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

Bevis, Michael ; Wahr, John ; Khan, Shfaqat A. ; Madsen, Finn Bo ; Brown, Abel ; Willis, Michael ; Kendrick, Eric ; Knudsen, Per ; Box, Jason E. ; van Dam, Tonie ; Caccamise, Dana J. ; Johns, Bjorn ; Nylen, Thomas ; Abbott, Robin ; White, Seth ; Miner, Jeremy ; Forsberg, Rene ; Zhou, Hao ; Wang, Jian ; Wilson, Terry ; Bromwich, David ; Francis, Olivier

Proceedings of the National Academy of Sciences - PNAS, 2012-07, Vol.109 (30), p.11944-11948 [Periódico revisado por pares]

United States: National Academy of Sciences

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Título:
Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change
Autor: Bevis, Michael ; Wahr, John ; Khan, Shfaqat A. ; Madsen, Finn Bo ; Brown, Abel ; Willis, Michael ; Kendrick, Eric ; Knudsen, Per ; Box, Jason E. ; van Dam, Tonie ; Caccamise, Dana J. ; Johns, Bjorn ; Nylen, Thomas ; Abbott, Robin ; White, Seth ; Miner, Jeremy ; Forsberg, Rene ; Zhou, Hao ; Wang, Jian ; Wilson, Terry ; Bromwich, David ; Francis, Olivier
Assuntos: Air masses ; Atmospheric pressure ; Average linear density ; Bedrock ; Climate ; Climate Change ; Deformation ; Elasticity ; Geographic Information Systems ; Geological Phenomena ; Glaciers ; Global positioning systems ; GPS ; Greenland ; Ice ; Ice Cover ; Ice sheets ; Mass ; Melting ; Physical Sciences ; Rocks ; Seasons ; Time series ; Time series models
É parte de: Proceedings of the National Academy of Sciences - PNAS, 2012-07, Vol.109 (30), p.11944-11948
Notas: Edited by David T. Sandwell, Scripps Institution of Oceanography, La Jolla, CA, and approved June 11, 2012 (received for review March 19, 2012)
Author contributions: M.B., F.B.M., P.K., T.v., D.J.C., and T.W. designed research; M.B., S.A.K., F.B.M., A.B., M.W., E.K., D.J.C., B.J., T.N., R.A., S.W., J.M., R.F., H.Z., J. Wang, and O.F. performed research; J.E.B. and D.B. contributed new analytic tools; M.B., J. Wahr, A.B., and E.K. analyzed data; and M.B., J. Wahr, and S.A.K. wrote the paper;.
Descrição: 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.
Editor: United States: National Academy of Sciences
Idioma: Inglês

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

United States: National Academy of Sciences

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