[PDF] Top 20 An ice sheet model validation framework for the Greenland ice sheet

... of model velocities and basal boundary conditions are then used for additional spin-up of the temperature field, again maintaining a fixed ice sheet ...case, model temperatures were spun-up ... See full document

... of ice streams is a considerable uncertainty in projections of Greenland and Antarctic response to climate change (Vaughan and Arthern, 2007), and thus is a considerable uncer- tainty in projecting ... See full document

... case studies of drifting snow events are discussed in more detail. The first event is mainly caused by katabatic winds, and the second event by the passage of a low-pressure sys- tem. Although the timing of these events ... See full document

... the Greenland and Antarctic Ice sheets. Accurate simulation of ice stream evolution requires an understanding of a number of “ in- gredients ” that control the location and behaviour of ice ... See full document

... the model is much more unstable when we use the Tsai et ...The model mismatch with respect to observed ice thickness shows some system- atic biases ...Antarctic ice sheet is too thick ... See full document

... simulated ice sheet volume and extent in this study are within the range of known reconstructions with similar ice sheet models, a note on the excess of ice along the (predominantly ... See full document

... We examine how D varies in response to meltwater runoff and changes in glacier front position. Daily meltwater runoff estimates are also obtained from the RACMO2.3p2 product. Daily runoff values at each model grid ... See full document

... be validation of available comprehensive snow models against observations; including the process of piping in these models; and using them in models such as RACMO2 and MAR to study the impact of refreezing on the ... See full document

... Fundamentally, ice-sheet models rely on the application of sliding laws to approximate the rate of basal motion with regards to subglacial ...of ice dynamics, are controlled by frictional stresses ... See full document

... “Multi-millennial ice volume changes of the Greenland Ice Sheet” funded by the Geocenter ...of Greenland and Denmark, for providing bathymetry ...of Greenland and Denmark. We ... See full document

... the ice sheet is losing mass through increased surface melt and as- sociated meltwater ...the ice sheet (Enderlin et ...the ice sheet (Mikkelsen et ...the ice sheet ... See full document

... of ice sheet meltwater runoff extend- ing over multiple years (Van den Broeke et ...and ice sheet runoff losses through river discharge are scarce for Greenland (Ahlstrøm et ...the ... See full document

... and ice. Their values are determined by tuning during the model spin-up ...snowpack model, formation of superimposed ice occurs when water- saturated snow survives above the impermeable ... See full document

... SGVE model: a more pronounced uplift is present in the north; the central subsidence is over a more extended area; and the uplift in the margin is ...in ice thickness as reported by W10 and Thomas et ...the ... See full document

... to Ice Sheet Evolution) project (Fox Maule et ...served ice thickness and bedrock elevation taken from Bam- ber et ...the model imposing a fixed ...of ice temperature on the ... See full document

... bigger ice sheet when the surface elevation change feedback on temperature and precipitation is not taken into ...only model that retreats and has a cold and dry bias. For this model, the dry ... See full document

... the Greenland ice sheet (GrIS) has been losing mass at an increasing rate, enhanc- ing its contribution to sea-level rise ...in ice loss appear to be due to changes in both the surface mass ... See full document

... northern Greenland during the Eemian due to larger insolation changes is not ...the ice sheet model grid in a physically consistent way (Robinson et ...climate model, similar to our ... See full document

... the ice sliding following this approach. This model limitation falls within the bounds of current ice sheet modeling efforts, whereby a lack of physically based basal sliding parameter- ... See full document

... firnification model optimized for present-day central Greenland firn to past periods with different, warmer conditions, outside the range of model ...Goujon model for a given ...at ... See full document