uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Iceland rising: Solid Earth response to ice retreat inferred from satellite radar interferometry and visocelastic modeling
Show others and affiliations
2013 (English)In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 118, no 4, 1331-1344 p.Article in journal (Refereed) Published
Abstract [en]

A broad uplift occurs in Iceland in response to the retreat of ice caps, which began circa 1890. Until now, this deformation signal has been measured primarily using GPS at points some distance away from the ice caps. Here, for the first time we use satellite radar interferometry (interferometric synthetic aperture radar) to constrain uplift of the ground all the way up to the edge of the largest ice cap, Vatnajokull. This allows for improved constraints on the Earth rheology, both the thickness of the uppermost Earth layer that responds only in an elastic manner and the viscosity below it. The interferometric synthetic aperture radar velocities indicate a maximum displacement rate of 24 +/- 4 and 31 +/- 4 mm/yr at the edge of Vatnajokull, during 1995-2002 and 2004-2009, respectively. The fastest rates occur at outlet glaciers of low elevation where ice retreat is high. We compare the observations with glacial isostatic adjustment models that include the deglaciation history of the Icelandic ice caps since 1890 and two Earth layers. Using a Bayesian approach, we derived probability density functions for the average Earth model parameters for three satellite tracks. Based on our assumptions, the three best fit models give elastic thicknesses in the range of 15-40 km, and viscosities ranging from 4-10x1018 Pa s.

Place, publisher, year, edition, pages
2013. Vol. 118, no 4, 1331-1344 p.
Keyword [en]
InSAR, Finite element modeling, Rheology, GIA
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-203685DOI: 10.1002/jgrb.50082ISI: 000319926600001OAI: oai:DiVA.org:uu-203685DiVA: diva2:637416
Available from: 2013-07-18 Created: 2013-07-17 Last updated: 2013-10-01Bibliographically approved

Open Access in DiVA

fulltext(4449 kB)124 downloads
File information
File name FULLTEXT01.pdfFile size 4449 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Schmidt, PeterLund, Björn
By organisation
In the same journal
Journal of Geophysical Research
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 124 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 247 hits
ReferencesLink to record
Permanent link

Direct link