气候变化领域集成服务门户(CCPortal): Deglacial temperature history of West Antarctica

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DOI	10.1073/pnas.1609132113
	Deglacial temperature history of West Antarctica
	Cuffey K.M.; Clow G.D.; Steig E.J.; Buizert C.; Fudge T.J.; Koutnik M.; Waddington E.D.; Alley R.B.; Severinghaus J.P.
发表日期	2016
ISSN	0027-8424
起始页码	14249
结束页码	14254
卷号	113 期号:50
英文摘要	The most recent glacial to interglacial transition constitutes a remarkable natural experiment for learning how Earth's climate responds to various forcings, including a rise in atmospheric CO2. This transition has left a direct thermal remnant in the polar ice sheets, where the exceptional purity and continual accumulation of ice permit analyses not possible in other settings. For Antarctica, the deglacial warming has previously been constrained only by the water isotopic composition in ice cores, without an absolute thermometric assessment of the isotopes' sensitivity to temperature. To overcome this limitation, we measured temperatures in a deep borehole and analyzed them together with ice-core data to reconstruct the surface temperature history of West Antarctica. The deglacial warming was 11:31:8 C, approximately two to three times the global average, in agreement with theoretical expectations for Antarctic amplification of planetary temperature changes. Consistent with evidence from glacier retreat in Southern Hemisphere mountain ranges, the Antarctic warming was mostly completed by 15 kyBP, several millennia earlier than in the Northern Hemisphere. These results constrain the role of variable oceanic heat transport between hemispheres during deglaciation and quantitatively bound the direct influence of global climate forcings on Antarctic temperature. Although climate models perform well on average in this context, some recent syntheses of deglacial climate history have underestimated Antarctic warming and the models with lowest sensitivity can be discounted.
英文关键词	Antarctica; Climate; Glaciology; Paleoclimate; Temperature
语种	英语
scopus关键词	nitrogen 15; Antarctica; astronomy; climate change; Conference Paper; deglaciation; global climate; greenhouse effect; heat transfer; history; ice core record; isotope analysis; Northern Hemisphere; ocean environment; paleoclimate; priority journal; quantitative study; sea surface temperature; Southern Hemisphere; thermometry; warming; Western Hemisphere
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159071
作者单位	Cuffey, K.M., Department of Geography, University of California, Berkeley, CA 94720, United States; Clow, G.D., Geosciences and Environmental Change Science Center, United States Geological Survey, Lakewood, CO 80225, United States; Steig, E.J., Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States; Buizert, C., College of Earth Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States; Fudge, T.J., Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States; Koutnik, M., Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States; Waddington, E.D., Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States; Alley, R.B., Department of Geosciences, Pennsylvania State UniversityPA 16802, United States; Severinghaus, J.P., Scripps Institution of Oceanography, University of California, San Diego, CA 92093,...
推荐引用方式 GB/T 7714	Cuffey K.M.,Clow G.D.,Steig E.J.,et al. Deglacial temperature history of West Antarctica[J],2016,113(50).
APA	Cuffey K.M..,Clow G.D..,Steig E.J..,Buizert C..,Fudge T.J..,...&Severinghaus J.P..(2016).Deglacial temperature history of West Antarctica.Proceedings of the National Academy of Sciences of the United States of America,113(50).
MLA	Cuffey K.M.,et al."Deglacial temperature history of West Antarctica".Proceedings of the National Academy of Sciences of the United States of America 113.50(2016).