Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction
Occupying about 14 % of the world's surface, the Southern Ocean plays a fundamental role in ocean and atmosphere circulation, carbon cycling and Antarctic ice-sheet dynamics. Unfortunately, high interannual variability and a dearth of instrumental observations before the 1950s limits our unders...
Published in: | Climate of the Past |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2017
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Online Access: | http://hdl.handle.net/10044/1/46007 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000396734600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202 https://doi.org/10.5194/cp-13-231-2017 |
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ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/46007 2023-05-15T13:51:33+02:00 Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction Turney, CSM Fogwill, CJ Palmer, JG Van Sebille, E Thomas, Z McGlone, M Richardson, S Wilmshurst, JM Fenwick, P Zunz, V Goosse, H Wilson, K-J Carter, L Lipson, M Jones, RT Harsch, M Clark, G Marzinelli, E Rogers, T Rainsley, E Ciasto, L Waterman, S Thomas, ER Visbeck, M 2017-02-15 http://hdl.handle.net/10044/1/46007 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000396734600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202 https://doi.org/10.5194/cp-13-231-2017 English eng Copernicus Publications CLIMATE OF THE PAST © 2017 Author(s). This work is distributed under the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/). CC-BY 248 231 Science & Technology Physical Sciences Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology HEMISPHERE SURFACE CLIMATE SEALS MIROUNGA-LEONINA ANNULAR MODE CAMPBELL-ISLAND NEW-ZEALAND POPULATION-DYNAMICS ROCKHOPPER PENGUINS MACQUARIE ISLAND WEST ANTARCTICA PAST MILLENNIUM Paleontology 0406 Physical Geography And Environmental Geoscience Journal Article 2017 ftimperialcol https://doi.org/10.5194/cp-13-231-2017 2018-09-16T05:58:43Z Occupying about 14 % of the world's surface, the Southern Ocean plays a fundamental role in ocean and atmosphere circulation, carbon cycling and Antarctic ice-sheet dynamics. Unfortunately, high interannual variability and a dearth of instrumental observations before the 1950s limits our understanding of how marine–atmosphere–ice domains interact on multi-decadal timescales and the impact of anthropogenic forcing. Here we integrate climate-sensitive tree growth with ocean and atmospheric observations on southwest Pacific subantarctic islands that lie at the boundary of polar and subtropical climates (52–54° S). Our annually resolved temperature reconstruction captures regional change since the 1870s and demonstrates a significant increase in variability from the 1940s, a phenomenon predating the observational record. Climate reanalysis and modelling show a parallel change in tropical Pacific sea surface temperatures that generate an atmospheric Rossby wave train which propagates across a large part of the Southern Hemisphere during the austral spring and summer. Our results suggest that modern observed high interannual variability was established across the mid-twentieth century, and that the influence of contemporary equatorial Pacific temperatures may now be a permanent feature across the mid- to high latitudes. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Macquarie Island Mirounga leonina Southern Ocean West Antarctica Imperial College London: Spiral Antarctic Austral Campbell Island ENVELOPE(169.500,169.500,-52.500,-52.500) New Zealand Pacific Southern Ocean West Antarctica Climate of the Past 13 3 231 248 |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
English |
topic |
Science & Technology Physical Sciences Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology HEMISPHERE SURFACE CLIMATE SEALS MIROUNGA-LEONINA ANNULAR MODE CAMPBELL-ISLAND NEW-ZEALAND POPULATION-DYNAMICS ROCKHOPPER PENGUINS MACQUARIE ISLAND WEST ANTARCTICA PAST MILLENNIUM Paleontology 0406 Physical Geography And Environmental Geoscience |
spellingShingle |
