Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent
The effect of Arctic sea ice loss on the boreal winter regional trends of wind speed and latitudinal position of the Northern Hemisphere subtropical jet stream (STJ) in 1980–2012 is investigated. Two sets of global simulations with reduced Arctic sea ice extent are analyzed: simulations that, south...
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Online Access: | https://doi.org/10.3390/cli10070108 |
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ftmdpi:oai:mdpi.com:/2225-1154/10/7/108/ 2023-08-20T04:03:26+02:00 Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent José Luis Rodriguez Solis Cuauhtémoc Turrent Markus Gross agris 2022-07-16 application/pdf https://doi.org/10.3390/cli10070108 EN eng Multidisciplinary Digital Publishing Institute Climate Dynamics and Modelling https://dx.doi.org/10.3390/cli10070108 https://creativecommons.org/licenses/by/4.0/ Climate; Volume 10; Issue 7; Pages: 108 subtropical jet stream arctic warming global circulation model climate variability Text 2022 ftmdpi https://doi.org/10.3390/cli10070108 2023-08-01T05:44:02Z The effect of Arctic sea ice loss on the boreal winter regional trends of wind speed and latitudinal position of the Northern Hemisphere subtropical jet stream (STJ) in 1980–2012 is investigated. Two sets of global simulations with reduced Arctic sea ice extent are analyzed: simulations that, south of 70 N, use a climatological annual cycle of the sea surface temperature (SST) and a second set that uses full SST variability. Results with the climatological SST have a significant but weak response of the STJ wind speed and latitudinal position to the warmer Arctic: the wind speed generally decreases and the jet core is displaced equatorward. However, in the realistic SST simulations, the effect of Arctic warming is only slightly evident in a small equatorward shift of the jet over the Atlantic basin. Over the Pacific basin the STJ is mostly driven by tropical and mid-latitude SST variability, with little influence from the Arctic region. A weakening and poleward shift of the STJ that is observed in the realistic SST simulations over the Pacific basin is attributed to negative SST trends in the tropical Pacific and the consequent weakening of the mid-latitude meridional gradient of geopotential height in the upper troposphere. Text Arctic Sea ice MDPI Open Access Publishing Arctic Pacific Climate 10 7 108 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
subtropical jet stream arctic warming global circulation model climate variability |
spellingShingle |
subtropical jet stream arctic warming global circulation model climate variability José Luis Rodriguez Solis Cuauhtémoc Turrent Markus Gross Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent |
topic_facet |
subtropical jet stream arctic warming global circulation model climate variability |
description |
The effect of Arctic sea ice loss on the boreal winter regional trends of wind speed and latitudinal position of the Northern Hemisphere subtropical jet stream (STJ) in 1980–2012 is investigated. Two sets of global simulations with reduced Arctic sea ice extent are analyzed: simulations that, south of 70 N, use a climatological annual cycle of the sea surface temperature (SST) and a second set that uses full SST variability. Results with the climatological SST have a significant but weak response of the STJ wind speed and latitudinal position to the warmer Arctic: the wind speed generally decreases and the jet core is displaced equatorward. However, in the realistic SST simulations, the effect of Arctic warming is only slightly evident in a small equatorward shift of the jet over the Atlantic basin. Over the Pacific basin the STJ is mostly driven by tropical and mid-latitude SST variability, with little influence from the Arctic region. A weakening and poleward shift of the STJ that is observed in the realistic SST simulations over the Pacific basin is attributed to negative SST trends in the tropical Pacific and the consequent weakening of the mid-latitude meridional gradient of geopotential height in the upper troposphere. |
format |
Text |
author |
José Luis Rodriguez Solis Cuauhtémoc Turrent Markus Gross |
author_facet |
José Luis Rodriguez Solis Cuauhtémoc Turrent Markus Gross |
author_sort |
José Luis Rodriguez Solis |
title |
Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent |
title_short |
Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent |
title_full |
Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent |
title_fullStr |
Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent |
title_full_unstemmed |
Regional Responses of the Northern Hemisphere Subtropical Jet Stream to Reduced Arctic Sea Ice Extent |
title_sort |
regional responses of the northern hemisphere subtropical jet stream to reduced arctic sea ice extent |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/cli10070108 |
op_coverage |
agris |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Climate; Volume 10; Issue 7; Pages: 108 |
op_relation |
Climate Dynamics and Modelling https://dx.doi.org/10.3390/cli10070108 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/cli10070108 |
container_title |
Climate |
container_volume |
10 |
container_issue |
7 |
container_start_page |
108 |
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1774713802160340992 |