Southern Hemisphere high-resolution palaeoclimate records of the last 2000 years

被引:95
作者
Neukom, Raphael [1 ,2 ]
Gergis, Joelle [2 ]
机构
[1] Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland
[2] Univ Melbourne, Sch Earth Sci, Melbourne, Vic 3010, Australia
基金
瑞士国家科学基金会; 澳大利亚研究理事会;
关键词
last; 2000; years; multiproxy; palaeoclimatology; proxy calibration; Southern Hemisphere; SEA-SURFACE TEMPERATURE; WESTERN INDIAN-OCEAN; TREE-RING RECORDS; MULTIDECADAL CLIMATE VARIABILITY; EL-NINO/SOUTHERN-OSCILLATION; LEVEL PRESSURE VARIABILITY; PACIFIC CONVERGENCE ZONE; STABLE-ISOTOPE RECORDS; DEEP ICE CORE; NEW-ZEALAND;
D O I
10.1177/0959683611427335
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
This study presents a comprehensive assessment of high-resolution Southern Hemisphere (SH) paleoarchives covering the last 2000 years. We identified 174 monthly to annually resolved climate proxy (tree ring, coral, ice core, documentary, speleothem and sedimentary) records from the Hemisphere. We assess the interannual and decadal sensitivity of each proxy record to large-scale circulation indices from the Pacific, Indian and Southern Ocean regions over the twentieth century. We then analyse the potential of this newly expanded palaeoclimate network to collectively represent predictands (sea surface temperature, sea level pressure, surface air temperature and precipitation) commonly used in climate reconstructions. The key dynamical centres-of-action of the equatorial Indo-Pacific are well captured by the palaeoclimate network, indicating that there is considerable reconstruction potential in this region, particularly in the post AD 1600 period when a number of long coral records are available. Current spatiotemporal gaps in data coverage and regions where significant potential for future proxy collection exists are discussed. We then highlight the need for new and extended records from key dynamical regions of the Southern Hemisphere. Although large-scale climate field reconstructions for the SH are in their infancy, we report that excellent progress in the development of regional proxies now makes plausible estimates of continental- to hemispheric-scale climate variations possible.
引用
收藏
页码:501 / 524
页数:24
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