Science & Technology Physical Sciences Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology HEMISPHERE SURFACE CLIMATE SEALS MIROUNGA-LEONINA ANNULAR MODE CAMPBELL-ISLAND NEW-ZEALAND POPULATION-DYNAMICS ROCKHOPPER PENGUINS MACQUARIE ISLAND WEST ANTARCTICA PAST MILLENNIUM Paleontology 0406 Physical Geography And Environmental Geoscience Turney, CSM Fogwill, CJ Palmer, JG Van Sebille, E Thomas, Z McGlone, M Richardson, S Wilmshurst, JM Fenwick, P Zunz, V Goosse, H Wilson, K-J Carter, L Lipson, M Jones, RT Harsch, M Clark, G Marzinelli, E Rogers, T Rainsley, E Ciasto, L Waterman, S Thomas, ER Visbeck, M Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction |
topic_facet |
Science & Technology Physical Sciences Geosciences Multidisciplinary Meteorology & Atmospheric Sciences Geology HEMISPHERE SURFACE CLIMATE SEALS MIROUNGA-LEONINA ANNULAR MODE CAMPBELL-ISLAND NEW-ZEALAND POPULATION-DYNAMICS ROCKHOPPER PENGUINS MACQUARIE ISLAND WEST ANTARCTICA PAST MILLENNIUM Paleontology 0406 Physical Geography And Environmental Geoscience |
description |
Occupying about 14 % of the world's surface, the Southern Ocean plays a fundamental role in ocean and atmosphere circulation, carbon cycling and Antarctic ice-sheet dynamics. Unfortunately, high interannual variability and a dearth of instrumental observations before the 1950s limits our understanding of how marine–atmosphere–ice domains interact on multi-decadal timescales and the impact of anthropogenic forcing. Here we integrate climate-sensitive tree growth with ocean and atmospheric observations on southwest Pacific subantarctic islands that lie at the boundary of polar and subtropical climates (52–54° S). Our annually resolved temperature reconstruction captures regional change since the 1870s and demonstrates a significant increase in variability from the 1940s, a phenomenon predating the observational record. Climate reanalysis and modelling show a parallel change in tropical Pacific sea surface temperatures that generate an atmospheric Rossby wave train which propagates across a large part of the Southern Hemisphere during the austral spring and summer. Our results suggest that modern observed high interannual variability was established across the mid-twentieth century, and that the influence of contemporary equatorial Pacific temperatures may now be a permanent feature across the mid- to high latitudes. |
format |
Article in Journal/Newspaper |
author |
Turney, CSM Fogwill, CJ Palmer, JG Van Sebille, E Thomas, Z McGlone, M Richardson, S Wilmshurst, JM Fenwick, P Zunz, V Goosse, H Wilson, K-J Carter, L Lipson, M Jones, RT Harsch, M Clark, G Marzinelli, E Rogers, T Rainsley, E Ciasto, L Waterman, S Thomas, ER Visbeck, M |
author_facet |
Turney, CSM Fogwill, CJ Palmer, JG Van Sebille, E Thomas, Z McGlone, M Richardson, S Wilmshurst, JM Fenwick, P Zunz, V Goosse, H Wilson, K-J Carter, L Lipson, M Jones, RT Harsch, M Clark, G Marzinelli, E Rogers, T Rainsley, E Ciasto, L Waterman, S Thomas, ER Visbeck, M |
author_sort |
Turney, CSM |
title |
Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction |
title_short |
Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction |
title_full |
Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction |
title_fullStr |
Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction |
title_full_unstemmed |
Tropical forcing of increased Southern Ocean climate variability revealed by a 140-year subantarctic temperature reconstruction |
title_sort |
tropical forcing of increased southern ocean climate variability revealed by a 140-year subantarctic temperature reconstruction |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
http://hdl.handle.net/10044/1/46007 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000396734600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202 https://doi.org/10.5194/cp-13-231-2017 |
long_lat |
ENVELOPE(169.500,169.500,-52.500,-52.500) |
geographic |
Antarctic Austral Campbell Island New Zealand Pacific Southern Ocean West Antarctica |
geographic_facet |
Antarctic Austral Campbell Island New Zealand Pacific Southern Ocean West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Macquarie Island Mirounga leonina Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Macquarie Island Mirounga leonina Southern Ocean West Antarctica |
op_source |
248 231 |
op_relation |
CLIMATE OF THE PAST |
op_rights |
© 2017 Author(s). This work is distributed under the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/). |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-13-231-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
3 |
container_start_page |
231 |
op_container_end_page |
248 |
_version_ |
1766255463102414848 |