气候变化领域集成服务门户(CCPortal): Snow Moving to Higher Elevations: Analyzing Three Decades of Snowline Dynamics in the Alps

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DOI	10.1029/2019GL085742
	Snow Moving to Higher Elevations: Analyzing Three Decades of Snowline Dynamics in the Alps
	Hu Z.; Dietz A.; Zhao A.; Uereyen S.; Zhang H.; Wang M.; Mederer P.; Kuenzer C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	In the Alps, snow cover dynamics can be monitored using Earth observation (EO). However, low revisit frequency and cloud cover pose a challenge to long-term time series analysis using high spatial resolution EO images. In this study, we applied the random forest regression to model regional snowline elevations (RSEs). In this manner, daily snowline dynamics and their long-term trends can be derived, despite the aforementioned challenges. Of the six investigated Alpine catchments between 1984 and 2018, a significant increasing trend of RSEs is shown in four catchments in the early ablation seasons (between 5.38 ± 2.64 and 11.29 ± 4.79 m·a−1) and five catchments in the middle ablation seasons (between 4.17 ± 2.62 and 8.76 ± 4.42 m·a−1). On average, the random forest regression models can explain 75% of the RSE variations. Furthermore, air temperature was found influential in snow persistence especially during middle and late ablation seasons. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ablation; Catchments; Decision trees; Dynamics; Logistic regression; Random forests; Runoff; Time series analysis; Air temperature; Alpine catchments; Earth observations; High spatial resolution; Long-term trend; Regression model; Snow-cover dynamics; Snow-line dynamics; Snow; air temperature; catchment; cloud cover; elevation; EOS; image resolution; persistence; seasonal variation; snow cover; snowline; spatial resolution; Alps
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170204
作者单位	German Remote Sensing Data Center (DFD), German Aerospace Center (DLR), Weßling, Germany; Now at Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, Utrecht, Netherlands; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom; Institute of Geography and Geology, University of Wuerzburg, Wuerzburg, Germany; Department of Physical Geography, Catholic University of Eichstaett-Ingolstadt, Ingolstadt, Germany
推荐引用方式 GB/T 7714	Hu Z.,Dietz A.,Zhao A.,et al. Snow Moving to Higher Elevations: Analyzing Three Decades of Snowline Dynamics in the Alps[J],2020,47(12).
APA	Hu Z..,Dietz A..,Zhao A..,Uereyen S..,Zhang H..,...&Kuenzer C..(2020).Snow Moving to Higher Elevations: Analyzing Three Decades of Snowline Dynamics in the Alps.Geophysical Research Letters,47(12).
MLA	Hu Z.,et al."Snow Moving to Higher Elevations: Analyzing Three Decades of Snowline Dynamics in the Alps".Geophysical Research Letters 47.12(2020).