Space geodesy constrains ice age terminal deglaciation: The global ICE‐6G_C (VM5a) model

Journal of Geophysical Research: Solid Earth - Tập 120 Số 1 - Trang 450-487 - 2015
W. R. Peltier1, Donald F. Argus2, R. Drummond1
1Department of Physics, University of Toronto, Toronto, Ontario, Canada
2California Institute of Technology, Pasadena, California USA

Tóm tắt

AbstractA new model of the last deglaciation event of the Late Quaternary ice age is here described and denoted as ICE‐6G_C (VM5a). It differs from previously published models in this sequence in that it has been explicitly refined by applying all of the available Global Positioning System (GPS) measurements of vertical motion of the crust that may be brought to bear to constrain the thickness of local ice cover as well as the timing of its removal. Additional space geodetic constraints have also been applied to specify the reference frame within which the GPS data are described. The focus of the paper is upon the three main regions of Last Glacial Maximum ice cover, namely, North America, Northwestern Europe/Eurasia, and Antarctica, although Greenland and the British Isles will also be included, if peripherally, in the discussion. In each of the three major regions, the model predictions of the time rate of change of the gravitational field are also compared to that being measured by the Gravity Recovery and Climate Experiment satellites as an independent means of verifying the improvement of the model achieved by applying the GPS constraints. Several aspects of the global characteristics of this new model are also discussed, including the nature of relative sea level history predictions at far‐field locations, in particular the Caribbean island of Barbados, from which especially high‐quality records of postglacial sea level change are available but which records were not employed in the development of the model. Although ICE‐6G_C (VM5a) is a significant improvement insofar as the most recently available GPS observations are concerned, comparison of model predictions with such far‐field relative sea level histories enables us to identify a series of additional improvements that should follow from a further stage of model iteration.

Từ khóa


Tài liệu tham khảo

10.1007/s00190-011-0444-4

10.1111/j.1365-246X.2007.03344.x

10.1029/2012JB009196

10.1111/j.1365-246X.2010.04562.X

10.1029/1999JB000237

10.1111/j.1365-246X.2009.04463.X

10.1093/gji/ggu140

10.1038/ngeo1859

10.1038/345405a0

10.1130/0016-7606(1979)90<577:UDOTPR>2.0.CO;2

10.1175/1520-0469(1978)035<2362:LTVODI>2.0.CO;2

10.1029/2005GL025546

10.1029/2005JB003629

10.1007/978-3-540-49350-1_118

10.1130/G19643.1

10.1029/RG008i001p00169

10.1029/2010JB007530

10.1016/0033-5894(78)90033-9

10.1111/j.1365-246X.1976.tb04163.x

Desai S. D. W.Bertiger B.Haines H.Harvey C.Sella A.Sibthorpe andJ. P.Weiss(2011) Results from the Reanalysis of global GPS data in the IGS08 reference frame Abstract G53B‐0904 presented at the 2011 Fall Meeting AGU San Francisco Calif. 12–17 Dec.

10.1017/S0954102098000339

10.1191/095968301673881499

10.1038/nature03908

10.1016/j.geomorph.2004.06.013

Domack E. W., 2002, Proceedings of the Ocean Drilling Programme, 1

10.1016/0033-5894(89)90009-4

10.1130/0016-7606(1999)111<1517LPHROT>2.3.CO;2

10.1016/S0277-3791(01)00095-6

10.1130/G30360A.1

10.1038/342637a0

10.1016/0016-7037(79)90090-5

10.1029/RG010i003p00761

10.1111/j.1365-246X.1976.tb01252.x

10.1038/381503a0

10.1093/gji/ggs030

Gyllencreutz R., 2007, DATED‐A GIS‐based reconstruction and dating database of the Eurasian deglaciation, Geol. Surv. Finl., Spec. Pap., 46, 113

10.1002/jgrb.50208

10.1038/35069044

10.1046/j.1365-246x.1998.00541.x

10.1046/j.1365-246X.1998.00643.x

10.1080/03009480600781875

10.1038/338237a0

10.1130/GSAT01612A.1

10.1016/j.jog.2009.11.010

10.1126/science.1171041

10.1038/ngeo1061

Mackintosh A. N., 2013, Retreat history of the East Antarctic ice sheet since the Last Glacial Maximum, Quat. Sci. Rev., 33, 1

10.1016/j.palaeo.2007.08.015

10.1175/JCLI-D-12-00572.1

10.1126/science.1057022

10.1029/2003JB002619

10.1038/nature08954

10.1029/RG012i004p00649

10.1111/j.1365-246X.1976.tb01253.x

10.1016/S0065-2687(08)60519-1

10.1038/304434a0

10.1029/JB090iB11p09411

10.1126/science.265.5169.195

10.1126/science.273.5280.1359

10.1029/98RG02638

10.1002/jqs.713

Peltier W. R., 2002, The Encyclopedia of Global Environmental Change, 31

10.1146/annurev.earth.32.082503.144359

10.1016/j.quascirev.2004.06.023

Peltier W. R., 2007, Coastline Changes: Interrelation of Climate and Geological Processes, 5

Peltier W. R., 2007, Volume 9 of the First Edition of the Treatise on Geophysics, 243, 10.1016/B978-044452748-6.00148-6

10.1016/j.quascirev.2009.04.004

Peltier W. R., 2010, IPCC, 2010: Workshop Report of the Intergovernmental Panel on Climate Change Workshop on Sea Level Rise and Ice Sheet Instabilities, 157

10.1029/2008GL034586

10.1016/j.quascirev.2006.04.010

10.1029/2009JB006352

10.1016/j.quascirev.2003.07.003

10.1002/2014GL061413

10.1016/0040-1951(78)90129-4

10.1046/j.1365-246x.2002.01586.x

10.1029/2005GL025251

10.1029/2011JB008967

10.1038/20859

Petit R. E. M. andB.Luzum(2010) IERS conventions 2010. Verlag des Bundesamts fur Kartographie und Geodesie Frankfurt am Main.

10.1029/2011GL048624

10.1086/115850

10.1016/0033-5894(88)90030-0

10.1017/S0033822200034202

10.1175/BAMS-85-3-381

10.1029/2007GC001816

10.1016/S0277-3791(00)00075-5

10.1029/2011GL047282

10.1017/S0263593300020782

10.1017/S0954102008000941

10.1175/JCLI3689.1

10.1029/97JD01766

10.1046/j.1365-246X.2002.01702.x

10.1038/nature03617

10.1016/j.quascirev.2005.12.006

10.1016/j.epsl.2011.09.010

10.1029/2009JB006344

10.1029/2008JB006161

10.1175/1520-0442(1999)012<0873:TROTCA>2.0.CO;2

10.1175/1520-0442(2003)016<0889:PEGIPI>2.0.CO;2

10.1002/2013GL058486

10.1016/S0277-3791(01)00101-9

10.1029/2000JB900113

10.1016/j.quascirev.2012.01.016

10.1016/j.quascirev.2011.11.016

10.1111/j.1365-246X.2012.05557.x

10.1111/j.1365-246X.1984.tb01920.x

10.1029/96JB03860

Thông tin
Thông tin xuất bản

Journal of Geophysical Research: Solid Earth

Tập 120 Số 1

450-487

Thông tin tác giả