Antarctic Ice Sheet Elevation Impacts on Water Isotope Records During the Last Interglacial

被引：11

作者：

Goursaud, Sentia ^{[1
]}

Holloway, Max ^{[2
]}

Sime, Louise ^{[3
]}

Wolff, Eric ^{[1
]}

Valdes, Paul ^{[4
]}

Steig, Eric J. ^{[5
]}

Pauling, Andrew ^{[5
]}

机构：

[1] Univ Cambridge, Dept Earth Sci, Cambridge, England

[2] Scottish Assoc Marine Sci, Oban, Argyll, Scotland

[3] British Antarctic Survey, Ice Dynam & Paleoclimate, Cambridge, England

[4] Univ Bristol, Sch Geog Sci, Bristol, Avon, England

[5] Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2021年 / 48卷 / 06期

基金：

欧洲研究理事会; 英国自然环境研究理事会;

关键词：

climate modeling; effect of the elevation; Last Interglacial; water stable isotopes; SEA-LEVEL; PROBABILISTIC ASSESSMENT; ATMOSPHERIC CIRCULATION; SOUTHERN-HEMISPHERE; CLIMATE; COLLAPSE; VARIABILITY; HOLOCENE; HISTORY; RETREAT;

D O I：

10.1029/2020GL091412

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Changes of the topography of the Antarctic Ice Sheet (AIS) can complicate the interpretation of ice core water stable isotope measurements in terms of temperature. Here, we use a set of idealized AIS elevation change scenarios to investigate this for the warm Last Interglacial (LIG). We show that LIG delta O-18 against elevation relationships is not uniform across Antarctica and that the LIG response to elevation is lower than the preindustrial response. The effect of LIG elevation-induced sea ice changes on delta O-18 is small, allowing us to isolate the effect of elevation change alone. Our results help to define the effect of AIS changes on the LIG delta O-18 signals and should be invaluable to those seeking to use AIS ice core measurements for these purposes. Especially, our simulations strengthen the conclusion that ice core measurements from the Talos Dome core exclude the loss of the Wilkes Basin at around 128 kyr.

引用

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