Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Relative sea-level response to Little Ice Age ice mass change in south central Alaska : reconciling model predictions and geological evidence.

Barlow, N.L.M. and Shennan, I. and Long, A.J. (2012) 'Relative sea-level response to Little Ice Age ice mass change in south central Alaska : reconciling model predictions and geological evidence.', Earth and planetary science letters., 315-316 . pp. 62-75.

Abstract

Integration of geological data and glacio-isostatic adjustment (GIA) modelling shows that it is possible to decouple complex mechanisms of relative sea-level (RSL) change in a tectonically active glacial environment. We model a simplest solution in which RSL changes in upper Cook Inlet, Alaska, are a combination of the interplay of tectonic and isostatic processes driven by the unique rheology of this tectonically active location. We calculate interseismic uplift during latter part of the penultimate earthquake cycle to vary from 0.3 to 0.7 mm/yr. Diatom based reconstructions of RSL from tidal marsh sediment sequences coupled with detailed age models, from AD 1400 to the AD 1964 great earthquake, show deviations from a purely tectonically driven model of regional RSL. Glacial isostatic modelling, constrained by GPS data, predicts up to 70 cm sea-level change due to mountain glacier mass balance changes during the Little Ice Age. Misfits between the GIA model predictions and RSL reconstructions in the 19th and 20th century highlight that the tidal marshes of upper Cook Inlet potentially record a hemispheric-wide acceleration in sea level and that other more complex Earth process combinations may contribute to regional RSL change.

Item Type:Article
Additional Information:Sea Level and Ice Sheet Evolution: a PALSEA Special Edition.
Keywords:Earthquake deformation cycle, Glacial isostatic adjustment, Little Ice Age, Relative sea-level change, Diatoms, Dating.
Full text:(AM) Accepted Manuscript
Download PDF
(3055Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1016/j.epsl.2011.09.048
Record Created:15 Mar 2013 12:35
Last Modified:18 Mar 2013 20:18

Social bookmarking: del.icio.usConnoteaBibSonomyCiteULikeFacebookTwitterExport: EndNote, Zotero | BibTex
Look up in GoogleScholar | Find in a UK Library