气候变化领域集成服务门户(CCPortal): TanDEM-X elevation model of Roi Baudoin ice shelf, link to GeoTIFF

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.868109
	TanDEM-X elevation model of Roi Baudoin ice shelf, link to GeoTIFF
	Lenaerts; Jan T M; Lhermitte; Stef; Drews; Reinhard; Ligtenberg; Stefan R M; Berger; Sophie; Helm; Veit; Smeets; Paul; van den Broeke; Michiel R; van de Berg; Willem Jan; van Meijgaard; Erik; Eijkelboom; Mark; Eisen; Olaf; Pattyn; Frank
发布日期	2016-11-11
数据集类型	dataset
英文简介	Surface melt and subsequent firn air depletion can ultimately lead to disintegration of Antarctic ice shelves causing grounded glaciers to accelerate and sea level to rise. In the Antarctic Peninsula (AP), foehn winds enhance melting near the grounding line, which in the recent past has led to the disintegration of the most northerly ice shelves. Here, we provide observational and model evidence that this process also occurs over an East Antarctic (EA) ice shelf, where meltwater-induced firn air depletion is found in the grounding zone. Unlike the AP, where foehn events originate from episodic interaction of the circumpolar westerlies with the topography, in coastal EA high temperatures are caused by persistent katabatic winds originating from the ice sheet's interior. Katabatic winds warm and mix the air as it flows downward and cause widespread snow erosion, explaining >3 K higher near-surface temperatures in summer and surface melt doubling in the grounding zone compared to its surroundings. Additionally, these winds expose blue ice and firn with lower surface albedo, further enhancing melt. The in-situ observation of supraglacial flow and englacial storage of meltwater suggests that ice shelf grounding zones in EA, like their AP counterparts, are vulnerable to hydrofracturing.
空间范围	Latitude: -71.200000 * Longitude: 29.800000
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/216725
推荐引用方式 GB/T 7714	Lenaerts,Jan T M,Lhermitte,et al. TanDEM-X elevation model of Roi Baudoin ice shelf, link to GeoTIFF.2016-11-11.https://doi.org/10.1594/PANGAEA.868109.