: 19910016145 Accession ID: 91N25459 http://hdl.handle.net/2060/19910016145 No Copyright CASI ENVIRONMENT POLLUTION NASA, Washington, 4th Airborne Geoscience Workshop; p 131-132 1991 ftnasantrs 2015-03-15T05:17:19Z Initial measurements of the cosmogenic radionuclide, Cl-36, in the lower stratosphere were made by accelerator mass spectrometry. Samples were obtained using the large volume LASL air sampling pods on a NASA WB-57F aircraft. Untreated (for collection of particulates only) and tetrabutyl ammonium hydroxide treated (for collection of particulates and HCl) IPC-1478 filters were flown on three flights in the lower stratosphere. Chlorine (Cl) and Cl compounds are important trace constituents for stratospheric chemistry, in particular with respect to O3 destruction. Stratospheric Cl chemistry has recently received increased attention with the observation of strong O3 depletion in the Antarctic winter vortex and in the weaker and more complex Arctic winter vortices. Cosmogenic (Cl-36) is produced by spallation reactions from Ar mainly in the stratosphere, and has had several applications as a geochemical tracer. The large amounts of Cl-36 introduced by nuclear weapon testing have been removed from the stratosphere by now, and measurements in the stratosphere to obtain cosmogenic production rates and concentration distributions is now possible. The use of cosmogenic Cl-36 as a tracer for stratospheric Cl chemistry and for stratospheric/tropospheric exchange processes is investigated. A first attempt to determine stratospheric and tropospheric production rates, the partitioning of Cl-36 among particulate and gaseous Cl compounds, and the respective inventories and removal rates is being made. Results from a flight at 13.7 km, 30-33 degrees N, 97-107 degrees W, and from a second flight at 17.7 km, 43-45-36 degrees N, 92-94 degrees W, for the untreated and treated filters respectively are presented. Other/Unknown Material Antarc* Antarctic Arctic NASA Technical Reports Server (NTRS) Arctic Antarctic The Antarctic |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
unknown |
topic |
ENVIRONMENT POLLUTION |
spellingShingle |
ENVIRONMENT POLLUTION Wahlen, Martin Weyer, Harley Kubik, Peter Deck, Bruce Gove, Harry Sharma, Pankaj The Cl-36 in the stratosphere |
topic_facet |
ENVIRONMENT POLLUTION |
description |
Initial measurements of the cosmogenic radionuclide, Cl-36, in the lower stratosphere were made by accelerator mass spectrometry. Samples were obtained using the large volume LASL air sampling pods on a NASA WB-57F aircraft. Untreated (for collection of particulates only) and tetrabutyl ammonium hydroxide treated (for collection of particulates and HCl) IPC-1478 filters were flown on three flights in the lower stratosphere. Chlorine (Cl) and Cl compounds are important trace constituents for stratospheric chemistry, in particular with respect to O3 destruction. Stratospheric Cl chemistry has recently received increased attention with the observation of strong O3 depletion in the Antarctic winter vortex and in the weaker and more complex Arctic winter vortices. Cosmogenic (Cl-36) is produced by spallation reactions from Ar mainly in the stratosphere, and has had several applications as a geochemical tracer. The large amounts of Cl-36 introduced by nuclear weapon testing have been removed from the stratosphere by now, and measurements in the stratosphere to obtain cosmogenic production rates and concentration distributions is now possible. The use of cosmogenic Cl-36 as a tracer for stratospheric Cl chemistry and for stratospheric/tropospheric exchange processes is investigated. A first attempt to determine stratospheric and tropospheric production rates, the partitioning of Cl-36 among particulate and gaseous Cl compounds, and the respective inventories and removal rates is being made. Results from a flight at 13.7 km, 30-33 degrees N, 97-107 degrees W, and from a second flight at 17.7 km, 43-45-36 degrees N, 92-94 degrees W, for the untreated and treated filters respectively are presented. |
format |
Other/Unknown Material |
author |
Wahlen, Martin Weyer, Harley Kubik, Peter Deck, Bruce Gove, Harry Sharma, Pankaj |
author_facet |
Wahlen, Martin Weyer, Harley Kubik, Peter Deck, Bruce Gove, Harry Sharma, Pankaj |
author_sort |
Wahlen, Martin |
title |
The Cl-36 in the stratosphere |
title_short |
The Cl-36 in the stratosphere |
title_full |
The Cl-36 in the stratosphere |
title_fullStr |
The Cl-36 in the stratosphere |
title_full_unstemmed |
The Cl-36 in the stratosphere |
title_sort |
cl-36 in the stratosphere |
publishDate |
1991 |
url |
http://hdl.handle.net/2060/19910016145 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
CASI |
op_relation |
Document ID: 19910016145 Accession ID: 91N25459 http://hdl.handle.net/2060/19910016145 |
op_rights |
No Copyright |
_version_ |
1766173741515014144 |