© Author(s) 2008. This work is distributed under the Creative Commons Attribution 3.0 License. Atmospheric Chemistry and Physics Chemical ozone loss in the Arctic winter 1991–1992
Abstract. Chemical ozone loss in winter 1991–1992 is re-calculated based on observations of the HALOE satellite in-strument, Version 19, ER-2 aircraft measurements and bal-loon data. HALOE satellite observations are shown to be reliable in the lower stratosphere below 400 K, at altitudes where the m...
| Main Authors: | , , , , , , |
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| Format: | Text |
| Language: | English |
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2008
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.592.7253 http://hal.archives-ouvertes.fr/docs/00/32/85/76/PDF/acp-8-1897-2008.pdf |
| Summary: | Abstract. Chemical ozone loss in winter 1991–1992 is re-calculated based on observations of the HALOE satellite in-strument, Version 19, ER-2 aircraft measurements and bal-loon data. HALOE satellite observations are shown to be reliable in the lower stratosphere below 400 K, at altitudes where the measurements are most likely disturbed by the en-hanced sulfate aerosol loading, as a result of the Mt. Pinatubo eruption in June 1991. Significant chemical ozone loss (13– 17 DU) is observed below 380 K from Kiruna balloon obser-vations and HALOE satellite data between December 1991 and March 1992. For the two winters after the Mt. Pinatubo eruption, HALOE satellite observations show a stronger ex-tent of chemical ozone loss towards lower altitudes com-pared to other Arctic winters between 1991 and 2003. In spite of already occurring deactivation of chlorine in March 1992, MIPAS-B and LPMA balloon observations indicate that chlorine was still activated at lower altitudes, consistent with observed chemical ozone loss occurring between Febru-ary and March and April. Large chemical ozone loss of more than 70 DU in the Arctic winter 1991–1992 as calculated in earlier studies is corroborated here. Correspondence to: S. Tilmes |
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