干旱区生态环境知识资源中心(Arid): Radar Altimetry as a Proxy for Determining Terrestrial Water Storage Variability in Tropical Basins

Arid

DOI	10.3390/rs11212487
	Radar Altimetry as a Proxy for Determining Terrestrial Water Storage Variability in Tropical Basins
	Melo, Davi de C. D.1; Getirana, Augusto 2,3
通讯作者	Getirana, Augusto
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2019
卷号	11 期号:21
英文摘要	The Gravity Recovery and Climate Experiment (GRACE) mission has provided us with unforeseen information on terrestrial water-storage (TWS) variability, contributing to our understanding of global hydrological processes, including hydrological extreme events and anthropogenic impacts on water storage. Attempts to decompose GRACE-based TWS signals into its different water storage layers, i.e., surface water storage (SWS), soil moisture, groundwater and snow, have shown that SWS is a principal component, particularly in the tropics, where major rivers flow over arid regions at high latitudes. Here, we demonstrate that water levels, measured with radar altimeters at a limited number of locations, can be used to reconstruct gridded GRACE-based TWS signals in the Amazon basin, at spatial resolutions ranging from 0.5 to 3 degrees, with mean absolute errors (MAE) as low as 2.5 cm and correlations as high as 0.98. We show that, at 3 degrees spatial resolution, spatially-distributed TWS time series can be precisely reconstructed with as few as 41 water-level time series located within the basin. The proposed approach is competitive when compared to existing TWS estimates derived from physically based and computationally expensive methods. Also, a validation experiment indicates that TWS estimates can be extrapolated to periods beyond that of the model regression with low errors. The approach is robust, based on regression models and interpolation techniques, and offers a new possibility to reproduce spatially and temporally distributed TWS that could be used to fill inter-mission gaps and to extend GRACE-based TWS time series beyond its timespan.
英文关键词	GRACE radar altimetry Amazon terrestrial water storage surface water
类型	Article
语种	英语
国家	Brazil ; USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000504716700028
WOS关键词	DATA ASSIMILATION ; GROUNDWATER DEPLETION ; AMAZON BASIN ; IN-SITU ; SPATIAL INTERPOLATION ; CLIMATE EXPERIMENT ; GRAVITY RECOVERY ; HIGH-RESOLUTION ; RIVER-BASIN ; GRACE
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
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310568
作者单位	1.Univ Fed Paraiba, Dept Soils & Rural Engn, BR-58397000 Areia, PB, Brazil; 2.NASA Goddard Space Flight Ctr, Hydrol Sci Lab, Greenbelt, MD 20771 USA; 3.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA
推荐引用方式 GB/T 7714	Melo, Davi de C. D.,Getirana, Augusto. Radar Altimetry as a Proxy for Determining Terrestrial Water Storage Variability in Tropical Basins[J],2019,11(21).
APA	Melo, Davi de C. D.,&Getirana, Augusto.(2019).Radar Altimetry as a Proxy for Determining Terrestrial Water Storage Variability in Tropical Basins.REMOTE SENSING,11(21).
MLA	Melo, Davi de C. D.,et al."Radar Altimetry as a Proxy for Determining Terrestrial Water Storage Variability in Tropical Basins".REMOTE SENSING 11.21(2019).