Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations

Details Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3822302t&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 22, CiteID L22302

Physics

2

Cryosphere: Ice Sheets, Geodesy And Gravity: Non-Tectonic Deformation, Geodesy And Gravity: Rheology Of The Lithosphere And Mantle (7218, 8160), Geodesy And Gravity: Space Geodetic Surveys (4337), Atmospheric Processes: Paleoclimatology (0473, 4900)

Scientific paper

Bedrock uplift in Antarctica is dominated by a combination of glacial isostatic adjustment (GIA) and elastic response to contemporary mass change. Here, we present spatially extensive GPS observations of Antarctic bedrock uplift, using 52% more stations than previous studies, giving enhanced coverage, and with improved precision. We observe rapid elastic uplift in the northern Antarctic Peninsula. After considering elastic rebound, the GPS data suggests that modeled or empirical GIA uplift signals are often over-estimated, particularly the magnitudes of the signal maxima. Our observation that GIA uplift is misrepresented by modeling (weighted root-mean-squares of observation-model differences: 4.9-5.0 mm/yr) suggests that, apart from a few regions where large ice mass loss is occurring, the spatial pattern of secular ice mass change derived from Gravity Recovery and Climate Experiment (GRACE) data and GIA models may be unreliable, and that several recent secular Antarctic ice mass loss estimates are systematically biased, mainly too high.

Affiliated with

Also associated with

No associations

Rating

Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-739468