干旱区生态环境知识资源中心(Arid): Characterizing Snow Dynamics in Semi-Arid Mountain Regions with Multitemporal Sentinel-1 Imagery: A Case Study in the Sierra Nevada, Spain

Arid

DOI	10.3390/rs15225365
	Characterizing Snow Dynamics in Semi-Arid Mountain Regions with Multitemporal Sentinel-1 Imagery: A Case Study in the Sierra Nevada, Spain
	Torralbo, Pedro; Pimentel, Rafael; Polo, Maria Jose; Notarnicola, Claudia
通讯作者	Torralbo, P
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2023
卷号	15 期号:22
英文摘要	Monitoring snowmelt dynamics in mountains is crucial to understand water releases downstream. Sentinel-1 (S-1) synthetic-aperture radar (SAR) has become one of the most widely used techniques to achieve this aim due to its high frequency of acquisitions and all-weather capability. This work aims to understand the possibilities of S-1 SAR imagery to capture snowmelt dynamics and related changes in streamflow response in semi-arid mountains. The results proved that S-1 SAR imagery was able not only to capture the final spring melting but also all melting cycles that commonly appear throughout the year in these types of environments. The general change detection approach to identify wet snow was adapted for these regions using as reference the average S-1 SAR image from the previous summer, and a threshold of -3.00 dB, which has been assessed using Landsat images as reference dataset obtaining a general accuracy of 0.79. In addition, four different types of melting-runoff onsets depending on physical snow condition were identified. When translating that at the catchment scale, distributed melting-runoff onset maps were defined to better understand the spatiotemporal evolution of melting dynamics. Finally, a linear connection between melting dynamics and streamflow was found for long-lasting melting cycles, with a determination coefficient (R2) ranging from 0.62 to 0.83 and an average delay between the melting onset and streamflow peak of about 21 days.
英文关键词	wet snow Sentinel-1 C-band synthetic-aperture radar (SAR) Mediterranean mountains semi-arid regions streamflow dynamics
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:001113856300001
WOS关键词	ERS-1 SAR DATA ; WET-SNOW ; ACCURACY ASSESSMENT ; COVERED AREA ; BAND SAR ; RADAR OBSERVATIONS ; SOIL-MOISTURE ; TIME-SERIES ; MODIS ; WATER
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398344
推荐引用方式 GB/T 7714	Torralbo, Pedro,Pimentel, Rafael,Polo, Maria Jose,et al. Characterizing Snow Dynamics in Semi-Arid Mountain Regions with Multitemporal Sentinel-1 Imagery: A Case Study in the Sierra Nevada, Spain[J],2023,15(22).
APA	Torralbo, Pedro,Pimentel, Rafael,Polo, Maria Jose,&Notarnicola, Claudia.(2023).Characterizing Snow Dynamics in Semi-Arid Mountain Regions with Multitemporal Sentinel-1 Imagery: A Case Study in the Sierra Nevada, Spain.REMOTE SENSING,15(22).
MLA	Torralbo, Pedro,et al."Characterizing Snow Dynamics in Semi-Arid Mountain Regions with Multitemporal Sentinel-1 Imagery: A Case Study in the Sierra Nevada, Spain".REMOTE SENSING 15.22(2023).