The foehn effect during easterly flow over Svalbard
This article presents a comprehensive analysis of the foehn episode which occurred over Svalbard on 30–31 May 2017. This episode is well documented by multiplatform measurements carried out during the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) and Physical feedba...
Published in: | Atmospheric Chemistry and Physics |
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Copernicus Publications
2022
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Online Access: | https://epic.awi.de/id/eprint/55581/ https://epic.awi.de/id/eprint/55581/1/Shestakova_Foehn_2022.pdf https://hdl.handle.net/10013/epic.45419f63-c065-4504-a854-6c348f1c5d88 https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:55581 2023-05-15T13:05:44+02:00 The foehn effect during easterly flow over Svalbard Shestakova, Anna Chechin, Dmitry Lüpkes, Christof Hartmann, Jörg Maturilli, Marion 2022 application/pdf https://epic.awi.de/id/eprint/55581/ https://epic.awi.de/id/eprint/55581/1/Shestakova_Foehn_2022.pdf https://hdl.handle.net/10013/epic.45419f63-c065-4504-a854-6c348f1c5d88 https://hdl.handle.net/ unknown Copernicus Publications https://epic.awi.de/id/eprint/55581/1/Shestakova_Foehn_2022.pdf https://hdl.handle.net/ Shestakova, A. , Chechin, D. orcid:0000-0003-0021-9945 , Lüpkes, C. orcid:0000-0001-6518-0717 , Hartmann, J. and Maturilli, M. orcid:0000-0001-6818-7383 (2022) The foehn effect during easterly flow over Svalbard , Atmos. Chem. Phys., 22 , pp. 1529-1548 . doi:10.5194/acp-22-1529-2022 <https://doi.org/10.5194/acp-22-1529-2022> , hdl:10013/epic.45419f63-c065-4504-a854-6c348f1c5d88 EPIC3Atmos. Chem. Phys., Copernicus Publications, 22, pp. 1529-1548 Article isiRev 2022 ftawi https://doi.org/10.5194/acp-22-1529-2022 2022-02-14T00:10:16Z This article presents a comprehensive analysis of the foehn episode which occurred over Svalbard on 30–31 May 2017. This episode is well documented by multiplatform measurements carried out during the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) and Physical feedbacks of Arctic PBL, Sea ice, Cloud And AerosoL (PASCAL) campaigns. Both orographic wind modification and foehn warming are considered here. The latter is found to be primarily produced by the isentropic drawdown, which is evident from observations and mesoscale numerical modeling. The structure of the observed foehn warming was in many aspects very similar to that for foehns over the Antarctic Peninsula. In particular, it is found that the warming was proportional to the height of the mountain ridges and propagated far downstream. Also, a strong spatial heterogeneity of the foehn warming was observed with a clear cold footprint associated with gap flows along the mountain valleys and fjords. On the downstream side, a shallow stably stratified boundary layer below a well-mixed layer formed over the snow-covered land and cold open water. The foehn warming downwind of Svalbard strengthened the north–south horizontal temperature gradient across the ice edge near the northern tip of Svalbard. This suggests that the associated baroclinicity might have strengthened the observed northern tip jet. A positive daytime radiative budget on the surface, increased by the foehn clearance, along with the downward sensible heat flux provoked accelerated snowmelt in the mountain valleys in Ny-Ålesund and Adventdalen, which suggests a potentially large effect of the frequently observed Svalbard foehns on the snow cover and the glacier heat and mass balance. Article in Journal/Newspaper Adventdalen Antarc* Antarctic Antarctic Peninsula Arctic glacier Ny Ålesund Ny-Ålesund Sea ice Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Adventdalen ENVELOPE(16.264,16.264,78.181,78.181) Antarctic Antarctic Peninsula Arctic Ny-Ålesund Svalbard The Antarctic Atmospheric Chemistry and Physics 22 2 1529 1548 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
