Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets
In this study, warm and moist air intrusions (WaMAIs) over the Arctic Ocean sectors of Barents Sea, Kara Sea, Laptev Sea, East Siberian Sea, Chukchi Sea, and Beaufort Sea in 40 recent winters (from 1979 to 2018) are identified from the ERA5 reanalysis using both Eulerian and Lagrangian views. The an...
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2022
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Online Access: | https://doi.org/10.5194/acp-22-8037-2022 https://doaj.org/article/d4e3a4758fca40f7ab95d4e3b0ee6bdd |
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ftdoajarticles:oai:doaj.org/article:d4e3a4758fca40f7ab95d4e3b0ee6bdd 2023-05-15T14:53:12+02:00 Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets C. You M. Tjernström A. Devasthale 2022-06-01T00:00:00Z https://doi.org/10.5194/acp-22-8037-2022 https://doaj.org/article/d4e3a4758fca40f7ab95d4e3b0ee6bdd EN eng Copernicus Publications https://acp.copernicus.org/articles/22/8037/2022/acp-22-8037-2022.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-22-8037-2022 1680-7316 1680-7324 https://doaj.org/article/d4e3a4758fca40f7ab95d4e3b0ee6bdd Atmospheric Chemistry and Physics, Vol 22, Pp 8037-8057 (2022) Physics QC1-999 Chemistry QD1-999 article 2022 ftdoajarticles https://doi.org/10.5194/acp-22-8037-2022 2022-12-31T03:03:28Z In this study, warm and moist air intrusions (WaMAIs) over the Arctic Ocean sectors of Barents Sea, Kara Sea, Laptev Sea, East Siberian Sea, Chukchi Sea, and Beaufort Sea in 40 recent winters (from 1979 to 2018) are identified from the ERA5 reanalysis using both Eulerian and Lagrangian views. The analysis shows that WaMAIs, fueled by Arctic blocking, cause a relative surface warming and hence a sea-ice reduction by exerting positive anomalies of net thermal irradiances and turbulent fluxes on the surface. Over Arctic Ocean sectors with land-locked sea ice in winter, such as Laptev Sea, East Siberian Sea, Chukchi Sea, and Beaufort Sea, the total surface energy-budget is dominated by net thermal irradiance. From a Lagrangian perspective, total water path (TWP) increases linearly with the downstream distance from the sea-ice edge over the completely ice-covered sectors, inducing almost linearly increasing net thermal irradiance and total surface energy-budget. However, over the Barents Sea, with an open ocean to the south, total net surface energy-budget is dominated by the surface turbulent flux. With the energy in the warm-and-moist air continuously transported to the surface, net surface turbulent flux gradually decreases with distance, especially within the first 2 ∘ north of the ice edge, inducing a decreasing but still positive total surface energy-budget. The boundary-layer energy-budget patterns over the Barents Sea can be categorized into three classes: radiation-dominated, turbulence-dominated, and turbulence-dominated with cold dome, comprising about 52 %, 40 %, and 8 % of all WaMAIs, respectively. Statistically, turbulence-dominated cases with or without cold dome occur along with 1 order of magnitude larger large-scale subsidence than the radiation-dominated cases. For the turbulence-dominated category, larger turbulent fluxes are exerted to the surface, probably because of stronger wind shear. In radiation-dominated WaMAIs, stratocumulus develops more strongly and triggers intensive cloud-top ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Beaufort Sea Chukchi Chukchi Sea East Siberian Sea Kara Sea laptev Laptev Sea Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Barents Sea Laptev Sea Kara Sea Chukchi Sea East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Atmospheric Chemistry and Physics 22 12 8037 8057 |
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Open Polar |
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topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 C. You M. Tjernström A. Devasthale Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
In this study, warm and moist air intrusions (WaMAIs) over the Arctic Ocean sectors of Barents Sea, Kara Sea, Laptev Sea, East Siberian Sea, Chukchi Sea, and Beaufort Sea in 40 recent winters (from 1979 to 2018) are identified from the ERA5 reanalysis using both Eulerian and Lagrangian views. The analysis shows that WaMAIs, fueled by Arctic blocking, cause a relative surface warming and hence a sea-ice reduction by exerting positive anomalies of net thermal irradiances and turbulent fluxes on the surface. Over Arctic Ocean sectors with land-locked sea ice in winter, such as Laptev Sea, East Siberian Sea, Chukchi Sea, and Beaufort Sea, the total surface energy-budget is dominated by net thermal irradiance. From a Lagrangian perspective, total water path (TWP) increases linearly with the downstream distance from the sea-ice edge over the completely ice-covered sectors, inducing almost linearly increasing net thermal irradiance and total surface energy-budget. However, over the Barents Sea, with an open ocean to the south, total net surface energy-budget is dominated by the surface turbulent flux. With the energy in the warm-and-moist air continuously transported to the surface, net surface turbulent flux gradually decreases with distance, especially within the first 2 ∘ north of the ice edge, inducing a decreasing but still positive total surface energy-budget. The boundary-layer energy-budget patterns over the Barents Sea can be categorized into three classes: radiation-dominated, turbulence-dominated, and turbulence-dominated with cold dome, comprising about 52 %, 40 %, and 8 % of all WaMAIs, respectively. Statistically, turbulence-dominated cases with or without cold dome occur along with 1 order of magnitude larger large-scale subsidence than the radiation-dominated cases. For the turbulence-dominated category, larger turbulent fluxes are exerted to the surface, probably because of stronger wind shear. In radiation-dominated WaMAIs, stratocumulus develops more strongly and triggers intensive cloud-top ... |
format |
Article in Journal/Newspaper |
author |
C. You M. Tjernström A. Devasthale |
author_facet |
C. You M. Tjernström A. Devasthale |
author_sort |
C. You |
title |
Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets |
title_short |
Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets |
title_full |
Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets |
title_fullStr |
Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets |
title_full_unstemmed |
Warm and moist air intrusions into the winter Arctic: a Lagrangian view on the near-surface energy budgets |
title_sort |
warm and moist air intrusions into the winter arctic: a lagrangian view on the near-surface energy budgets |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/acp-22-8037-2022 https://doaj.org/article/d4e3a4758fca40f7ab95d4e3b0ee6bdd |
long_lat |
ENVELOPE(166.000,166.000,74.000,74.000) |
geographic |
Arctic Arctic Ocean Barents Sea Laptev Sea Kara Sea Chukchi Sea East Siberian Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea Laptev Sea Kara Sea Chukchi Sea East Siberian Sea |
genre |
Arctic Arctic Ocean Barents Sea Beaufort Sea Chukchi Chukchi Sea East Siberian Sea Kara Sea laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Barents Sea Beaufort Sea Chukchi Chukchi Sea East Siberian Sea Kara Sea laptev Laptev Sea Sea ice |
op_source |
Atmospheric Chemistry and Physics, Vol 22, Pp 8037-8057 (2022) |
op_relation |
https://acp.copernicus.org/articles/22/8037/2022/acp-22-8037-2022.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-22-8037-2022 1680-7316 1680-7324 https://doaj.org/article/d4e3a4758fca40f7ab95d4e3b0ee6bdd |
op_doi |
https://doi.org/10.5194/acp-22-8037-2022 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
22 |
container_issue |
12 |
container_start_page |
8037 |
op_container_end_page |
8057 |
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1766324613625675776 |