A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly
Subtropical and extratropical proxy records of wind field, sea level pressure (SLP), temperature and hydrological anomalies from South Africa, Australia/New Zealand, Patagonian South America and Antarctica were used to reconstruct the Indo-Pacific extratropical southern hemisphere sea-level pressure...
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/83236 2023-12-17T10:22:12+01:00 A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly Goodwin, I. Browning, S. Lorrey, A. Mayewski, P. Phipps, S. Bertler, N. Edwards, R. Cohen, T. van Ommen, T. Curran, M. Barr, C. Stager, J. 2014 http://hdl.handle.net/2440/83236 https://doi.org/10.1007/s00382-013-1899-1 en eng Springer http://purl.org/au-research/grants/arc/DP1092945 Climate Dynamics, 2014; 43(5-6):1197-1219 0930-7575 1432-0894 http://hdl.handle.net/2440/83236 doi:10.1007/s00382-013-1899-1 Barr, C. [0000-0003-0436-8702] © Springer-Verlag Berlin Heidelberg 2013 http://dx.doi.org/10.1007/s00382-013-1899-1 Medieval Climate Anomaly Extratropical Southern Annular Mode Pacific South American Mode Paleo-sea-level pressure reconstruction Journal article 2014 ftunivadelaidedl https://doi.org/10.1007/s00382-013-1899-1 2023-11-20T23:25:57Z Subtropical and extratropical proxy records of wind field, sea level pressure (SLP), temperature and hydrological anomalies from South Africa, Australia/New Zealand, Patagonian South America and Antarctica were used to reconstruct the Indo-Pacific extratropical southern hemisphere sea-level pressure anomaly (SLPa) fields for the Medieval Climate Anomaly (MCA ~700–1350 CE) and transition to the Little Ice Age (LIA 1350–1450 CE). The multivariate array of proxy data were simultaneously evaluated against global climate model output in order to identify climate state analogues that are most consistent with the majority of proxy data. The mean SLP and SLP anomaly patterns derived from these analogues illustrate the evolution of low frequency changes in the extratropics. The Indo-Pacific extratropical mean climate state was dominated by a strong tropical interaction with Antarctica emanating from: (1) the eastern Indian and south-west Pacific regions prior to 1100 CE, then, (2) the eastern Pacific evolving to the central Pacific La Niña-like pattern interacting with a +ve SAM to 1300 CE. A relatively abrupt shift to –ve SAM and the central Pacific El Niño-like pattern occurred at ~1300. A poleward (equatorward) shift in the subtropical ridge occurred during the MCA (MCA–LIA transition). The Hadley Cell expansion in the Australian and Southwest Pacific, region together with the poleward shift of the zonal westerlies is contemporaneous with previously reported Hadley Cell expansion in the North Pacific and Atlantic regions, and suggests that bipolar climate symmetry was a feature of the MCA. Ian D. Goodwin, Stuart Browning, Andrew M. Lorrey, Paul A. Mayewski, Steven J. Phipps, Nancy A. N. Bertler, Ross P. Edwards, Tim J. Cohen, Tas van Ommen, Mark Curran, Cameron Barr, J. Curt Stager Article in Journal/Newspaper Antarc* Antarctica The University of Adelaide: Digital Library Pacific Indian New Zealand Browning ENVELOPE(164.050,164.050,-74.617,-74.617) Goodwin ENVELOPE(-62.833,-62.833,-65.100,-65.100) Climate Dynamics 43 5-6 1197 1219 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Medieval Climate Anomaly Extratropical Southern Annular Mode Pacific South American Mode Paleo-sea-level pressure reconstruction |
spellingShingle |
Medieval Climate Anomaly Extratropical Southern Annular Mode Pacific South American Mode Paleo-sea-level pressure reconstruction Goodwin, I. Browning, S. Lorrey, A. Mayewski, P. Phipps, S. Bertler, N. Edwards, R. Cohen, T. van Ommen, T. Curran, M. Barr, C. Stager, J. A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly |
