Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration
In situ observations of reduced stratospheric water vapor combined with those of ice particle formation are rarely conducted. On the one hand, they are essential to broaden our knowledge about the formation of polar stratospheric clouds (PSCs). On the other hand, the observed profiles allow the comp...
Published in: | Journal of Geophysical Research: Atmospheres |
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Language: | English |
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Online Access: | https://doi.org/10.1029/2020JD033055 |
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ftncar:oai:drupal-site.org:articles_23707 2024-04-28T08:21:06+00:00 Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration Kivi, Rigel (author) Dörnbrack, Andreas (author) Sprenger, Michael (author) Vömel, Holger (author) 2020-09-27 https://doi.org/10.1029/2020JD033055 en eng Journal of Geophysical Research: Atmospheres--J. Geophys. Res. Atmos.--2169-897X--2169-8996 articles:23707 ark:/85065/d7b85cf8 doi:10.1029/2020JD033055 Copyright 2020 American Geophysical Union. article Text 2020 ftncar https://doi.org/10.1029/2020JD033055 2024-04-04T17:34:52Z In situ observations of reduced stratospheric water vapor combined with those of ice particle formation are rarely conducted. On the one hand, they are essential to broaden our knowledge about the formation of polar stratospheric clouds (PSCs). On the other hand, the observed profiles allow the comparison with global circulation models. Here we report about a balloon-borne observation above Sodankyla, Finland on 26 January 2005. The frostpoint hygrometer detected layers of reduced water vapor by up to 2 ppmv from 18.5 to 23 km. Beneath, a 1-km-deep layer of increased water vapor was identified. An aerosol backscatter sonde measured the presence of stratospheric ice clouds. According to meteorological analysis the PSCs were formed upstream above the east coast of Greenland due to mountain wave-induced cooling. The inertia-gravity waves generated a large and persistent stratospheric wake far downstream of Greenland and led to the observed dehydration. Comparing the most recent ERA5 data with operational analyses from 2005, we find an improved representation of mesoscale internal gravity waves, dehydration and PSC formation for this particular event. Article in Journal/Newspaper Greenland OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Geophysical Research: Atmospheres 125 18 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
In situ observations of reduced stratospheric water vapor combined with those of ice particle formation are rarely conducted. On the one hand, they are essential to broaden our knowledge about the formation of polar stratospheric clouds (PSCs). On the other hand, the observed profiles allow the comparison with global circulation models. Here we report about a balloon-borne observation above Sodankyla, Finland on 26 January 2005. The frostpoint hygrometer detected layers of reduced water vapor by up to 2 ppmv from 18.5 to 23 km. Beneath, a 1-km-deep layer of increased water vapor was identified. An aerosol backscatter sonde measured the presence of stratospheric ice clouds. According to meteorological analysis the PSCs were formed upstream above the east coast of Greenland due to mountain wave-induced cooling. The inertia-gravity waves generated a large and persistent stratospheric wake far downstream of Greenland and led to the observed dehydration. Comparing the most recent ERA5 data with operational analyses from 2005, we find an improved representation of mesoscale internal gravity waves, dehydration and PSC formation for this particular event. |
author2 |
Kivi, Rigel (author) Dörnbrack, Andreas (author) Sprenger, Michael (author) Vömel, Holger (author) |
format |
Article in Journal/Newspaper |
title |
Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration |
spellingShingle |
Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration |
title_short |
Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration |
title_full |
Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration |
title_fullStr |
Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration |
title_full_unstemmed |
Far‐ranging impact of mountain waves excited over Greenland on stratospheric dehydration and rehydration |
title_sort |
far‐ranging impact of mountain waves excited over greenland on stratospheric dehydration and rehydration |
publishDate |
2020 |
url |
https://doi.org/10.1029/2020JD033055 |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
Journal of Geophysical Research: Atmospheres--J. Geophys. Res. Atmos.--2169-897X--2169-8996 articles:23707 ark:/85065/d7b85cf8 doi:10.1029/2020JD033055 |
op_rights |
Copyright 2020 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2020JD033055 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
125 |
container_issue |
18 |
_version_ |
1797583627062607872 |