Glacio-isostatic crustal movements caused by historical volume change of the Vatnajokull ice cap, Iceland

Details Glacio-isostatic crustal movements caused by historical volume change of the Vatnajokull ice cap, Iceland Glacio-isostatic crustal movements caused by historical volume change of the Vatnajokull ice cap, Iceland

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.2123s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 21, p. 2123-2126.

Physics

35

Earth Crust, Geodynamics, Glaciology, Isostasy, Iceland, Paleoclimatology, Subsidence

Scientific paper

Measurements of the lake level of Lake Langisjor at the SW edge of the Vatnajokull ice cap indicate a tilt of 0.26 +/- 0.06 microrad/yr away from the ice cap in the years of 1959-1991. The tilt is too large to be explained as an elastic Earth response to ice retreat this century, or to be caused by change in the gravitational pull of the ice cap, but it can be explained by sub-lithospheric viscous adjustment. Regional subsidence in historical times in SE Iceland can similarly be attributed to viscous adjustment resulting from the increased load of Vatnajokull during the Little Ice Age. The inferred sublithospheric viscosity is 1 x 10 exp 18 - 5 x 10 exp 19 Pa s.

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