气候变化领域集成服务门户(CCPortal): Greenland basal water distribution from airborne radar sounding (2003-2014)

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.893097
	Greenland basal water distribution from airborne radar sounding (2003-2014)
	Jordan; Thomas M; Williams; Christopher N; Schroeder; Dustin M; Martos; Yasmina M; Cooper; Michael A; Siegert; Martin J; Paden; John D; Huybrechts; Philippe; Bamber; Jonathan L
发布日期	2018-08-16
数据集类型	dataset
英文简介	There is widespread, but often indirect, evidence that a significant fraction of the bed beneath the Greenland Ice Sheet is thawed (at or above the pressure melting point for ice). This includes the beds of major outlet glaciers and their tributaries and a large area around the NorthGRIP borehole in the ice-sheet interior. The ice-sheet scale distribution of basal water is, however, poorly constrained by existing observations. In principle, airborne radio-echo sounding (RES) enables the detection of basal water from bed-echo reflectivity, but unambiguous mapping is limited by uncertainty in signal attenuation within the ice. Here we introduce a new, RES diagnostic for basal water that is associated with wet-dry transitions in bed material: bed-echo reflectivity variability. This technique acts as a form of edge detector and is a sufficient, but not necessary, criteria for basal water. However, the technique has the advantage of being attenuation-insensitive and suited to data combination enabling combined analysis of over a decade of Operation IceBridge survey data.
空间范围	Median Latitude: 72.000000 * Median Longitude: -40.000000 * South-bound Latitude: 60.000000 * West-bound Longitude: -65.000000 * North-bound Latitude: 84.000000 * East-bound Longitude: -15.000000
时间范围	2003-01-01T00:00:00 - 2014-12-31T00:00:00
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/216116
推荐引用方式 GB/T 7714	Jordan,Thomas M,Williams,et al. Greenland basal water distribution from airborne radar sounding (2003-2014).2018-08-16.https://doi.org/10.1594/PANGAEA.893097.