topic_facet |
Medieval Climate Anomaly Extratropical Southern Annular Mode Pacific South American Mode Paleo-sea-level pressure reconstruction |
description |
Subtropical and extratropical proxy records of wind field, sea level pressure (SLP), temperature and hydrological anomalies from South Africa, Australia/New Zealand, Patagonian South America and Antarctica were used to reconstruct the Indo-Pacific extratropical southern hemisphere sea-level pressure anomaly (SLPa) fields for the Medieval Climate Anomaly (MCA ~700–1350 CE) and transition to the Little Ice Age (LIA 1350–1450 CE). The multivariate array of proxy data were simultaneously evaluated against global climate model output in order to identify climate state analogues that are most consistent with the majority of proxy data. The mean SLP and SLP anomaly patterns derived from these analogues illustrate the evolution of low frequency changes in the extratropics. The Indo-Pacific extratropical mean climate state was dominated by a strong tropical interaction with Antarctica emanating from: (1) the eastern Indian and south-west Pacific regions prior to 1100 CE, then, (2) the eastern Pacific evolving to the central Pacific La Niña-like pattern interacting with a +ve SAM to 1300 CE. A relatively abrupt shift to –ve SAM and the central Pacific El Niño-like pattern occurred at ~1300. A poleward (equatorward) shift in the subtropical ridge occurred during the MCA (MCA–LIA transition). The Hadley Cell expansion in the Australian and Southwest Pacific, region together with the poleward shift of the zonal westerlies is contemporaneous with previously reported Hadley Cell expansion in the North Pacific and Atlantic regions, and suggests that bipolar climate symmetry was a feature of the MCA. Ian D. Goodwin, Stuart Browning, Andrew M. Lorrey, Paul A. Mayewski, Steven J. Phipps, Nancy A. N. Bertler, Ross P. Edwards, Tim J. Cohen, Tas van Ommen, Mark Curran, Cameron Barr, J. Curt Stager |
format |
Article in Journal/Newspaper |
author |
Goodwin, I. Browning, S. Lorrey, A. Mayewski, P. Phipps, S. Bertler, N. Edwards, R. Cohen, T. van Ommen, T. Curran, M. Barr, C. Stager, J. |
author_facet |
Goodwin, I. Browning, S. Lorrey, A. Mayewski, P. Phipps, S. Bertler, N. Edwards, R. Cohen, T. van Ommen, T. Curran, M. Barr, C. Stager, J. |
author_sort |
Goodwin, I. |
title |
A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly |
title_short |
A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly |
title_full |
A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly |
title_fullStr |
A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly |
title_full_unstemmed |
A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly |
title_sort |
reconstruction of extratropical indo-pacific sea-level pressure patterns during the medieval climate anomaly |
publisher |
Springer |
publishDate |
2014 |
url |
http://hdl.handle.net/2440/83236 https://doi.org/10.1007/s00382-013-1899-1 |
long_lat |
ENVELOPE(164.050,164.050,-74.617,-74.617) ENVELOPE(-62.833,-62.833,-65.100,-65.100) |
geographic |
Pacific Indian New Zealand Browning Goodwin |
geographic_facet |
Pacific Indian New Zealand Browning Goodwin |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://dx.doi.org/10.1007/s00382-013-1899-1 |
op_relation |
http://purl.org/au-research/grants/arc/DP1092945 Climate Dynamics, 2014; 43(5-6):1197-1219 0930-7575 1432-0894 http://hdl.handle.net/2440/83236 doi:10.1007/s00382-013-1899-1 Barr, C. [0000-0003-0436-8702] |
op_rights |
© Springer-Verlag Berlin Heidelberg 2013 |
op_doi |
https://doi.org/10.1007/s00382-013-1899-1 |
container_title |
Climate Dynamics |
container_volume |
43 |
container_issue |
5-6 |
container_start_page |
1197 |
op_container_end_page |
1219 |
_version_ |
1785544685652017152 |