Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions
Arctic sea ice has declined in all seasons accompanied by rapid atmospheric warming. Here, the focus lies on the wider Fram Strait region where the connection between trends in observed near-surface variables (temperature, humidity, wind speed) and local sea ice conditions are analyzed. Reanalysis d...
Published in: | The Cryosphere |
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Copernicus Publications
2023
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Online Access: | https://epic.awi.de/id/eprint/57926/ https://epic.awi.de/id/eprint/57926/1/Schmitt_Lupkes_2023.pdf https://hdl.handle.net/10013/epic.cb32b1c2-cb1e-4e92-8804-4c8f20bc1228 |
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ftawi:oai:epic.awi.de:57926 2023-09-26T15:15:24+02:00 Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions Schmitt, Amelie U Lüpkes, Christof 2023-08-03 application/pdf https://epic.awi.de/id/eprint/57926/ https://epic.awi.de/id/eprint/57926/1/Schmitt_Lupkes_2023.pdf https://hdl.handle.net/10013/epic.cb32b1c2-cb1e-4e92-8804-4c8f20bc1228 unknown Copernicus Publications https://epic.awi.de/id/eprint/57926/1/Schmitt_Lupkes_2023.pdf Schmitt, A. U. and Lüpkes, C. orcid:0000-0001-6518-0717 (2023) Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions , The Cryosphere, 17 , pp. 3115-3136 . doi:10.5194/tc-17-3115-2023 <https://doi.org/10.5194/tc-17-3115-2023> , hdl:10013/epic.cb32b1c2-cb1e-4e92-8804-4c8f20bc1228 EPIC3The Cryosphere, Copernicus Publications, 17, pp. 3115-3136 Article isiRev 2023 ftawi https://doi.org/10.5194/tc-17-3115-2023 2023-08-27T23:21:02Z Arctic sea ice has declined in all seasons accompanied by rapid atmospheric warming. Here, the focus lies on the wider Fram Strait region where the connection between trends in observed near-surface variables (temperature, humidity, wind speed) and local sea ice conditions are analyzed. Reanalysis data from ERA5 and MERRA-2 and Special Sen- sor Microwave/Imager ARTIST Sea Ice (SSM/I-ASI) sea ice concentrations for the winters of 1992 to 2022 are used for the analyses. Two focus regions are identified for which trends are largest. In the western Nansen Basin (WNB), sea ice cover decreased by − 10 % per decade with especially large open water areas in 2022, and temperature and humidity increased by up to 3.7 K and 0.29 g kg −1 per decade, respectively. In the Greenland sea region (GRL), trends were slightly smaller, with −4.7 % per decade for sea ice and up to 1.3 K and 0.15 g kg −1 per decade for temperature and humidity. Trends for wind speed were mostly not significant. As a next step, two typical flow directions for this region were studied: cold-air outbreaks with northerly winds origi- nating from ice covered areas (off-ice flow) and warm-air in- trusions with southerly winds from open ocean regions (on- ice flow). To identify possible relationships between sea ice changes and atmospheric trends, correlation maps were cal- culated, and the results for off- and on-ice flow were com- pared. Up to two thirds of the observed temperature and hu- midity variability in both regions are related to upstream sea ice variability and an influence of sea ice cover is still present up to 500 km downstream of the ice edge. In the marginal sea ice zone the impact of a decreasing sea ice cover in this region is largest for off-ice flow conditions during cold-air outbreaks. Article in Journal/Newspaper Arctic Fram Strait Greenland Greenland Sea Nansen Basin Sea ice The Cryosphere ice covered areas Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Greenland Merra ENVELOPE(12.615,12.615,65.816,65.816) The Cryosphere 17 8 3115 3136 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Arctic sea ice has declined in all seasons accompanied by rapid atmospheric warming. Here, the focus lies on the wider Fram Strait region where the connection between trends in observed near-surface variables (temperature, humidity, wind speed) and local sea ice conditions are analyzed. Reanalysis data from ERA5 and MERRA-2 and Special Sen- sor Microwave/Imager ARTIST Sea Ice (SSM/I-ASI) sea ice concentrations for the winters of 1992 to 2022 are used for the analyses. Two focus regions are identified for which trends are largest. In the western Nansen Basin (WNB), sea ice cover decreased by − 10 % per decade with especially large open water areas in 2022, and temperature and humidity increased by up to 3.7 K and 0.29 g kg −1 per decade, respectively. In the Greenland sea region (GRL), trends were slightly smaller, with −4.7 % per decade for sea ice and up to 1.3 K and 0.15 g kg −1 per decade for temperature and humidity. Trends for wind speed were mostly not significant. As a next step, two typical flow directions for this region were studied: cold-air outbreaks with northerly winds origi- nating from ice covered areas (off-ice flow) and warm-air in- trusions with southerly winds from open ocean regions (on- ice flow). To identify possible relationships between sea ice changes and atmospheric trends, correlation maps were cal- culated, and the results for off- and on-ice flow were com- pared. Up to two thirds of the observed temperature and hu- midity variability in both regions are related to upstream sea ice variability and an influence of sea ice cover is still present up to 500 km downstream of the ice edge. In the marginal sea ice zone the impact of a decreasing sea ice cover in this region is largest for off-ice flow conditions during cold-air outbreaks. |
format |
Article in Journal/Newspaper |
author |
Schmitt, Amelie U Lüpkes, Christof |
spellingShingle |
Schmitt, Amelie U Lüpkes, Christof Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions |
author_facet |
Schmitt, Amelie U Lüpkes, Christof |
author_sort |
Schmitt, Amelie U |
title |
Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions |
title_short |
Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions |
title_full |
Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions |
title_fullStr |
Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions |
title_full_unstemmed |
Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions |
title_sort |
attributing near-surface atmospheric trends in the fram strait region to regional sea ice conditions |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/57926/ https://epic.awi.de/id/eprint/57926/1/Schmitt_Lupkes_2023.pdf https://hdl.handle.net/10013/epic.cb32b1c2-cb1e-4e92-8804-4c8f20bc1228 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Arctic Greenland Merra |
geographic_facet |
Arctic Greenland Merra |
genre |
Arctic Fram Strait Greenland Greenland Sea Nansen Basin Sea ice The Cryosphere ice covered areas |
genre_facet |
Arctic Fram Strait Greenland Greenland Sea Nansen Basin Sea ice The Cryosphere ice covered areas |
op_source |
EPIC3The Cryosphere, Copernicus Publications, 17, pp. 3115-3136 |
op_relation |
https://epic.awi.de/id/eprint/57926/1/Schmitt_Lupkes_2023.pdf Schmitt, A. U. and Lüpkes, C. orcid:0000-0001-6518-0717 (2023) Attributing near-surface atmospheric trends in the Fram Strait region to regional sea ice conditions , The Cryosphere, 17 , pp. 3115-3136 . doi:10.5194/tc-17-3115-2023 <https://doi.org/10.5194/tc-17-3115-2023> , hdl:10013/epic.cb32b1c2-cb1e-4e92-8804-4c8f20bc1228 |
op_doi |
https://doi.org/10.5194/tc-17-3115-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
8 |
container_start_page |
3115 |
op_container_end_page |
3136 |
_version_ |
1778136347408596992 |