A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly

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

Research output: Contribution to journalArticleResearchpeer-review

Abstract

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.

LanguageEnglish
Pages1197-1219
Number of pages23
JournalClimate Dynamics
Volume43
Issue number5-6
DOIs
Publication statusPublished - 2014

Fingerprint

sea level pressure
Medieval
Hadley cell
anomaly
climate
Little Ice Age
La Nina
wind field
El Nino
Southern Hemisphere
symmetry
global climate
climate modeling
temperature
Antarctica

Cite this

Goodwin, I. D., Browning, S., Lorrey, A. M., Mayewski, P. A., Phipps, S. J., Bertler, N. A. N., ... Stager, J. C. (2014). A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly. Climate Dynamics, 43(5-6), 1197-1219. https://doi.org/10.1007/s00382-013-1899-1
Goodwin, Ian D. ; Browning, Stuart ; Lorrey, Andrew M. ; Mayewski, Paul A. ; Phipps, Steven J. ; Bertler, Nancy A N ; Edwards, Ross P. ; Cohen, Tim J. ; van Ommen, Tas ; Curran, Mark ; Barr, Cameron ; Stager, J. Curt. / A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly. In: Climate Dynamics. 2014 ; Vol. 43, No. 5-6. pp. 1197-1219.
@article{9c3276fc963642818a49496fdf3ca827,
title = "A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly",
abstract = "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 Ni{\~n}a-like pattern interacting with a +ve SAM to 1300 CE. A relatively abrupt shift to -ve SAM and the central Pacific El Ni{\~n}o-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.",
author = "Goodwin, {Ian D.} and Stuart Browning and Lorrey, {Andrew M.} and Mayewski, {Paul A.} and Phipps, {Steven J.} and Bertler, {Nancy A N} and Edwards, {Ross P.} and Cohen, {Tim J.} and {van Ommen}, Tas and Mark Curran and Cameron Barr and Stager, {J. Curt}",
year = "2014",
doi = "10.1007/s00382-013-1899-1",
language = "English",
volume = "43",
pages = "1197--1219",
journal = "Climate Dynamics",
issn = "0930-7575",
publisher = "Springer, Springer Nature",
number = "5-6",

}

Goodwin, ID, Browning, S, Lorrey, AM, Mayewski, PA, Phipps, SJ, Bertler, NAN, Edwards, RP, Cohen, TJ, van Ommen, T, Curran, M, Barr, C & Stager, JC 2014, 'A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly', Climate Dynamics, vol. 43, no. 5-6, pp. 1197-1219. https://doi.org/10.1007/s00382-013-1899-1

A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly. / Goodwin, Ian D.; Browning, Stuart; Lorrey, Andrew M.; Mayewski, Paul A.; Phipps, Steven J.; Bertler, Nancy A N; Edwards, Ross P.; Cohen, Tim J.; van Ommen, Tas; Curran, Mark; Barr, Cameron; Stager, J. Curt.

In: Climate Dynamics, Vol. 43, No. 5-6, 2014, p. 1197-1219.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - A reconstruction of extratropical Indo-Pacific sea-level pressure patterns during the Medieval Climate Anomaly

AU - Goodwin, Ian D.

AU - Browning, Stuart

AU - Lorrey, Andrew M.

AU - Mayewski, Paul A.

AU - Phipps, Steven J.

AU - Bertler, Nancy A N

AU - Edwards, Ross P.

AU - Cohen, Tim J.

AU - van Ommen, Tas

AU - Curran, Mark

AU - Barr, Cameron

AU - Stager, J. Curt

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84906941137&partnerID=8YFLogxK

U2 - 10.1007/s00382-013-1899-1

DO - 10.1007/s00382-013-1899-1

M3 - Article

VL - 43

SP - 1197

EP - 1219

JO - Climate Dynamics

T2 - Climate Dynamics

JF - Climate Dynamics

SN - 0930-7575

IS - 5-6

ER -