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DOI	10.1029/2022JF006599
	Glacier Surface Speed Variations on the Kenai Peninsula, Alaska, 2014-2019
	Yang, Ruitang; Hock, Regine; Kang, Shichang; Guo, Wanqin; Shangguan, Donghui; Jiang, Zongli; Zhang, Qibing
通讯作者	Yang, RT ; Guo, WQ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Peoples R China. ; Yang, RT (通讯作者)，Univ Oslo, Dept Geosci, Oslo, Norway. ; Yang, RT (通讯作者)，Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA. ; Yang, RT (通讯作者)，Univ Chinese Acad Sci, Beijing, Peoples R China.
发表日期	2022
ISSN	2169-9003
EISSN	2169-9011
卷号	127 期号:3
英文摘要	To characterize the spatiotemporal variations of glacier surface speed on the Kenai Peninsula, Alaska (similar to 3,900 km(2)), we derived 92 surface speed fields between October 2014 and December 2019 using intensity offset tracking on Sentinel-1 data. On average, speeds are 50% greater in spring (March-May) than the annual mean (69 m a(-1)) while winter speeds are close to the annual mean. While marine-terminating glaciers have their maximum speed near the terminus, both land- and lake-terminating glaciers flow fastest around the median glacier elevation. On average, the lake-terminating and tidewater glaciers flow 1.7 and 2.3 times faster than the land-terminating glaciers, respectively. Monthly variations over the 5-year period are strikingly synchronous regardless of terminus type suggesting that regional-scale meteorological drivers govern the temporal variability. Mean annual speeds fluctuate roughly +/- 10% of the period mean without an apparent trend. At lake-terminating Bear Glacier, a short-term tripling in ice speed in fall 2019 over the area below an ice-dammed lake coincides with an observed glacier lake outburst flood (GLOF). An earlier GLOF caused a persistent breach of the beach barrier between the proglacial lake and ocean which likely led to overall speed-up of the lower glacier part throughout 2019. A significant speedup was also observed at the lower part of the lake-terminating Ellsworth Glacier and attributed to rapid glacier retreat and lake expansion, probably further amplified by the terminus area becoming buoyant and a large tabular iceberg breaking off. Our results highlight the impact of GLOFs and proglacial characteristics in spatial and temporal glacier speed variations.
关键词	SUBGLACIAL WATER-PRESSURE TERMINATING OUTLET GLACIERS TIDEWATER GLACIER ICE DISCHARGE SAR INTERFEROMETRY SPATIAL-PATTERNS FRONTAL ABLATION VELOCITY CHANGES RAPID RETREAT MASS-BALANCE
英文关键词	glacier; glacier velocity; remote sensing; Kenai Peninsula in Alaska; glacier outburst flood (GLOF); Sentinel-1
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000776590100017
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
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/254359
作者单位	[Yang, Ruitang; Kang, Shichang; Guo, Wanqin; Shangguan, Donghui] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Peoples R China; [Yang, Ruitang; Hock, Regine] Univ Oslo, Dept Geosci, Oslo, Norway; [Yang, Ruitang; Hock, Regine] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA; [Yang, Ruitang; Kang, Shichang] Univ Chinese Acad Sci, Beijing, Peoples R China; [Jiang, Zongli] Hunan Univ Sci & Technol, Sch Resource Environm & Safety Engn, Xiangtan, Peoples R China; [Zhang, Qibing] Hunan Univ Arts & Sci, Coll Geog & Tourism, Changde, Peoples R China
推荐引用方式 GB/T 7714	Yang, Ruitang,Hock, Regine,Kang, Shichang,et al. Glacier Surface Speed Variations on the Kenai Peninsula, Alaska, 2014-2019[J]. 中国科学院西北生态环境资源研究院,2022,127(3).
APA	Yang, Ruitang.,Hock, Regine.,Kang, Shichang.,Guo, Wanqin.,Shangguan, Donghui.,...&Zhang, Qibing.(2022).Glacier Surface Speed Variations on the Kenai Peninsula, Alaska, 2014-2019.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,127(3).
MLA	Yang, Ruitang,et al."Glacier Surface Speed Variations on the Kenai Peninsula, Alaska, 2014-2019".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 127.3(2022).