Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux
Arctic amplification is a consequence of surface albedo, cloud, and temperature feedbacks, as well as poleward oceanic and atmospheric heat transport. However, the relative impact of changes in sea surface temperature (SST) patterns and ocean heat flux sourced from different regions on Arctic temper...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/282814 2023-08-20T03:59:16+02:00 Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux Praetorius, Summer Rugenstein, Maria Persad, Geeta Caldeira, Ken 2018-08-07 application/application/pdf https://hdl.handle.net/20.500.11850/282814 https://doi.org/10.3929/ethz-b-000282814 en eng Nature info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-018-05337-8 info:eu-repo/semantics/altIdentifier/wos/000440981600001 http://hdl.handle.net/20.500.11850/282814 doi:10.3929/ethz-b-000282814 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International Nature Communications, 9 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftethz https://doi.org/20.500.11850/28281410.3929/ethz-b-00028281410.1038/s41467-018-05337-8 2023-07-30T23:48:10Z Arctic amplification is a consequence of surface albedo, cloud, and temperature feedbacks, as well as poleward oceanic and atmospheric heat transport. However, the relative impact of changes in sea surface temperature (SST) patterns and ocean heat flux sourced from different regions on Arctic temperatures are not well constrained. We modify ocean-to-atmosphere heat fluxes in the North Pacific and North Atlantic in a climate model to determine the sensitivity of Arctic temperatures to zonal heterogeneities in northern hemisphere SST patterns. Both positive and negative ocean heat flux perturbations from the North Pacific result in greater global and Arctic surface air temperature anomalies than equivalent magnitude perturbations from the North Atlantic; a response we primarily attribute to greater moisture flux from the subpolar extratropics to Arctic. Enhanced poleward latent heat and moisture transport drive sea-ice retreat and low-cloud formation in the Arctic, amplifying Arctic surface warming through the ice-albedo feedback and infrared warming effect of low clouds. Our results imply that global climate sensitivity may be dependent on patterns of ocean heat flux in the northern hemisphere. ISSN:2041-1723 Article in Journal/Newspaper albedo Arctic North Atlantic Sea ice ETH Zürich Research Collection Arctic Pacific |
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Open Polar |
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ETH Zürich Research Collection |
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language |
English |
description |
Arctic amplification is a consequence of surface albedo, cloud, and temperature feedbacks, as well as poleward oceanic and atmospheric heat transport. However, the relative impact of changes in sea surface temperature (SST) patterns and ocean heat flux sourced from different regions on Arctic temperatures are not well constrained. We modify ocean-to-atmosphere heat fluxes in the North Pacific and North Atlantic in a climate model to determine the sensitivity of Arctic temperatures to zonal heterogeneities in northern hemisphere SST patterns. Both positive and negative ocean heat flux perturbations from the North Pacific result in greater global and Arctic surface air temperature anomalies than equivalent magnitude perturbations from the North Atlantic; a response we primarily attribute to greater moisture flux from the subpolar extratropics to Arctic. Enhanced poleward latent heat and moisture transport drive sea-ice retreat and low-cloud formation in the Arctic, amplifying Arctic surface warming through the ice-albedo feedback and infrared warming effect of low clouds. Our results imply that global climate sensitivity may be dependent on patterns of ocean heat flux in the northern hemisphere. ISSN:2041-1723 |
format |
Article in Journal/Newspaper |
author |
Praetorius, Summer Rugenstein, Maria Persad, Geeta Caldeira, Ken |
spellingShingle |
Praetorius, Summer Rugenstein, Maria Persad, Geeta Caldeira, Ken Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux |
author_facet |
Praetorius, Summer Rugenstein, Maria Persad, Geeta Caldeira, Ken |
author_sort |
Praetorius, Summer |
title |
Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux |
title_short |
Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux |
title_full |
Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux |
title_fullStr |
Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux |
title_full_unstemmed |
Global and Arctic climate sensitivity enhanced by changes in North Pacific heat flux |
title_sort |
global and arctic climate sensitivity enhanced by changes in north pacific heat flux |
publisher |
Nature |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11850/282814 https://doi.org/10.3929/ethz-b-000282814 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
albedo Arctic North Atlantic Sea ice |
genre_facet |
albedo Arctic North Atlantic Sea ice |
op_source |
Nature Communications, 9 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-018-05337-8 info:eu-repo/semantics/altIdentifier/wos/000440981600001 http://hdl.handle.net/20.500.11850/282814 doi:10.3929/ethz-b-000282814 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_doi |
https://doi.org/20.500.11850/28281410.3929/ethz-b-00028281410.1038/s41467-018-05337-8 |
_version_ |
1774724848666279936 |