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An ice-core record of Antarctic sea-ice extent in the southern Indian Ocean for the past 300 years

Citation

Xiao, C and Dou, T and Sneed, SB and Li, R and Allison, I, An ice-core record of Antarctic sea-ice extent in the southern Indian Ocean for the past 300 years, Annals of Glaciology, 56, (69) pp. 451-455. ISSN 0260-3055 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 International Glaciological Society

DOI: doi:10.3189/2015AoG69A719

Abstract

The differing response of ice extent in the Arctic and Antarctic to global average temperature change, over approximately the last three decades, highlights the importance of reconstructing long-term sea-ice history. Here, using high-resolution ice-core records of methanesulfonate (MS–) from the East Antarctic ice sheet in Princess Elizabeth Land, we reconstruct southern Indian Ocean sea-ice extent (SIE) for the sector 62–92° E for the period AD 1708–2000. Annual MS– concentration positively correlates in this sector with satellite-derived SIE for the period 1979–2000 (r2 = 0.25, P < 0.02). The 293 year MS– record of proxy SIE shows multi-decadal variations, with large decreases occurring in two warm intervals during the Little Ice Age, and during the 1940s. It is very likely that the global temperature is the controlling factor of Antarctic sea-ice variation at the centennial scale, although there has been a change in phase between them in recent decades.

Item Details

Item Type:Refereed Article
Keywords:sea-ice, ice-core, palaeoclimate
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Climate and Climate Change not elsewhere classified
Author:Allison, I (Dr Ian Allison)
ID Code:103903
Year Published:2015
Web of Science® Times Cited:2
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2015-10-28
Last Modified:2017-10-30
Downloads:0

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