Amplified wintertime Barents Sea warming linked to intensified Barents oscillation
Abstract In recent decades, the Barents Sea has warmed more than twice as fast as the rest of the Arctic in winter, but the exact causes behind this amplified warming remain unclear. In this study, we quantify the wintertime Barents Sea warming (BSW, for near-surface air temperature) with an average...
Published in: | Environmental Research Letters |
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Online Access: | http://dx.doi.org/10.1088/1748-9326/ac5bb3 https://iopscience.iop.org/article/10.1088/1748-9326/ac5bb3 https://iopscience.iop.org/article/10.1088/1748-9326/ac5bb3/pdf |
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crioppubl:10.1088/1748-9326/ac5bb3 2024-06-23T07:50:37+00:00 Amplified wintertime Barents Sea warming linked to intensified Barents oscillation Cai, Ziyi You, Qinglong Chen, Hans W Zhang, Ruonan Chen, Deliang Chen, Jinlei Kang, Shichang Cohen, Judah National Natural Science Foundation of China Swedish Foundation for International Cooperation in Research and Higher Education 2022 http://dx.doi.org/10.1088/1748-9326/ac5bb3 https://iopscience.iop.org/article/10.1088/1748-9326/ac5bb3 https://iopscience.iop.org/article/10.1088/1748-9326/ac5bb3/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 17, issue 4, page 044068 ISSN 1748-9326 journal-article 2022 crioppubl https://doi.org/10.1088/1748-9326/ac5bb3 2024-06-10T04:11:21Z Abstract In recent decades, the Barents Sea has warmed more than twice as fast as the rest of the Arctic in winter, but the exact causes behind this amplified warming remain unclear. In this study, we quantify the wintertime Barents Sea warming (BSW, for near-surface air temperature) with an average linear trend of 1.74 °C decade −1 and an interdecadal change around 2003 based on a surface energy budget analysis using the ERA5 reanalysis dataset from 1979–2019. Our analysis suggests that the interdecadal change in the wintertime near-surface air temperature is dominated by enhanced clear-sky downward longwave radiation (CDLW) associated with increased total column water vapor. Furthermore, it is found that a mode of atmospheric variability over the North Atlantic region known as the Barents oscillation (BO) strongly contributed to the BSW with a stepwise jump in 2003. Since 2003, the BO turned into a strengthened and positive phase, characteristic of anomalous high pressure over the North Atlantic and South of the Barents Sea, which promoted two branches of heat and moisture transport from southern Greenland along the Norwegian Sea and from the Eurasian continent to the Barents Sea. This enhanced the water vapor convergence over the Barents Sea, resulting in BSW through enhanced CDLW. Our results highlight the atmospheric circulation related to the BO as an emerging driver of the wintertime BSW through enhanced meridional atmospheric heat and moisture transport over the North Atlantic Ocean. Article in Journal/Newspaper Arctic Barents Sea Greenland North Atlantic Norwegian Sea IOP Publishing Arctic Barents Sea Norwegian Sea Greenland Environmental Research Letters |
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Abstract In recent decades, the Barents Sea has warmed more than twice as fast as the rest of the Arctic in winter, but the exact causes behind this amplified warming remain unclear. In this study, we quantify the wintertime Barents Sea warming (BSW, for near-surface air temperature) with an average linear trend of 1.74 °C decade −1 and an interdecadal change around 2003 based on a surface energy budget analysis using the ERA5 reanalysis dataset from 1979–2019. Our analysis suggests that the interdecadal change in the wintertime near-surface air temperature is dominated by enhanced clear-sky downward longwave radiation (CDLW) associated with increased total column water vapor. Furthermore, it is found that a mode of atmospheric variability over the North Atlantic region known as the Barents oscillation (BO) strongly contributed to the BSW with a stepwise jump in 2003. Since 2003, the BO turned into a strengthened and positive phase, characteristic of anomalous high pressure over the North Atlantic and South of the Barents Sea, which promoted two branches of heat and moisture transport from southern Greenland along the Norwegian Sea and from the Eurasian continent to the Barents Sea. This enhanced the water vapor convergence over the Barents Sea, resulting in BSW through enhanced CDLW. Our results highlight the atmospheric circulation related to the BO as an emerging driver of the wintertime BSW through enhanced meridional atmospheric heat and moisture transport over the North Atlantic Ocean. |
author2 |
National Natural Science Foundation of China Swedish Foundation for International Cooperation in Research and Higher Education |
format |
Article in Journal/Newspaper |
author |
Cai, Ziyi You, Qinglong Chen, Hans W Zhang, Ruonan Chen, Deliang Chen, Jinlei Kang, Shichang Cohen, Judah |
spellingShingle |
Cai, Ziyi You, Qinglong Chen, Hans W Zhang, Ruonan Chen, Deliang Chen, Jinlei Kang, Shichang Cohen, Judah Amplified wintertime Barents Sea warming linked to intensified Barents oscillation |
author_facet |
Cai, Ziyi You, Qinglong Chen, Hans W Zhang, Ruonan Chen, Deliang Chen, Jinlei Kang, Shichang Cohen, Judah |
author_sort |
Cai, Ziyi |
title |
Amplified wintertime Barents Sea warming linked to intensified Barents oscillation |
title_short |
Amplified wintertime Barents Sea warming linked to intensified Barents oscillation |
title_full |
Amplified wintertime Barents Sea warming linked to intensified Barents oscillation |
title_fullStr |
Amplified wintertime Barents Sea warming linked to intensified Barents oscillation |
title_full_unstemmed |
Amplified wintertime Barents Sea warming linked to intensified Barents oscillation |
title_sort |
amplified wintertime barents sea warming linked to intensified barents oscillation |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/1748-9326/ac5bb3 https://iopscience.iop.org/article/10.1088/1748-9326/ac5bb3 https://iopscience.iop.org/article/10.1088/1748-9326/ac5bb3/pdf |
geographic |
Arctic Barents Sea Norwegian Sea Greenland |
geographic_facet |
Arctic Barents Sea Norwegian Sea Greenland |
genre |
Arctic Barents Sea Greenland North Atlantic Norwegian Sea |
genre_facet |
Arctic Barents Sea Greenland North Atlantic Norwegian Sea |
op_source |
Environmental Research Letters volume 17, issue 4, page 044068 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ac5bb3 |
container_title |
Environmental Research Letters |
_version_ |
1802641522267521024 |