Sr-Nd-Pb Isotope Evidence for Ice-Sheet Presence on Southern Greenland During the Last Interglacial

被引：114

作者：

Colville, Elizabeth J. ^{[1
]}

Carlson, Anders E. ^{[1
]}

Beard, Brian L. ^{[1
]}

Hatfield, Robert G. ^{[2
]}

Stoner, Joseph S. ^{[2
]}

Reyes, Alberto V. ^{[1
]}

Ullman, David J. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA

[2] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA

来源：

SCIENCE | 2011年 / 333卷 / 6042期

基金：

美国国家科学基金会;

关键词：

SEA-LEVEL RISE; GLACIAL MAXIMUM; CLIMATE; CYCLES; CONSTRAINTS; INSOLATION; SEDIMENTS; HOLOCENE; HISTORY; RETREAT;

D O I：

10.1126/science.1204673

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

To ascertain the response of the southern Greenland Ice Sheet (GIS) to a boreal summer climate warmer than at present, we explored whether southern Greenland was deglaciated during the Last Interglacial (LIG), using the Sr-Nd-Pb isotope ratios of silt-sized sediment discharged from southern Greenland. Our isotope data indicate that no single southern Greenland geologic terrane was completely deglaciated during the LIG, similar to the Holocene. Differences in sediment sources during the LIG relative to the early Holocene denote, however, greater southern GIS retreat during the LIG. These results allow the evaluation of a suite of GIS models and are consistent with a GIS contribution of 1.6 to 2.2 meters to the >= 4-meter LIG sea-level highstand, requiring a significant sea-level contribution from the Antarctic Ice Sheet.

引用

页码：620 / 623

页数：4

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