气候变化领域集成服务门户(CCPortal): Glacier area and length changes in Norway from repeat inventories

CCPortal

DOI	10.5194/tc-8-1885-2014
	Glacier area and length changes in Norway from repeat inventories
	Winsvold S.H.; Andreassen L.M.; Kienholz C.
发表日期	2014
ISSN	19940416
卷号	8 期号:5
英文摘要	In this study, we assess glacier area and length changes in mainland Norway from repeat Landsat TM/ETM+-derived inventories and digitized topographic maps. The multioral glacier inventory consists of glacier outlines from three time ranges: 1947 to 1985 (GIn50), 1988 to 1997 (GI1990), and 1999 to 2006 (GI2000). For the northernmost regions, we include an additional inventory (GI1900) based on historic maps surveyed between 1895 and 1907. Area and length changes are assessed per glacier unit, 36 subregions, and for three main parts of Norway: southern, central, and northern. The results show a decrease in the glacierized area from 2994 km2 in GIn50 to 2668 km2 in GI2000 (total 2722 glacier units), corresponding to an area reduction of g'326 km2, or g-'11% of the initial GIn50 area. The average length change for the full epoch (within GIn50 and GI2000) is g-'240 m. Overall, the comparison reveals both area and length reductions as general patterns, even though some glaciers have advanced. The three northernmost subregions show the highest retreat rates, whereas the central part of Norway shows the lowest change rates. Glacier area and length changes indicate that glaciers in maritime areas in southern Norway have retreated more than glaciers in the interior, and glaciers in the north have retreated more than southern glaciers. These observed spatial trends in glacier change are related to a combination of several factors such as glacier geometry, elevation, and continentality, especially in southern Norway.
学科领域	cryosphere; glacial history; glacier dynamics; inventory; Landsat thematic mapper; Norway
语种	英语
scopus关键词	cryosphere; glacial history; glacier dynamics; inventory; Landsat thematic mapper; Norway
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/120043
作者单位	Department of Geosciences, University of Oslo, P.O. Box 1047, Blindern, Oslo 0316, Norway; Section for Glaciers, Ice and Snow, Hydrology Department, Norwegian Water Resources and Energy Directorate, P.O. Box 5091, Majorstua, Oslo 0301, Norway; Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Drive, Fairbanks, AK 99775-7320, United States
推荐引用方式 GB/T 7714	Winsvold S.H.,Andreassen L.M.,Kienholz C.. Glacier area and length changes in Norway from repeat inventories[J],2014,8(5).
APA	Winsvold S.H.,Andreassen L.M.,&Kienholz C..(2014).Glacier area and length changes in Norway from repeat inventories.Cryosphere,8(5).
MLA	Winsvold S.H.,et al."Glacier area and length changes in Norway from repeat inventories".Cryosphere 8.5(2014).