DOI: 10.5194/tc-8-1205-2014
Scopus记录号: 2-s2.0-84904319268
论文题名: The growth of sublimation crystals and surface hoar on the Antarctic plateau
作者: Gallet J ; -C ; , Domine F ; , Savarino J ; , Dumont M ; , Brun E
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 4 起始页码: 1205
结束页码: 1215
语种: 英语
英文关键词: climate effect
; crystal
; energy budget
; hoar frost
; sublimation
; surface area
; surface temperature
; water vapor
; Antarctic Plateau
; Antarctica
; East Antarctica
英文摘要: On the Antarctic plateau, precipitation quantities are so low that the surface mass budget is for an important part determined by exchanges of water vapor between the snow surface and the atmosphere surface. At Dome C (75° S, 123° E), we have frequently observed the growth of crystals on the snow surface under calm sunny weather. Here we present the time variations of specific surface area (SSA) and density of these crystals. Using the detailed snow model Crocus, we conclude that the formation of these crystals was very likely due to the nighttime formation of surface hoar crystals and to the daytime formation of sublimation crystals. These latter crystals form by processes similar to those involved in the formation of frost flowers on young sea ice. The formation of these crystals impacts the albedo, mass and energy budget of the Antarctic plateau. In particular, the SSA variations of the surface layer can induce an instantaneous forcing at the snow surface up to g-10 W m-2 at noon, resulting in a surface temperature drop of 0.45 K. This result confirms that snow SSA is a crucial variable to consider in the energy budget and climate of snow-covered surfaces. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74824
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Norwegian Polar Institute, Tromsø, Norway; CNRS, LGGE, 38041 Grenoble, France; Université Grenoble Alpes, LGGE, 38041 Grenoble, France; Takuvik Joint International Laboratory, Department of Chemistry, Université Laval and CNRS, QC, Canada; Météo-France-CNRS, CNRM-GAME UMR 3589, CEN, Saint-Martin d'Hères, France; Météo-France-CNRS, CNRM-GAME UMR 3589, Toulouse, France
Recommended Citation:
Gallet J,-C,, Domine F,et al. The growth of sublimation crystals and surface hoar on the Antarctic plateau[J]. Cryosphere,2014-01-01,8(4)