Glacier reconstruction of La Covacha Massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum

doi:10.1007/s11629-019-5382-2

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol16 No.6

	Glacier reconstruction of La Covacha Massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum
	Campos, Nestor; Palacios, David; Tanarro, Luis M.
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:6 页码:1336-1352
关键词	Glacier reconstruction Paleoglacier Ice thickness Equilibrium line altitude Iberian Central System
ISSN号	1672-6316
DOI	10.1007/s11629-019-5382-2
文献子类	Article
英文摘要	A paleoglacier reconstruction during the Last Glacial Maximum (LGM) is presented for a high mountain area of La Covacha massif in Sierra de Gredos (Iberian Central System) in central Spain. The moraines that, according with the previous literature, had formed during the global LGM, were mapped through photo interpretation of digital aerial photographs and 3D images and detailed field surveys. The topography of the paleoglaciers was estimated using a simple steady-state model that assumed a perfectly plastic ice rheology, reconstructing the theoretical ice profiles and obtaining the ice thickness of the glaciers during the LGM. The reconstruction of the glaciers was carried out using automated and semi-automated physically-based models, obtaining more realistic results with semi-automated models. According to our study, the paleoglaciers in the study area covered an area of 34.79 km(2) during the global LGM, with a maximum ice thickness of 366 meters in La Vega gorge, a total volume of 34.25 x 10(8) m(3) and a mean paleoELA of 1932 meters. Most of the ice (approximate to 82%) was in paleoglaciers facing north, and the rest was in paleoglaciers with other orientations. This emphasizes the importance of orientation in relation to glacier dynamics and ice accumulation. The results obtained in the calculation of paleoELAs during the global LGM in Gredos are average compared to the Iberian mountains of the Northwest where the values were much lower, and with respect to those of the Southwest, much higher. This demonstrates the importance of the exposure of Mediterranean mountains to the humidity sources coming from the NW during the global LGM, as is the case at present.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000471607300009
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46513]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.6
推荐引用方式 GB/T 7714	Campos, Nestor,Palacios, David,Tanarro, Luis M.. Glacier reconstruction of La Covacha Massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(6):1336-1352.
APA	Campos, Nestor,Palacios, David,&Tanarro, Luis M..(2019).Glacier reconstruction of La Covacha Massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum.JOURNAL OF MOUNTAIN SCIENCE,16(6),1336-1352.
MLA	Campos, Nestor,et al."Glacier reconstruction of La Covacha Massif in Sierra de Gredos (central Spain) during the Last Glacial Maximum".JOURNAL OF MOUNTAIN SCIENCE 16.6(2019):1336-1352.