气候变化领域集成服务门户(CCPortal): Forty-six years of Greenland Ice Sheet mass balance from 1972 to 2018

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DOI	10.1073/pnas.1904242116
	Forty-six years of Greenland Ice Sheet mass balance from 1972 to 2018
	Mouginot J.; Rignot E.; Bjørk A.A.; van den Broeke M.; Millan R.; Morlighem M.; Noël B.; Scheuchl B.; Wood M.
发表日期	2019
ISSN	0027-8424
起始页码	9239
结束页码	9244
卷号	116 期号:19
英文摘要	We reconstruct the mass balance of the Greenland Ice Sheet using a comprehensive survey of thickness, surface elevation, velocity, and surface mass balance (SMB) of 260 glaciers from 1972 to 2018. We calculate mass discharge, D, into the ocean directly for 107 glaciers (85% of D) and indirectly for 110 glaciers (15%) using velocity-scaled reference fluxes. The decadal mass balance switched from a mass gain of +47 ± 21 Gt/y in 1972–1980 to a loss of 51 ± 17 Gt/y in 1980–1990. The mass loss increased from 41 ± 17 Gt/y in 1990–2000, to 187 ± 17 Gt/y in 2000–2010, to 286 ± 20 Gt/y in 2010–2018, or sixfold since the 1980s, or 80 ± 6 Gt/y per decade, on average. The acceleration in mass loss switched from positive in 2000–2010 to negative in 2010–2018 due to a series of cold summers, which illustrates the difficulty of extrapolating short records into longer-term trends. Cumulated since 1972, the largest contributions to global sea level rise are from northwest (4.4 ± 0.2 mm), southeast (3.0 ± 0.3 mm), and central west (2.0 ± 0.2 mm) Greenland, with a total 13.7 ± 1.1 mm for the ice sheet. The mass loss is controlled at 66 ± 8% by glacier dynamics (9.1 mm) and 34 ± 8% by SMB (4.6 mm). Even in years of high SMB, enhanced glacier discharge has remained sufficiently high above equilibrium to maintain an annual mass loss every year since 1998. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Climate change; Glaciers; Glaciology; Greenland; Sea level
语种	英语
scopus关键词	acceleration; body weight; climate change; cold stress; glacier; Greenland; ice sheet; review; sea level rise; summer; thickness
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/158867
作者单位	Mouginot, J., Department of Earth System Science, University of California, Irvine, CA 92617, United States, Institut des Géosciences de l’Environnement, Université Grenoble Alpes, CNRS, Grenoble, 38000, France; Rignot, E., Department of Earth System Science, University of California, Irvine, CA 92617, United States, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Bjørk, A.A., Department of Earth System Science, University of California, Irvine, CA 92617, United States, Centre for GeoGenetics, University of Copenhagen, Copenhagen, 1350, Denmark; van den Broeke, M., Institute for Marine and Atmospheric Research Utrecht, Utrecht University, TA Utrecht, 3508, Netherlands; Millan, R., Department of Earth System Science, University of California, Irvine, CA 92617, United States; Morlighem, M., Department of Earth System Science, University of California, Irvine, CA 92617, United States; Noël, B., Institute for Marine and Atmospheric Research Utrecht, Utre...
推荐引用方式 GB/T 7714	Mouginot J.,Rignot E.,Bjørk A.A.,et al. Forty-six years of Greenland Ice Sheet mass balance from 1972 to 2018[J],2019,116(19).
APA	Mouginot J..,Rignot E..,Bjørk A.A..,van den Broeke M..,Millan R..,...&Wood M..(2019).Forty-six years of Greenland Ice Sheet mass balance from 1972 to 2018.Proceedings of the National Academy of Sciences of the United States of America,116(19).
MLA	Mouginot J.,et al."Forty-six years of Greenland Ice Sheet mass balance from 1972 to 2018".Proceedings of the National Academy of Sciences of the United States of America 116.19(2019).