This article presents a comprehensive analysis of the foehn episode which occurred over Svalbard on 30–31 May 2017. This episode is well documented by multiplatform measurements carried out during the Arctic CLoud Observations Using airborne measurements during polar Day (ACLOUD) and Physical feedbacks of Arctic PBL, Sea ice, Cloud And AerosoL (PASCAL) campaigns. Both orographic wind modification and foehn warming are considered here. The latter is found to be primarily produced by the isentropic drawdown, which is evident from observations and mesoscale numerical modeling. The structure of the observed foehn warming was in many aspects very similar to that for foehns over the Antarctic Peninsula. In particular, it is found that the warming was proportional to the height of the mountain ridges and propagated far downstream. Also, a strong spatial heterogeneity of the foehn warming was observed with a clear cold footprint associated with gap flows along the mountain valleys and fjords. On the downstream side, a shallow stably stratified boundary layer below a well-mixed layer formed over the snow-covered land and cold open water. The foehn warming downwind of Svalbard strengthened the north–south horizontal temperature gradient across the ice edge near the northern tip of Svalbard. This suggests that the associated baroclinicity might have strengthened the observed northern tip jet. A positive daytime radiative budget on the surface, increased by the foehn clearance, along with the downward sensible heat flux provoked accelerated snowmelt in the mountain valleys in Ny-Ålesund and Adventdalen, which suggests a potentially large effect of the frequently observed Svalbard foehns on the snow cover and the glacier heat and mass balance. |
format |
Article in Journal/Newspaper |
author |
Shestakova, Anna Chechin, Dmitry Lüpkes, Christof Hartmann, Jörg Maturilli, Marion |
spellingShingle |
Shestakova, Anna Chechin, Dmitry Lüpkes, Christof Hartmann, Jörg Maturilli, Marion The foehn effect during easterly flow over Svalbard |
author_facet |
Shestakova, Anna Chechin, Dmitry Lüpkes, Christof Hartmann, Jörg Maturilli, Marion |
author_sort |
Shestakova, Anna |
title |
The foehn effect during easterly flow over Svalbard |
title_short |
The foehn effect during easterly flow over Svalbard |
title_full |
The foehn effect during easterly flow over Svalbard |
title_fullStr |
The foehn effect during easterly flow over Svalbard |
title_full_unstemmed |
The foehn effect during easterly flow over Svalbard |
title_sort |
foehn effect during easterly flow over svalbard |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/55581/ https://epic.awi.de/id/eprint/55581/1/Shestakova_Foehn_2022.pdf https://hdl.handle.net/10013/epic.45419f63-c065-4504-a854-6c348f1c5d88 https://hdl.handle.net/ |
long_lat |
ENVELOPE(16.264,16.264,78.181,78.181) |
geographic |
Adventdalen Antarctic Antarctic Peninsula Arctic Ny-Ålesund Svalbard The Antarctic |
geographic_facet |
Adventdalen Antarctic Antarctic Peninsula Arctic Ny-Ålesund Svalbard The Antarctic |
genre |
Adventdalen Antarc* Antarctic Antarctic Peninsula Arctic glacier Ny Ålesund Ny-Ålesund Sea ice Svalbard |
genre_facet |
Adventdalen Antarc* Antarctic Antarctic Peninsula Arctic glacier Ny Ålesund Ny-Ålesund Sea ice Svalbard |
op_source |
EPIC3Atmos. Chem. Phys., Copernicus Publications, 22, pp. 1529-1548 |
op_relation |
https://epic.awi.de/id/eprint/55581/1/Shestakova_Foehn_2022.pdf https://hdl.handle.net/ Shestakova, A. , Chechin, D. orcid:0000-0003-0021-9945 , Lüpkes, C. orcid:0000-0001-6518-0717 , Hartmann, J. and Maturilli, M. orcid:0000-0001-6818-7383 (2022) The foehn effect during easterly flow over Svalbard , Atmos. Chem. Phys., 22 , pp. 1529-1548 . doi:10.5194/acp-22-1529-2022 <https://doi.org/10.5194/acp-22-1529-2022> , hdl:10013/epic.45419f63-c065-4504-a854-6c348f1c5d88 |
op_doi |
https://doi.org/10.5194/acp-22-1529-2022 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
22 |
container_issue |
2 |
container_start_page |
1529 |
op_container_end_page |
1548 |
_version_ |
1766392535224156160 |