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dc.contributor.authorRen, Diandongen_US
dc.contributor.authorFU, RONGen_US
dc.contributor.authorLeslie, Lance M.en_US
dc.contributor.authorKaroly, David J.en_US
dc.contributor.authorChen, Jianlien_US
dc.contributor.authorWilson, Clarken_US
dc.date.accessioned2014-05-22T06:57:39Z
dc.date.available2014-05-22T06:57:39Z
dc.date.issued2011en_US
dc.identifier.citationRen, D., Fu, R., Leslie, L. M., Karoly, D. J., Chen, J. L., & Wilson, C. (2011). A multirheology ice model: formulation and application to the Greenland ice sheet. Journal of Geophysical Research, 116, doi: 10.1029/2010JD014855.en_US
dc.identifier.issn0148-0227en_US
dc.identifier.urihttp://hdl.handle.net/11343/32750
dc.description© 2011 American Geophysical Unionen_US
dc.description.abstractAccurate prediction of future sea level rises requires models which can reproduce recent observed change in ice sheet behavior. This study describes a new multiphase, multiple‐rheology ice dynamics model (SEGMENT‐ice), which is used to examine Greenland ice sheet (GrIS) responses both to past and to possible future warming climate conditions. When applied to the GrIS, SEGMENT‐ice exhibits skill in reproducing the mass loss rate derived from the Gravity Recovery and Climate Experiment (GRACE), the interferometric synthetic aperture radar (InSAR) measured surface flow speed, and the microwave remotely sensed surface melt area over the past decade. When forced by the NCEP/NCAR reanalysis atmospheric parameters, the ice model simulates closely the GrIS mass loss rate obtained from GRACE. An increase of summer maximum melt area extent (SME) is indicative of an expansion of the ablation zone. The modeled SME from 1979 to 2006 also simulates well the observed interannual variability of SME, with a high correlation of 0.88 between the two time series. The geographical distributions of the modeled and observed SME also agree well. Comparison of modeled and observed velocity over three regions, covering the west, northeast, and north sides of the GrIS, respectively, indicates a satisfactory model performance in delineating flow direction and magnitudes for regions with flow speed less than 500 m/y, with no region‐specific systematic errors. However, the model cannot simulate extremes in the observations, mainly because it is limited by spatial resolution. The SEGMENT‐ice simulations are sufficiently close to the observations to employ the model to project the future behavior of the GrIS. By the end of this century, if the moderate A1B scenario is realized, the total mass loss rate will reach ∼220 km3/y. The ice divergence contribution will be about 60%, outweighing the contribution from surface processes.en_US
dc.languageengen_US
dc.publisherAmerican Geophysical Unionen_US
dc.subjectice sheet modelingen_US
dc.subjectclimate warmingen_US
dc.titleA multirheology ice model: formation and application to the Greenland ice sheeten_US
dc.typeJournal Articleen_US
melbourne.peerreviewPeer Revieweden_US
melbourne.affiliationThe University of Melbourneen_US
melbourne.affiliation.departmentScience - Earth Sciencesen_US
melbourne.publication.statusPublisheden_US
melbourne.source.titleJournal of Geophysical Researchen_US
melbourne.source.volume116en_US
melbourne.elementsidNA
melbourne.contributor.authorKaroly, David
melbourne.accessrightsOpen Access


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