GABLS4 intercomparison of snow models at Dome C in Antarctica
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Published:2022-06-10
Issue:6
Volume:16
Page:2183-2202
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ISSN:1994-0424
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Container-title:The Cryosphere
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language:en
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Short-container-title:The Cryosphere
Author:
Le Moigne Patrick, Bazile EricORCID, Cheng Anning, Dutra Emanuel, Edwards John M.ORCID, Maurel William, Sandu Irina, Traullé OlivierORCID, Vignon EtienneORCID, Zadra Ayrton, Zheng Weizhong
Abstract
Abstract. The Antarctic plateau, characterized by cold and dry
weather conditions with very little precipitation, is mostly covered by snow
at the surface. This paper describes an intercomparison of snow models, of
varying complexity, used for numerical weather prediction or academic
research. The results of offline numerical simulations, carried out during
15 d in 2009, on a single site on the Antarctic plateau, show that the
simplest models are able to reproduce the surface temperature as well as the
most complex models provided that their surface parameters are well chosen.
Furthermore, it is shown that the diversity of the surface parameters of the
models strongly impacts the numerical simulations, in particular the
temporal variability of the surface temperature and the components of the
surface energy balance. The models tend to overestimate the surface
temperature by 2–5 K at night and underestimate it by 2 K during the day.
The observed and simulated turbulent latent heat fluxes are small, of the
order of a few W m−2, with a tendency to underestimate, while the
sensible heat fluxes are in general too intense at night as well as during
the day. The surface temperature errors are consistent with too large a
magnitude of sensible heat fluxes during the day and night. Finally, it is
shown that the most complex multilayer models are able to reproduce well
the propagation of the daily diurnal wave, and that the snow temperature
profiles in the snowpack are very close to the measurements carried out on
site.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Water Science and Technology
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