气候变化领域集成服务门户(CCPortal): The growth of sublimation crystals and surface hoar on the Antarctic plateau

CCPortal

DOI	10.5194/tc-8-1205-2014
	The growth of sublimation crystals and surface hoar on the Antarctic plateau
	Gallet J.-C.; Domine F.; Savarino J.; Dumont M.; Brun E.
发表日期	2014
ISSN	19940416
卷号	8 期号:4
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).
学科领域	climate effect; crystal; energy budget; hoar frost; sublimation; surface area; surface temperature; water vapor; Antarctic Plateau; Antarctica; East Antarctica
语种	英语
scopus关键词	climate effect; crystal; energy budget; hoar frost; sublimation; surface area; surface temperature; water vapor; Antarctic Plateau; Antarctica; East Antarctica
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120089
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
推荐引用方式 GB/T 7714	Gallet J.-C.,Domine F.,Savarino J.,et al. The growth of sublimation crystals and surface hoar on the Antarctic plateau[J],2014,8(4).
APA	Gallet J.-C.,Domine F.,Savarino J.,Dumont M.,&Brun E..(2014).The growth of sublimation crystals and surface hoar on the Antarctic plateau.Cryosphere,8(4).
MLA	Gallet J.-C.,et al."The growth of sublimation crystals and surface hoar on the Antarctic plateau".Cryosphere 8.4(2014).