The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange
International audience Balloon-borne water vapour measurements during January and February 2004, which were obtained as part of the LAUTLOS campaign at Sodankylä, Finland, 67° N, were used to analyse the water vapour distribution in the wintertime Arctic lowermost stratosphere. A 2.5 km thick layer...
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ftinsu:oai:HAL:hal-00296103v1 2023-11-12T04:12:39+01:00 The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange Karpechko, A. Lukyanov, A. Kyrö, E. Khaikin, S. Korshunov, L. Kivi, R. Vömel, H. Finnish Meteorological Institute (FMI) Central Aerological Observatory (CAO) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) Cooperative Institute for Research in Environmental Sciences (CIRES) University of Colorado Boulder -National Oceanic and Atmospheric Administration (NOAA) 2007-01-10 https://hal.science/hal-00296103 https://hal.science/hal-00296103/document https://hal.science/hal-00296103/file/acp-7-107-2007.pdf en eng HAL CCSD European Geosciences Union hal-00296103 https://hal.science/hal-00296103 https://hal.science/hal-00296103/document https://hal.science/hal-00296103/file/acp-7-107-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296103 Atmospheric Chemistry and Physics, 2007, 7 (1), pp.107-119 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftinsu 2023-10-25T16:29:35Z International audience Balloon-borne water vapour measurements during January and February 2004, which were obtained as part of the LAUTLOS campaign at Sodankylä, Finland, 67° N, were used to analyse the water vapour distribution in the wintertime Arctic lowermost stratosphere. A 2.5 km thick layer (or 30 K in the potential temperature scale) above the tropopause is characterized by a significant water vapour variability on a synoptic timescale with values between stratospheric and tropospheric, which is in good agreement with previously reported measurements. A cross-correlation analysis of ozone and water vapour confirms that this layer contains a mixture of stratospheric and tropospheric air masses. Some of the flights sampled laminae of enhanced water vapour above the tropopause. Meteorological analyses and backward trajectory calculations show that these features were related to filaments that had developed along the flanks of cut-off anticyclones, which had been active at this time over the Northern Atlantic. The role of the filaments was however not to transport water vapour from the troposphere to the stratosphere but rather to transport it within the stratosphere away from regions where intensive two-way stratosphere-troposphere exchange (STE) was identified. Intensive STE occurred around cut-off anticyclones in regions of strong winds, where calculations suggest the presence of clear-air turbulence (CAT). Evidences that CAT contributes to the troposphere-to-stratosphere transport (TST) are presented. However, statistically, relation between TST and CAT during the studied period is weak. Article in Journal/Newspaper Arctic Sodankylä Institut national des sciences de l'Univers: HAL-INSU Arctic Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Karpechko, A. Lukyanov, A. Kyrö, E. Khaikin, S. Korshunov, L. Kivi, R. Vömel, H. The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Balloon-borne water vapour measurements during January and February 2004, which were obtained as part of the LAUTLOS campaign at Sodankylä, Finland, 67° N, were used to analyse the water vapour distribution in the wintertime Arctic lowermost stratosphere. A 2.5 km thick layer (or 30 K in the potential temperature scale) above the tropopause is characterized by a significant water vapour variability on a synoptic timescale with values between stratospheric and tropospheric, which is in good agreement with previously reported measurements. A cross-correlation analysis of ozone and water vapour confirms that this layer contains a mixture of stratospheric and tropospheric air masses. Some of the flights sampled laminae of enhanced water vapour above the tropopause. Meteorological analyses and backward trajectory calculations show that these features were related to filaments that had developed along the flanks of cut-off anticyclones, which had been active at this time over the Northern Atlantic. The role of the filaments was however not to transport water vapour from the troposphere to the stratosphere but rather to transport it within the stratosphere away from regions where intensive two-way stratosphere-troposphere exchange (STE) was identified. Intensive STE occurred around cut-off anticyclones in regions of strong winds, where calculations suggest the presence of clear-air turbulence (CAT). Evidences that CAT contributes to the troposphere-to-stratosphere transport (TST) are presented. However, statistically, relation between TST and CAT during the studied period is weak. |
author2 |
Finnish Meteorological Institute (FMI) Central Aerological Observatory (CAO) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) Cooperative Institute for Research in Environmental Sciences (CIRES) University of Colorado Boulder -National Oceanic and Atmospheric Administration (NOAA) |
format |
Article in Journal/Newspaper |
author |
Karpechko, A. Lukyanov, A. Kyrö, E. Khaikin, S. Korshunov, L. Kivi, R. Vömel, H. |
author_facet |
Karpechko, A. Lukyanov, A. Kyrö, E. Khaikin, S. Korshunov, L. Kivi, R. Vömel, H. |
author_sort |
Karpechko, A. |
title |
The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange |
title_short |
The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange |
title_full |
The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange |
title_fullStr |
The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange |
title_full_unstemmed |
The water vapour distribution in the Arctic lowermost stratosphere during the LAUTLOS campaign and related transport processes including stratosphere-troposphere exchange |
title_sort |
water vapour distribution in the arctic lowermost stratosphere during the lautlos campaign and related transport processes including stratosphere-troposphere exchange |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00296103 https://hal.science/hal-00296103/document https://hal.science/hal-00296103/file/acp-7-107-2007.pdf |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Arctic Sodankylä |
geographic_facet |
Arctic Sodankylä |
genre |
Arctic Sodankylä |
genre_facet |
Arctic Sodankylä |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296103 Atmospheric Chemistry and Physics, 2007, 7 (1), pp.107-119 |
op_relation |
hal-00296103 https://hal.science/hal-00296103 https://hal.science/hal-00296103/document https://hal.science/hal-00296103/file/acp-7-107-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331064483577856 |