Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion
Ground-based Fourier transform infrared (FTIR) measurements, performed in the Arctic polar night using the Moon as aninfrared light source, reveal already during the first half of December 1992 a considerable reduction in the amount ofstratospheric HCl and ClONO2. Balloon sondes yield that in the al...
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ftawi:oai:epic.awi.de:2254 2024-09-15T17:50:49+00:00 Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion Notholt, Justus von der Gathen, Peter Peil, S. 1995 https://epic.awi.de/id/eprint/2254/ https://hdl.handle.net/10013/epic.12842 unknown Notholt, J. , von der Gathen, P. orcid:0000-0001-7409-1556 and Peil, S. (1995) Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion , Journal of Geophysical ResearchD6, 100 , pp. 11269-11274 . hdl:10013/epic.12842 EPIC3Journal of Geophysical ResearchD6, 100, pp. 11269-11274 Article isiRev 1995 ftawi 2024-06-24T03:53:43Z Ground-based Fourier transform infrared (FTIR) measurements, performed in the Arctic polar night using the Moon as aninfrared light source, reveal already during the first half of December 1992 a considerable reduction in the amount ofstratospheric HCl and ClONO2. Balloon sondes yield that in the altitude range 16-22 km an ozone reduction occurred assoon as the circulating air masses were irradiated by sunlight. Within the same altitude range several polar stratosphericcloud (PSC) events are being reported throughout the winter. Assuming that the reduction of HCl and ClONO2 hadoccurred in the same altitude range, where the ozone depletion and PSCs were observed, our measurements imply thatalmost all HCl and ClONO2 in that altitude range had disappeared. This means that the stratosphere was primed forozone depletion very early in winter. The results confirm model studies that in the Arctic; already weak PSC events canlead to a strong conversion of chlorine reservoir compounds into active forms, initiating the ozone depletion, as soon assunlight is available. Article in Journal/Newspaper Arctic polar night Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Ground-based Fourier transform infrared (FTIR) measurements, performed in the Arctic polar night using the Moon as aninfrared light source, reveal already during the first half of December 1992 a considerable reduction in the amount ofstratospheric HCl and ClONO2. Balloon sondes yield that in the altitude range 16-22 km an ozone reduction occurred assoon as the circulating air masses were irradiated by sunlight. Within the same altitude range several polar stratosphericcloud (PSC) events are being reported throughout the winter. Assuming that the reduction of HCl and ClONO2 hadoccurred in the same altitude range, where the ozone depletion and PSCs were observed, our measurements imply thatalmost all HCl and ClONO2 in that altitude range had disappeared. This means that the stratosphere was primed forozone depletion very early in winter. The results confirm model studies that in the Arctic; already weak PSC events canlead to a strong conversion of chlorine reservoir compounds into active forms, initiating the ozone depletion, as soon assunlight is available. |
format |
Article in Journal/Newspaper |
author |
Notholt, Justus von der Gathen, Peter Peil, S. |
spellingShingle |
Notholt, Justus von der Gathen, Peter Peil, S. Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion |
author_facet |
Notholt, Justus von der Gathen, Peter Peil, S. |
author_sort |
Notholt, Justus |
title |
Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion |
title_short |
Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion |
title_full |
Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion |
title_fullStr |
Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion |
title_full_unstemmed |
Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion |
title_sort |
heterogeneous conversion of hcl and clono2 during the arctic winter 1992/93 initiating ozone depletion |
publishDate |
1995 |
url |
https://epic.awi.de/id/eprint/2254/ https://hdl.handle.net/10013/epic.12842 |
genre |
Arctic polar night |
genre_facet |
Arctic polar night |
op_source |
EPIC3Journal of Geophysical ResearchD6, 100, pp. 11269-11274 |
op_relation |
Notholt, J. , von der Gathen, P. orcid:0000-0001-7409-1556 and Peil, S. (1995) Heterogeneous conversion of HCl and ClONO2 during the Arctic winter 1992/93 initiating ozone depletion , Journal of Geophysical ResearchD6, 100 , pp. 11269-11274 . hdl:10013/epic.12842 |
_version_ |
1810292624689463296 |