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- Title
The BErgen Snow SImulator (BESSI).
- Authors
Born, Andreas; Imhof, Michael A.; Stocker, Thomas F.
- Abstract
A comprehensive understanding of the state and dynamics of the land cryosphere and associated sea level rise is not possible without taking into consideration the intrinsic time scales of the continental ice sheets. At the same time, the ice sheet mass balance is the result of meteorological conditions that vary on seasonal and shorter time periods. Simulations of the coupled climate ice sheet system thus face the dilemma of skillfully resolving short-lived phenomena, while also being computationally fast enough to run over tens of thousands of years.As a possible solution, we present the BErgen Snow SImulator (BESSI), a surface energy and mass balance model that achieves computational efficiency while simulating all surface and internal fluxes of heat and mass explicitly and based on physical first principles. In its current configuration it covers most land areas of the Northern Hemisphere with an equidistant resolution of 40 km and 15 vertical layers. The model is calibrated using observational data and a large ensemble of simulations. The regional extent of seasonal and perennial snow, the densification of the snow pack, and the regional distribution of perennial liquid water is captured realistically.
- Subjects
SNOW; ICE sheets; HEAT flux; LAND cover; SURFACE energy; MELTWATER; MASS budget (Geophysics)
- Publication
Geophysical Research Abstracts, 2019, Vol 21, p1
- ISSN
1029-7006
- Publication type
Article