Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts
To explore the mechanisms linking Arctic sea ice loss to changes in midlatitude surface temperatures, we conduct idealized modeling experiments using an intermediate general circulation model and with sea ice loss confined to the Atlantic or Pacific sectors of the Arctic (Barents‐Kara or Chukchi‐Ber...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:169035 2023-05-15T14:25:13+02:00 Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts McKenna, CM Bracegirdle, TJ Shuckburgh, EF Haynes, PH Joshi, MM 2018-01-28 text https://eprints.whiterose.ac.uk/169035/ https://eprints.whiterose.ac.uk/169035/1/2017GL076433.pdf en eng American Geophysical Union (AGU) https://eprints.whiterose.ac.uk/169035/1/2017GL076433.pdf McKenna, CM orcid.org/0000-0002-9677-4582 , Bracegirdle, TJ, Shuckburgh, EF et al. (2 more authors) (2018) Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts. Geophysical Research Letters, 45 (2). pp. 945-954. ISSN 0094-8276 Article NonPeerReviewed 2018 ftleedsuniv 2023-01-30T22:35:12Z To explore the mechanisms linking Arctic sea ice loss to changes in midlatitude surface temperatures, we conduct idealized modeling experiments using an intermediate general circulation model and with sea ice loss confined to the Atlantic or Pacific sectors of the Arctic (Barents‐Kara or Chukchi‐Bering Seas). Extending previous findings, there are opposite effects on the winter stratospheric polar vortex for both large‐magnitude (late 21st century) and moderate‐magnitude sea ice loss. Accordingly, there are opposite tropospheric Arctic Oscillation (AO) responses for moderate‐magnitude sea ice loss. However, there are similar strength negative AO responses for large‐magnitude sea ice loss, suggesting that tropospheric mechanisms become relatively more important than stratospheric mechanisms as the sea ice loss magnitude increases. The midlatitude surface temperature response for each loss region and magnitude can be understood as the combination of an “indirect” part induced by the large‐scale circulation (AO) response, and a residual “direct” part that is local to the loss region. Article in Journal/Newspaper Arctic Arctic Chukchi Sea ice White Rose Research Online (Universities of Leeds, Sheffield & York) Arctic Pacific |
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Open Polar |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
description |
To explore the mechanisms linking Arctic sea ice loss to changes in midlatitude surface temperatures, we conduct idealized modeling experiments using an intermediate general circulation model and with sea ice loss confined to the Atlantic or Pacific sectors of the Arctic (Barents‐Kara or Chukchi‐Bering Seas). Extending previous findings, there are opposite effects on the winter stratospheric polar vortex for both large‐magnitude (late 21st century) and moderate‐magnitude sea ice loss. Accordingly, there are opposite tropospheric Arctic Oscillation (AO) responses for moderate‐magnitude sea ice loss. However, there are similar strength negative AO responses for large‐magnitude sea ice loss, suggesting that tropospheric mechanisms become relatively more important than stratospheric mechanisms as the sea ice loss magnitude increases. The midlatitude surface temperature response for each loss region and magnitude can be understood as the combination of an “indirect” part induced by the large‐scale circulation (AO) response, and a residual “direct” part that is local to the loss region. |
format |
Article in Journal/Newspaper |
author |
McKenna, CM Bracegirdle, TJ Shuckburgh, EF Haynes, PH Joshi, MM |
spellingShingle |
McKenna, CM Bracegirdle, TJ Shuckburgh, EF Haynes, PH Joshi, MM Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts |
author_facet |
McKenna, CM Bracegirdle, TJ Shuckburgh, EF Haynes, PH Joshi, MM |
author_sort |
McKenna, CM |
title |
Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts |
title_short |
Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts |
title_full |
Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts |
title_fullStr |
Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts |
title_full_unstemmed |
Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts |
title_sort |
arctic sea ice loss in different regions leads to contrasting northern hemisphere impacts |
publisher |
American Geophysical Union (AGU) |
publishDate |
2018 |
url |
https://eprints.whiterose.ac.uk/169035/ https://eprints.whiterose.ac.uk/169035/1/2017GL076433.pdf |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Arctic Chukchi Sea ice |
genre_facet |
Arctic Arctic Chukchi Sea ice |
op_relation |
https://eprints.whiterose.ac.uk/169035/1/2017GL076433.pdf McKenna, CM orcid.org/0000-0002-9677-4582 , Bracegirdle, TJ, Shuckburgh, EF et al. (2 more authors) (2018) Arctic Sea Ice Loss in Different Regions Leads to Contrasting Northern Hemisphere Impacts. Geophysical Research Letters, 45 (2). pp. 945-954. ISSN 0094-8276 |
_version_ |
1766297660122202112 |