气候变化领域集成服务门户(CCPortal): A method for monthly mapping of wet and dry snow using Sentinel-1 and MODIS: Application to a Himalayan river basin

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DOI	10.1016/j.jag.2018.09.011
	A method for monthly mapping of wet and dry snow using Sentinel-1 and MODIS: Application to a Himalayan river basin
	Snapir B.; Momblanch A.; Jain S.K.; Waine T.W.; Holman I.P.
发表日期	2019
ISSN	15698432
起始页码	222
结束页码	230
卷号	74
英文摘要	Satellite Remote Sensing, with both optical and SAR instruments, can provide distributed observations of snow cover over extended and inaccessible areas. Both instruments are complementary, but there have been limited attempts at combining their measurements. We describe a novel approach to produce monthly maps of dry and wet snow areas through application of data fusion techniques to MODIS fractional snow cover and Sentinel-1 wet snow mask, facilitated by Google Earth Engine. The method is demonstrated in a 55,000 km 2 river basin in the Indian Himalayan region over a period of ∼2.5 years, although it can be applied to any areas of the world where Sentinel-1 data are routinely available. The typical underestimation of wet snow area by SAR is corrected using a digital elevation model to estimate the average melting altitude. We also present an empirical model to derive the fractional cover of wet snow from Sentinel-1. Finally, we demonstrate that Sentinel-1 effectively complements MODIS as it highlights a snowmelt phase which occurs with a decrease in snow depth but no/little decrease in snowpack area. Further developments are now needed to incorporate these high resolution observations of snow areas as inputs to hydrological models for better runoff analysis and improved management of water resources and flood risk. © 2018 Elsevier B.V.
英文关键词	Google Earth Engine; Himalayas; MODIS; Sentinel-1; Snow
语种	英语
scopus关键词	mapping method; MODIS; remote sensing; river basin; Sentinel; snow; synthetic aperture radar; Himalayas; India
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156573
作者单位	Cranfield University, Bedfordshire, MK43 0AL, United Kingdom; Water Resources Systems Division, National Institute of Hydrology, Roorkee, India
推荐引用方式 GB/T 7714	Snapir B.,Momblanch A.,Jain S.K.,et al. A method for monthly mapping of wet and dry snow using Sentinel-1 and MODIS: Application to a Himalayan river basin[J],2019,74.
APA	Snapir B.,Momblanch A.,Jain S.K.,Waine T.W.,&Holman I.P..(2019).A method for monthly mapping of wet and dry snow using Sentinel-1 and MODIS: Application to a Himalayan river basin.International Journal of Applied Earth Observation and Geoinformation,74.
MLA	Snapir B.,et al."A method for monthly mapping of wet and dry snow using Sentinel-1 and MODIS: Application to a Himalayan river basin".International Journal of Applied Earth Observation and Geoinformation 74(2019).