Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium
Oceanic heat transport variations, carried by the northward-flowing Atlantic Water, strongly influence Arctic sea-ice distribution, ocean-atmosphere exchanges, and pan-Arctic temperatures. Palaeoceanographic reconstructions from marine sediments near Fram Strait have documented a dramatic increase i...
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Online Access: | http://hdl.handle.net/10278/3711203 https://doi.org/10.5194/cp-10-2201-2014 http://www.clim-past.net/volumes_and_issues.html |
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ftuniveneziairis:oai:iris.unive.it:10278/3711203 2024-04-14T08:06:17+00:00 Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium Jungclaus, J. H. Lohmann, K. Zanchettin, D. Jungclaus, J. H. Lohmann, K. Zanchettin, D. 2014 http://hdl.handle.net/10278/3711203 https://doi.org/10.5194/cp-10-2201-2014 http://www.clim-past.net/volumes_and_issues.html eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000347569500014 volume:10 issue:6 firstpage:2201 lastpage:2213 numberofpages:13 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3711203 doi:10.5194/cp-10-2201-2014 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84918589268 http://www.clim-past.net/volumes_and_issues.html info:eu-repo/semantics/openAccess Global and Planetary Change Stratigraphy Paleontology Settore GEO/12 - Oceanografia e Fisica dell'Atmosfera info:eu-repo/semantics/article 2014 ftuniveneziairis https://doi.org/10.5194/cp-10-2201-2014 2024-03-21T18:13:58Z Oceanic heat transport variations, carried by the northward-flowing Atlantic Water, strongly influence Arctic sea-ice distribution, ocean-atmosphere exchanges, and pan-Arctic temperatures. Palaeoceanographic reconstructions from marine sediments near Fram Strait have documented a dramatic increase in Atlantic Water temperatures over the 20th century, unprecedented in the last millennium. Here we present results from Earth system model simulations that reproduce and explain the reconstructed exceptional Atlantic Water warming in Fram Strait in the 20th century in the context of natural variability during the last millennium. The associated increase in ocean heat transfer to the Arctic can be traced back to changes in the ocean circulation in the subpolar North Atlantic. An interplay between a weakening overturning circulation and a strengthening subpolar gyre as a consequence of 20th-century global warming is identified as the driving mechanism for the pronounced warming along the Atlantic Water path toward the Arctic. Simulations covering the late Holocene provide a reference frame that allows us to conclude that the changes during the last century are unprecedented in the last 1150 years and that they cannot be explained by internal variability or natural forcing alone. Article in Journal/Newspaper Arctic Fram Strait Global warming North Atlantic Sea ice Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Arctic Climate of the Past 10 6 2201 2213 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Global and Planetary Change Stratigraphy Paleontology Settore GEO/12 - Oceanografia e Fisica dell'Atmosfera |
spellingShingle |
Global and Planetary Change Stratigraphy Paleontology Settore GEO/12 - Oceanografia e Fisica dell'Atmosfera Jungclaus, J. H. Lohmann, K. Zanchettin, D. Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium |
topic_facet |
Global and Planetary Change Stratigraphy Paleontology Settore GEO/12 - Oceanografia e Fisica dell'Atmosfera |
description |
Oceanic heat transport variations, carried by the northward-flowing Atlantic Water, strongly influence Arctic sea-ice distribution, ocean-atmosphere exchanges, and pan-Arctic temperatures. Palaeoceanographic reconstructions from marine sediments near Fram Strait have documented a dramatic increase in Atlantic Water temperatures over the 20th century, unprecedented in the last millennium. Here we present results from Earth system model simulations that reproduce and explain the reconstructed exceptional Atlantic Water warming in Fram Strait in the 20th century in the context of natural variability during the last millennium. The associated increase in ocean heat transfer to the Arctic can be traced back to changes in the ocean circulation in the subpolar North Atlantic. An interplay between a weakening overturning circulation and a strengthening subpolar gyre as a consequence of 20th-century global warming is identified as the driving mechanism for the pronounced warming along the Atlantic Water path toward the Arctic. Simulations covering the late Holocene provide a reference frame that allows us to conclude that the changes during the last century are unprecedented in the last 1150 years and that they cannot be explained by internal variability or natural forcing alone. |
author2 |
Jungclaus, J. H. Lohmann, K. Zanchettin, D. |
format |
Article in Journal/Newspaper |
author |
Jungclaus, J. H. Lohmann, K. Zanchettin, D. |
author_facet |
Jungclaus, J. H. Lohmann, K. Zanchettin, D. |
author_sort |
Jungclaus, J. H. |
title |
Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium |
title_short |
Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium |
title_full |
Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium |
title_fullStr |
Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium |
title_full_unstemmed |
Enhanced 20th-century heat transfer to the Arctic simulated in the context of climate variations over the last millennium |
title_sort |
enhanced 20th-century heat transfer to the arctic simulated in the context of climate variations over the last millennium |
publishDate |
2014 |
url |
http://hdl.handle.net/10278/3711203 https://doi.org/10.5194/cp-10-2201-2014 http://www.clim-past.net/volumes_and_issues.html |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Fram Strait Global warming North Atlantic Sea ice |
genre_facet |
Arctic Fram Strait Global warming North Atlantic Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000347569500014 volume:10 issue:6 firstpage:2201 lastpage:2213 numberofpages:13 journal:CLIMATE OF THE PAST http://hdl.handle.net/10278/3711203 doi:10.5194/cp-10-2201-2014 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84918589268 http://www.clim-past.net/volumes_and_issues.html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-10-2201-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
6 |
container_start_page |
2201 |
op_container_end_page |
2213 |
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