气候变化领域集成服务门户(CCPortal): Changes in the End-of-Summer Snow Line Altitude of Summer-Accumulation-Type Glaciers in the Eastern Tien Shan Mountains from 1994 to 2016

CCPortal

DOI	10.3390/rs13061080
	Changes in the End-of-Summer Snow Line Altitude of Summer-Accumulation-Type Glaciers in the Eastern Tien Shan Mountains from 1994 to 2016
	Yue, Xiaoying; Li, Zhongqin; Zhao, Jun; Li, Huilin; Wang, Puyu; Wang, Lin
通讯作者	Li, HL (通讯作者)，Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China.
发表日期	2021
EISSN	2072-4292
卷号	13 期号:6
英文摘要	For summer-accumulation-type glaciers, the glaciological literature is lacking studies on determining the snow line altitude (SLA) from optical images at the end of the summer as an indicator of the equilibrium line altitude (ELA). This paper presents a workflow for extracting the SLA from Landsat images based on the variation in the albedo with the altitude in the central line area of glaciers. The correlation of >0.8 at the 99% confidence level between the retrieved SLAs with ELAs derived from the interpolation of ground-based, mass balance measurements indicated that the workflow can be applied to derive the SLA from end-of-summer satellite data as an indicator of ELA. The ELA was under-estimated by the calculated SLA. The relationship between the end-of-summer SLA and the ELA depends on the intensity of glacier melting. Subsequently, the workflow was applied to the seven glaciers in the Eastern Tien Shan Mountains, and a time series of the SLA was obtained using 12 end-of-summer Landsat scenes from 1994 to 2016. Over the whole study period, a mean SLA of 4011.6 +/- 20.7 m above sea level (a.s.l.) was derived for the seven investigated glaciers, and an increasing SLA was demonstrated. The increase in SLAs was consistent for the seven glaciers from 1994 to 2016. Concerning the spatial variability, the east-west difference was prominent, and these differences exhibited a decreasing trend. The average SLA of each glacier is more influenced by its morpho-topographic variables. The interannual variations in the average SLA are mainly driven by the increasing summer air temperature, and the high correlation with the cumulative summer solid precipitation reflects the characteristics of the summer-accumulation-type glaciers.
关键词	EQUILIBRIUM-LINE MASS-BALANCE NO. 1 SURFACE ALBEDO LANDSAT TM TIANSHAN MOUNTAINS TRANSIENT SNOWLINE QILIAN MOUNTAINS QIYI GLACIER FRENCH ALPS
英文关键词	snow line altitude; equilibrium line altitude; broadband albedo; spatio-temporal changes; summer-accumulation-type glacier
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000651946100001
来源期刊	REMOTE SENSING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253857
作者单位	[Yue, Xiaoying; Li, Zhongqin; Li, Huilin; Wang, Puyu; Wang, Lin] Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Li, Zhongqin; Zhao, Jun] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yue, Xiaoying,Li, Zhongqin,Zhao, Jun,et al. Changes in the End-of-Summer Snow Line Altitude of Summer-Accumulation-Type Glaciers in the Eastern Tien Shan Mountains from 1994 to 2016[J]. 中国科学院西北生态环境资源研究院,2021,13(6).
APA	Yue, Xiaoying,Li, Zhongqin,Zhao, Jun,Li, Huilin,Wang, Puyu,&Wang, Lin.(2021).Changes in the End-of-Summer Snow Line Altitude of Summer-Accumulation-Type Glaciers in the Eastern Tien Shan Mountains from 1994 to 2016.REMOTE SENSING,13(6).
MLA	Yue, Xiaoying,et al."Changes in the End-of-Summer Snow Line Altitude of Summer-Accumulation-Type Glaciers in the Eastern Tien Shan Mountains from 1994 to 2016".REMOTE SENSING 13.6(2021).