Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex
The stratospheric water vapour mixing ratio inside, outside, and at the edge of the polar vortex has been accurately measured by the FLASH-B Lyman-Alpha hygrometer during the LAUTLOS campaign in Sodankylä, Finland, in January and February 2004. The retrieved H2O profiles reveal a detailed view on th...
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ftawi:oai:epic.awi.de:13873 2023-09-05T13:15:46+02:00 Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex Maturilli, Marion Fierli, F. Yushkov, V. Lukyanov, A. Khaykin, S. Hauchecorne, A. 2006 https://epic.awi.de/id/eprint/13873/ https://hdl.handle.net/10013/epic.24233 unknown Maturilli, M. orcid:0000-0001-6818-7383 , Fierli, F. , Yushkov, V. , Lukyanov, A. , Khaykin, S. and Hauchecorne, A. (2006) Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex , Annales geophysicae, 24 , pp. 1511-1521 . hdl:10013/epic.24233 EPIC3Annales geophysicae, 24, pp. 1511-1521 Article isiRev 2006 ftawi 2023-08-22T19:50:49Z The stratospheric water vapour mixing ratio inside, outside, and at the edge of the polar vortex has been accurately measured by the FLASH-B Lyman-Alpha hygrometer during the LAUTLOS campaign in Sodankylä, Finland, in January and February 2004. The retrieved H2O profiles reveal a detailed view on the Arctic lower stratospheric water vapour distribution, and provide a valuable dataset for the validation of model and satellite data. Analysing the measurements with the semi-lagrangian advection model MIMOSA, water vapour profiles typical for the polar vortex interior and exterior have been identified, and laminae in the observed profiles have been correlated to filamentary structures in the potential vorticity field. Applying the validated MIMOSA transport scheme to specific humidity fields from operational ECMWF analyses, large discrepancies from the observed profiles arise. Although MIMOSA is able to reproduce weak water vapour filaments and improves the shape of the profiles compared to operational ECMWF analyses, both models reveal a dry bias of about 1 ppmv in the lower stratosphere above 400 K, accounting for a relative difference from the measurements in the order of 20 %. The large dry bias in the analysis representation of stratospheric water vapour in the Arctic implies the need for future regular measurements of water vapour in the polar stratosphere to allow the validation and improvement of climate models. Article in Journal/Newspaper Arctic Arctic Sodankylä Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
The stratospheric water vapour mixing ratio inside, outside, and at the edge of the polar vortex has been accurately measured by the FLASH-B Lyman-Alpha hygrometer during the LAUTLOS campaign in Sodankylä, Finland, in January and February 2004. The retrieved H2O profiles reveal a detailed view on the Arctic lower stratospheric water vapour distribution, and provide a valuable dataset for the validation of model and satellite data. Analysing the measurements with the semi-lagrangian advection model MIMOSA, water vapour profiles typical for the polar vortex interior and exterior have been identified, and laminae in the observed profiles have been correlated to filamentary structures in the potential vorticity field. Applying the validated MIMOSA transport scheme to specific humidity fields from operational ECMWF analyses, large discrepancies from the observed profiles arise. Although MIMOSA is able to reproduce weak water vapour filaments and improves the shape of the profiles compared to operational ECMWF analyses, both models reveal a dry bias of about 1 ppmv in the lower stratosphere above 400 K, accounting for a relative difference from the measurements in the order of 20 %. The large dry bias in the analysis representation of stratospheric water vapour in the Arctic implies the need for future regular measurements of water vapour in the polar stratosphere to allow the validation and improvement of climate models. |
format |
Article in Journal/Newspaper |
author |
Maturilli, Marion Fierli, F. Yushkov, V. Lukyanov, A. Khaykin, S. Hauchecorne, A. |
spellingShingle |
Maturilli, Marion Fierli, F. Yushkov, V. Lukyanov, A. Khaykin, S. Hauchecorne, A. Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex |
author_facet |
Maturilli, Marion Fierli, F. Yushkov, V. Lukyanov, A. Khaykin, S. Hauchecorne, A. |
author_sort |
Maturilli, Marion |
title |
Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex |
title_short |
Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex |
title_full |
Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex |
title_fullStr |
Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex |
title_full_unstemmed |
Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex |
title_sort |
stratospheric water vapour in the vicinity of the arctic polar vortex |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/13873/ https://hdl.handle.net/10013/epic.24233 |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Arctic Sodankylä |
geographic_facet |
Arctic Sodankylä |
genre |
Arctic Arctic Sodankylä |
genre_facet |
Arctic Arctic Sodankylä |
op_source |
EPIC3Annales geophysicae, 24, pp. 1511-1521 |
op_relation |
Maturilli, M. orcid:0000-0001-6818-7383 , Fierli, F. , Yushkov, V. , Lukyanov, A. , Khaykin, S. and Hauchecorne, A. (2006) Stratospheric Water Vapour in the Vicinity of the Arctic Polar Vortex , Annales geophysicae, 24 , pp. 1511-1521 . hdl:10013/epic.24233 |
_version_ |
1776197601343832064 |