气候变化领域集成服务门户(CCPortal): Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.867908
	Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar
	Bohleber; Pascal; Sold; Leo; Hardy; Douglas R; Schwikowski; Margit; Klenk; Patrick; Fischer; Andrea; Sirguey; Pascal; Cullen; Nicolas J; Potocki; Mariusz; Hoffmann; Helene; Mayewski; Paul
发布日期	2016-11-09
数据集类型	dataset
英文简介	Although its Holocene glacier history is still subject to debate, the ongoing iconic decline of Kilimanjaro's largest remaining ice body, the Northern Ice Field (NIF), has been documented extensively based on surface and photogrammetric measurements. The study presented here adds, for the first time, ground-penetrating radar (GPR) data at center frequencies of 100 and 200 MHz to investigate bedrock topography, ice thickness and internal stratigraphy at NIF. The direct comparison of the GPR signal to the visible glacier stratigraphy at NIF's vertical walls is used to validate ice thickness and reveals that the major internal reflections seen by GPR can be associated with dust layers. Englacial reflections can be traced consistently within our 200 MHz profiles, indicating an undisturbed internal stratigraphy within NIF's central flat area. We show that it is possible to follow isochrone layers between two former NIF ice core drilling sites and a sampling site on NIF's vertical wall. As a result, these isochrone layers provide constraints for future attempts at linking age-depth information obtained from multiple locations at NIF. The GPR profiles reveal an ice thickness ranging between (6.1 ± 0.5) and (53.5 ± 1.0) m. Combining these data with a very high resolution digital elevation model we spatially extrapolate ice thickness and give an estimate of the total ice volume remaining at NIF's southern portion as (12.0 ± 0.3) 106 m3.
空间范围	Median Latitude: -3.058324 * Median Longitude: 37.348131 * South-bound Latitude: -3.059926 * West-bound Longitude: 37.344638 * North-bound Latitude: -3.055993 * East-bound Longitude: 37.353663
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/215376
推荐引用方式 GB/T 7714	Bohleber,Pascal,Sold,et al. Ice thickness of Kilimanjaro's Northern Ice Field mapped by ground-penetrating radar.2016-11-09.https://doi.org/10.1594/PANGAEA.867908.