The Greenland Ice Sheet Response to Transient Climate Change
Diandong Ren, Rong Fu, Lance M Leslie, Jianli Chen, Clark R Wilson, David J Karoly
JOURNAL OF CLIMATE | AMER METEOROLOGICAL SOC | Published : 2011
This study applies a multiphase, multiple-rheology, scalable, and extensible geofluid model to the Greenland Ice Sheet (GrIS). The model is driven by monthly atmospheric forcing from global climate model simulations. Novel features of the model, referred to as the scalable and extensible geofluid modeling system (SEGMENT-Ice), include using the full Navier-Stokes equations to account for nonlocal dynamic balance and its influence on ice flow, and a granular sliding layer between the bottom ice layer and the lithosphere layer to provide a mechanism for possible large-scale surges in a warmer future climate (granular basal layer is for certain specific regions, though). Monthly climate of SEGM..View full abstract
Awarded by Div Atmospheric & Geospace Sciences
This work is supported by the Gary Comer Science Foundation, the Jackson School of Geosciences, the University of Texas at Austin, and the NASA OVWST subcontract from JPL. We thank Professors R. Alley for providing the GISP2 borehole data, R. Greve for offering the SICOPOLIS model code, and Van der Veen for providing the force balance model code. The first author also thanks Dr. Jezek for his insightful comments on the possible importance of the advection and inertial terms for the ice flow model. Molly McAllister and David Korn from the National Snow and Ice Data Center (NSIDC) helped with the 5-km DEM and ice thickness data. We acknowledge the international modelling groups for providing their data for analysis, the Program for Climate Model Diagnosis and Intercomparison (PCMDI) for collecting and archiving the model data. Transient climate simulations under SRES A1B were obtained from the PCMDI Coupled Model Intercomparison Project (CMIP). These simulations were run as part of a coordinated series of simulations by the modelling centres for the IPCC Fourth Assessment Report.