Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01
International audience During the Arctic winter of 2000/01, ground-based FTIR and millimetre-wave measurements revealed significant amounts of ClO over Kiruna after the final warming in February 2001. In fact, column amounts of ClO were still increased in March 2001 when temperatures were about 20K...
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ftinsu:oai:HAL:hal-00295867v1 2023-11-12T04:12:25+01:00 Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01 Blumenstock, T. Kopp, G. Hase, F. Hochschild, G. Mikuteit, S. Raffalski, U. Ruhnke, R. Institute for Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology (KIT) Swedish Institute of Space Physics Kiruna (IRF) 2006-03-20 https://hal.science/hal-00295867 https://hal.science/hal-00295867/document https://hal.science/hal-00295867/file/acp-6-897-2006.pdf en eng HAL CCSD European Geosciences Union hal-00295867 https://hal.science/hal-00295867 https://hal.science/hal-00295867/document https://hal.science/hal-00295867/file/acp-6-897-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295867 Atmospheric Chemistry and Physics, 2006, 6 (4), pp.897-905 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftinsu 2023-10-25T16:29:46Z International audience During the Arctic winter of 2000/01, ground-based FTIR and millimetre-wave measurements revealed significant amounts of ClO over Kiruna after the final warming in February 2001. In fact, column amounts of ClO were still increased in March 2001 when temperatures were about 20K above the PSC (Polar Stratospheric Clouds) threshold. At these temperatures, chlorine activation due to heterogeneous processes on PSCs is not possible even in the presence of strong lee wave effects. In order to discuss possible reasons of this feature, time series of other chemical species will be presented and discussed, too. Measurements of HF and COF 2 indicated that vortex air was still observed in mid-March 2001. Since the time series of HNO 3 column amounts do not give any evidence of a denitrification later than 11 February, chlorine activation persisting for several weeks after the presence of PSCs due to denitrification is rather unlikely. The photolysis of ClONO 2 -rich air which had been formed at the end of February and beginning of March 2001 as well as chlorine activation due to the presence of an unusual aerosol layer are discussed as possible causes of the increased ClO column amounts after the final warming. Article in Journal/Newspaper Arctic Kiruna Institut national des sciences de l'Univers: HAL-INSU Arctic Kiruna |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Blumenstock, T. Kopp, G. Hase, F. Hochschild, G. Mikuteit, S. Raffalski, U. Ruhnke, R. Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01 |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience During the Arctic winter of 2000/01, ground-based FTIR and millimetre-wave measurements revealed significant amounts of ClO over Kiruna after the final warming in February 2001. In fact, column amounts of ClO were still increased in March 2001 when temperatures were about 20K above the PSC (Polar Stratospheric Clouds) threshold. At these temperatures, chlorine activation due to heterogeneous processes on PSCs is not possible even in the presence of strong lee wave effects. In order to discuss possible reasons of this feature, time series of other chemical species will be presented and discussed, too. Measurements of HF and COF 2 indicated that vortex air was still observed in mid-March 2001. Since the time series of HNO 3 column amounts do not give any evidence of a denitrification later than 11 February, chlorine activation persisting for several weeks after the presence of PSCs due to denitrification is rather unlikely. The photolysis of ClONO 2 -rich air which had been formed at the end of February and beginning of March 2001 as well as chlorine activation due to the presence of an unusual aerosol layer are discussed as possible causes of the increased ClO column amounts after the final warming. |
author2 |
Institute for Meteorology and Climate Research (IMK) Karlsruhe Institute of Technology (KIT) Swedish Institute of Space Physics Kiruna (IRF) |
format |
Article in Journal/Newspaper |
author |
Blumenstock, T. Kopp, G. Hase, F. Hochschild, G. Mikuteit, S. Raffalski, U. Ruhnke, R. |
author_facet |
Blumenstock, T. Kopp, G. Hase, F. Hochschild, G. Mikuteit, S. Raffalski, U. Ruhnke, R. |
author_sort |
Blumenstock, T. |
title |
Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01 |
title_short |
Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01 |
title_full |
Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01 |
title_fullStr |
Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01 |
title_full_unstemmed |
Observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late Arctic winter 2000/01 |
title_sort |
observation of unusual chlorine activation by ground-based infrared and microwave spectroscopy in the late arctic winter 2000/01 |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00295867 https://hal.science/hal-00295867/document https://hal.science/hal-00295867/file/acp-6-897-2006.pdf |
geographic |
Arctic Kiruna |
geographic_facet |
Arctic Kiruna |
genre |
Arctic Kiruna |
genre_facet |
Arctic Kiruna |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295867 Atmospheric Chemistry and Physics, 2006, 6 (4), pp.897-905 |
op_relation |
hal-00295867 https://hal.science/hal-00295867 https://hal.science/hal-00295867/document https://hal.science/hal-00295867/file/acp-6-897-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782330963758415872 |