Rapid viscoelastic uplift in southeast Alaska caused by post-Little Ice Age glacial retreat
نویسندگان
چکیده
Our observations show that extreme uplift in southeast Alaska began about 1770 AD, with relative sea level (RSL) change to 5.7 m and current uplift rates to 32 mm/yr. This region experienced widespread glacial melting following the Little Ice Age (LIA), with the collapse of the Glacier Bay Icefield alone equivalent to 8 mm of global sea level rise. Geodynamic modelling links the uplift to post-LIA isostatic rebound, with the extreme uplift signal and a priori knowledge of ice load changes requiring the presence of a low viscosity asthenosphere (3.7 10 Pa s). These crustal deformations are triggered by climate change through glacier wastage. D 2005 Elsevier B.V. All rights reserved.
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Rapid uplift of southern Alaska caused by recent ice loss
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