Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
A downscaling approach toward high-resolution surface mass balance over Antarctica
Gallee, H.; Agosta, C.; Gential, L.; Favier, V.; Krinner, G. (2011). A downscaling approach toward high-resolution surface mass balance over Antarctica. Surveys in Geophysics 32(4-5): 507-518. https://dx.doi.org/10.1007/s10712-011-9125-3
In: Surveys in Geophysics. Kluwer Academic Publishers: Dordrecht; Tokyo; Lancaster; Boston. ISSN 0169-3298; e-ISSN 1573-0956, meer
| |
Trefwoord |
|
Author keywords |
Net accumulation; Downscaling; Law Dome |
Auteurs | | Top |
- Gallee, H.
- Agosta, C., meer
- Gential, L.
|
|
|
Abstract |
The Antarctic ice sheet surface mass balance shows high spatial variability over the coastal area. As state-of-the-art climate models usually require coarse resolutions to keep computational costs to a moderate level, they miss some local features that can be captured by field measurements. The downscaling approach adopted here consists of using a cascade of atmospheric models from large scale to meso-? scale. A regional climate model (Modèle Atmosphérique Régional) forced by meteorological reanalyses provides a diagnostic physically-based rain- and snowfall downscaling model with meteorological fields at the regional scale. Although the parameterizations invoked by the downscaling model are fairly simple, the knowledge of small-scale topography significantly improves the representation of spatial variability of precipitation and therefore that of the surface mass balance. Model evaluation is carried out with the help of shallow firn cores and snow height measurements provided by automatic weather stations. Although downscaling of blowing snow still needs to be implemented in the model, the net accumulation gradient across Law Dome summit is shown to be induced mostly by orographic effects on precipitation. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.