Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica
Stratospheric ozone is produced photochemically and destroyed by reactions with such minor constituents as O, NOx, HOx, and ClOx. Chlorofluoromethanes (CF2Cl2 and CFCl3) and dinitrogen oxide (NwO) are considered as major sources of the stratospheric ClOx and NOx, respectively. It is well known that...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19860018353 2023-05-15T13:49:36+02:00 Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica Hirota, H. Makino, Y. Chubachi, S. Muramatsu, H. Shiobara, M. Unclassified, Unlimited, Publicly available Dec 1, 1985 http://ntrs.nasa.gov/search.jsp?R=19860018353 unknown http://ntrs.nasa.gov/search.jsp?R=19860018353 Accession ID: 86N27825 No Copyright CASI 46 International Council of Scientific Unions Handbook for MAP, Vol. 18; 4 p 1985 ftnasantrs 2012-02-15T16:37:44Z Stratospheric ozone is produced photochemically and destroyed by reactions with such minor constituents as O, NOx, HOx, and ClOx. Chlorofluoromethanes (CF2Cl2 and CFCl3) and dinitrogen oxide (NwO) are considered as major sources of the stratospheric ClOx and NOx, respectively. It is well known that CF2Cl2 and CFCl3 are released only by man's activities, and are being accumulated in the troposphere. In order to assess the influence of these compounds on the natural ozone balance these gases have been measured over Japan since 1978. Measurements of Antarctic air samples are also indispensable to understanding the global distributions of these gases, because most CF2Cl2 and CFCl3 have been released in the Northern Hemisphere. Antarctic air samples were obtained by the 23rd, 24th and 25th Japanese Antarctic Research Expeditions, and analyzed by a gas-chromatographic method using an electron capture detector. Three experimental results were obtained: (1) latitudinal distribution of these gases from Tokyo to Syowa Station (69.0 deg S, 39.6 deg E), (2) time trends at Syowa Station, and (3) vertical distributions over Syowa Station. Results are reported. Other/Unknown Material Antarc* Antarctic Antarctica NASA Technical Reports Server (NTRS) Antarctic Syowa Station |
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NASA Technical Reports Server (NTRS) |
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46 |
spellingShingle |
46 Hirota, H. Makino, Y. Chubachi, S. Muramatsu, H. Shiobara, M. Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica |
topic_facet |
46 |
description |
Stratospheric ozone is produced photochemically and destroyed by reactions with such minor constituents as O, NOx, HOx, and ClOx. Chlorofluoromethanes (CF2Cl2 and CFCl3) and dinitrogen oxide (NwO) are considered as major sources of the stratospheric ClOx and NOx, respectively. It is well known that CF2Cl2 and CFCl3 are released only by man's activities, and are being accumulated in the troposphere. In order to assess the influence of these compounds on the natural ozone balance these gases have been measured over Japan since 1978. Measurements of Antarctic air samples are also indispensable to understanding the global distributions of these gases, because most CF2Cl2 and CFCl3 have been released in the Northern Hemisphere. Antarctic air samples were obtained by the 23rd, 24th and 25th Japanese Antarctic Research Expeditions, and analyzed by a gas-chromatographic method using an electron capture detector. Three experimental results were obtained: (1) latitudinal distribution of these gases from Tokyo to Syowa Station (69.0 deg S, 39.6 deg E), (2) time trends at Syowa Station, and (3) vertical distributions over Syowa Station. Results are reported. |
format |
Other/Unknown Material |
author |
Hirota, H. Makino, Y. Chubachi, S. Muramatsu, H. Shiobara, M. |
author_facet |
Hirota, H. Makino, Y. Chubachi, S. Muramatsu, H. Shiobara, M. |
author_sort |
Hirota, H. |
title |
Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica |
title_short |
Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica |
title_full |
Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica |
title_fullStr |
Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica |
title_full_unstemmed |
Gas-chromatographic measurements of atmospheric CF2Cl2, CFCl3 and N2O in Antarctica |
title_sort |
gas-chromatographic measurements of atmospheric cf2cl2, cfcl3 and n2o in antarctica |
publishDate |
1985 |
url |
http://ntrs.nasa.gov/search.jsp?R=19860018353 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
CASI |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19860018353 Accession ID: 86N27825 |
op_rights |
No Copyright |
_version_ |
1766251844402675712 |