Improved Constraints on Models of Glacial Isostatic Adjustment: A Review of the Contribution of Ground-Based Geodetic Observations

被引:99
作者
King, Matt A. [1 ]
Altamimi, Zuheir [2 ]
Boehm, Johannes [3 ]
Bos, Machiel [4 ]
Dach, Rolf [5 ]
Elosegui, Pedro [6 ]
Fund, Francois [7 ,8 ]
Hernandez-Pajares, Manuel [9 ]
Lavallee, David [10 ]
Cerveira, Paulo Jorge Mendes [11 ]
Penna, Nigel [1 ]
Riva, Riccardo E. M. [12 ]
Steigenberger, Peter [13 ]
van Dam, Tonie [14 ]
Vittuari, Luca [15 ]
Williams, Simon [16 ]
Willis, Pascal [17 ,18 ]
机构
[1] Univ Newcastle, Sch Civil Engn & Geosci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[2] LAREG, ENSG, Inst Geog Natl, F-77455 Champs Sur Marne, France
[3] Vienna Univ Technol, Inst Geodesy & Geophys E1281, A-1040 Vienna, Austria
[4] Univ Porto, Ctr Interdisciplinar Invest Marinha & Ambiental, CIMAR CIIMAR, P-4050123 Oporto, Portugal
[5] Univ Bern, Astron Inst, CH-3012 Bern, Switzerland
[6] CSIC IEEC, Inst Space Sci, Barcelona 08034, Spain
[7] ESGT CNAM, Lab Geomat & Geodesie L2G, F-72000 Le Mans, France
[8] Nantes Atlantique Univ, Univ Nantes, UFR Sci Tech, CNRS,Lab Planet & Geodynam,UMR 6112, F-44322 Nantes 3, France
[9] Univ Politecn Cataluna, Barcelona 08034, Spain
[10] Delft Univ Technol, Delft Inst Earth Observat & Space Syst, NL-2600 GB Delft, Netherlands
[11] BEWAG Geoserv GmbH, Eisenstadt, Austria
[12] Delft Univ Technol, Delft Inst Earth Observat & Space Syst, NL-2629 HS Delft, Netherlands
[13] Tech Univ Munich, Inst Astron & Phys Geodasie, D-80333 Munich, Germany
[14] Univ Luxembourg, Fac Sci Technol & Commun, L-1359 Luxembourg, Luxembourg
[15] Dipartimento Ingn Strut, Bologna, Italy
[16] Natl Oceanog Ctr, Liverpool L3 5DA, Merseyside, England
[17] Inst Geog Natl, Direct Tech, F-94165 St Mande, France
[18] Univ Paris 07, CNRS, IPGP, Inst Phys Globe,UFR STEP, F-75205 Paris, France
关键词
Glacial isostatic adjustment (GIA); Ice sheet mass balance; Geodesy; Antarctica; Greenland; GPS; VLBI; DORIS; SLR; PHASE CENTER VARIATIONS; POSTGLACIAL SEA-LEVEL; ICE MASS-LOSS; TIME-SERIES; SOLID EARTH; LOADING DISPLACEMENT; RADIATION PRESSURE; LATE PLEISTOCENE; CONTINUOUS GPS; SYOWA STATION;
D O I
10.1007/s10712-010-9100-4
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The provision of accurate models of Glacial Isostatic Adjustment (GIA) is presently a priority need in climate studies, largely due to the potential of the Gravity Recovery and Climate Experiment (GRACE) data to be used to determine accurate and continent-wide assessments of ice mass change and hydrology. However, modelled GIA is uncertain due to insufficient constraints on our knowledge of past glacial changes and to large simplifications in the underlying Earth models. Consequently, we show differences between models that exceed several mm/year in terms of surface displacement for the two major ice sheets: Greenland and Antarctica. Geodetic measurements of surface displacement offer the potential for new constraints to be made on GIA models, especially when they are used to improve structural features of the Earth's interior as to allow for a more realistic reconstruction of the glaciation history. We present the distribution of presently available campaign and continuous geodetic measurements in Greenland and Antarctica and summarise surface velocities published to date, showing substantial disagreement between techniques and GIA models alike. We review the current state-of-the-art in ground-based geodesy (GPS, VLBI, DORIS, SLR) in determining accurate and precise surface velocities. In particular, we focus on known areas of need in GPS observation level models and the terrestrial reference frame in order to advance geodetic observation precision/accuracy toward 0.1 mm/year and therefore further constrain models of GIA and subsequent present-day ice mass change estimates.
引用
收藏
页码:465 / 507
页数:43
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