Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change

被引：110

作者：

Bevis, Michael ^{[1
]}

Wahr, John ^{[2
]}

Khan, Shfaqat A. ^{[3
]}

Madsen, Finn Bo ^{[3
]}

Brown, Abel ^{[1
]}

Willis, Michael ^{[4
]}

Kendrick, Eric ^{[1
]}

Knudsen, Per ^{[3
]}

Box, Jason E. ^{[5
]}

van Dam, Tonie ^{[6
]}

Caccamise, Dana J., II ^{[1
]}

Johns, Bjorn ^{[7
]}

Nylen, Thomas ^{[7
]}

Abbott, Robin ^{[8
]}

White, Seth ^{[7
]}

Miner, Jeremy ^{[7
]}

Forsberg, Rene ^{[3
]}

Zhou, Hao ^{[1
]}

Wang, Jian ^{[1
]}

Wilson, Terry ^{[1
]}

Bromwich, David ^{[5
]}

Francis, Olivier ^{[6
]}

机构：

[1] Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[3] Natl Space Inst, DTU Space, Lyngby, Denmark

[4] Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14853 USA

[5] Ohio State Univ, Dept Geog, Columbus, OH 43210 USA

[6] Univ Luxembourg, Fac Sci, Luxembourg, Luxembourg

[7] UNAVCO Inc, Boulder, CO 80301 USA

[8] Polar Field Serv, Boulder, CO 80127 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2012年 / 109卷 / 30期

基金：

美国国家科学基金会;

关键词：

climate change; climate cycles; elasticity; crustal motion geodesy; ELASTIC RESPONSE; SEA-LEVEL; VARIABILITY; GRAVITY; BALANCE; GRACE;

D O I：

10.1073/pnas.1204664109

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：

070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];

摘要：

The Greenland GPS Network (GNET) uses the Global Positioning System (GPS) to measure the displacement of bedrock exposed near the margins of the Greenland ice sheet. The entire network is uplifting in response to past and present-day changes in ice mass. Crustal displacement is largely accounted for by an annual oscillation superimposed on a sustained trend. The oscillation is driven by earth's elastic response to seasonal variations in ice mass and air mass (i.e., atmospheric pressure). Observed vertical velocities are higher and often much higher than predicted rates of postglacial rebound (PGR), implying that uplift is usually dominated by the solid earth's instantaneous elastic response to contemporary losses in ice mass rather than PGR. Superimposed on longer-term trends, an anomalous 'pulse' of uplift accumulated at many GNET stations during an approximate six-month period in 2010. This anomalous uplift is spatially correlated with the 2010 melting day anomaly.

引用

页码：11944 / 11948

页数：5

共 22 条

[1]

Seasonal fluctuations in the mass of the Amazon River system and Earth's elastic response [J].