Dataset - Greenland Surface Mass Balance
A crucial boundary condition for the accurate modelling of past, present and future volume changes of the GrIS is the surface mass balance, comprising the sum of all mass fluxes towards (solid precipitation) and away (melt, sublimation, erosion) from the ice sheet surface. Because reliable GrIS surface mass balance fields are not available, we do not know the volume of the GrIS and its contribution to sea level changes during the previous interglacial (the Eemian, 125,000 years ago) or during the last glacial maximum (LGM, some 21,000 years ago), nor can we predict with any certainty how the GrIS will behave in a (future) enhanced greenhouse climate.
In this project, the surface mass balance of the GrIS will be modelled for these key periods in the past and future. By using a regional atmospheric climate model (RACMO2), driven at the boundaries by state-of-the-art atmospheric general circulation models, this can be done at unprecedented high resolution (18 km) to match the typical resolution of ice dynamical models. Another big advantage of using a meteorological model is the availability of spatially and temporally realistic melt fluxes to study the interaction with ice dynamics. With results from this research we will be able to hindcast and predict the changes in the volume of the GrIS with much improved accuracy and with that its contribution to past and future changes in global sea level.
Utrecht University, Institute for Marine and Atmospheric research Utrecht (IMAU)
|Michiel van den Broeke||Utrecht University, Institute for Marine and Atmospheric research Utrecht (IMAU)||Investigator, Technical Contact, Metadata Author|
The model RACMO2 has been tested and checked against current climate data and it is used to evaluate the current climate in Greenland resulting in several publications. Model data for the Eemian were tested in 1 publication (see the list of publications).
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|Regional modelling of Greenland surface mass balance for key episodes in the past and future||851.40.042||2006-08-01 - 2011-07-31|
Ettema, J., van den Broeke, M.R., et al., 2010. Climate of the Greenland ice sheet using a high-resolution climate model-Part 1: Evaluation. The Cryosphere 4 (4), 511
van den Broeke, M.R., Bamber, J.L., et al., 2009. Partitioning Recent Greenland Mass Loss. Science 326 (5955), 984-986
Ettema, J., van den Broeke, M.R., et al., 2009. Higher surface mass balance of the Greenland ice sheet revealed by high-resolution climate modeling. Geophysical Research Letters 36 (12)
Kaspar, F., Kühl, N., et al., 2005. A model-data comparison of European temperatures in the Eemian interglacial. Geophysical Research Letters 32 (11)
Regional modeling of Greenland surface mass balance for key episodes in the past and future (Eemian, pre-industrial)
- Continent > North America > Greenland
- Geographic Region > Arctic
- Geographic Region > Polar
- Geoscientific Information
- Inland Waters
- Cryosphere > Glaciers/ice Sheets > Ice Sheets > Regional Atmospheric Climate Model
- Cryosphere > Glaciers/ice Sheets > Ice Sheets > Surface Mass Balance Of Greenland Ice Sheet
- Chronostratigraphic Unit (stage): Eemian & pre-industrial