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DOI	10.1175/JCLI-D-18-0637.1
	Assessment of three common methods for estimating terrestrial water storage change with three reanalysis datasets
	Deng S.; Liu S.; Mo X.
发表日期	2020
ISSN	0894-8755
起始页码	511
结束页码	525
卷号	33 期号:2
英文摘要	Terrestrial water storage change (TWSC) plays a crucial role in the hydrological cycle and climate system. To date, methods including 1) the terrestrial water balance method (PER), 2) the combined atmospheric and terrestrial water balance method (AT), and 3) the summation method (SS) have been developed to estimate TWSC, but the accuracy of these methods has not been systematically compared. This paper compares the spatial and temporal differences of the TWSC estimates by the three methods comprehensively with the GRACE data during the 2002-13 period. To avoid the impact of different inputs in the comparison, three advanced reanalysis datasets are used, namely 1) the National Centers for Environmental Prediction (NCEP)-Department of Energy (DOE) Reanalysis II (NCEP R2), 2) the ECMWF interim reanalysis (ERA-Interim), and 3) the Japanese 55-Year Reanalysis (JRA-55). The results show that all estimates with PER and AT considerably overestimate the long-term mean on a regional scale because the data assimilation in the reanalysis opens the water budget. The difficulty of atmospheric observation and simulation in arid and polar tundra regions is the documented reason for the failure of the AT method to represent the TWSC phase over 30% of the region found in this study. Although the SS result exhibited the best overall agreement with GRACE, the amplitude of TWSC based on SS differed substantially from that of GRACE and the similarity coefficient of the global distribution between the SS-derived estimate and GRACE is still not high. More detailed considerations of groundwater and human activities, for example, irrigation and reservoir impoundments, can help SS to achieve a higher accuracy. © 2019 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Budget control; Climate change; Digital storage; Groundwater; Atmospheric observations; Department of Energy; Global distribution; National centers for environmental predictions; Similarity coefficients; Temporal differences; Terrestrial water storage; Water balance method; Reservoirs (water); assessment method; data set; estimation method; GRACE; hydrological cycle; spatiotemporal analysis; water budget; water storage
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171485
作者单位	Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, University of Chinese Academy of Sciences, College of Resources and Environment, Sino-Danish College, Beijing, China
推荐引用方式 GB/T 7714	Deng S.,Liu S.,Mo X.. Assessment of three common methods for estimating terrestrial water storage change with three reanalysis datasets[J],2020,33(2).
APA	Deng S.,Liu S.,&Mo X..(2020).Assessment of three common methods for estimating terrestrial water storage change with three reanalysis datasets.Journal of Climate,33(2).
MLA	Deng S.,et al."Assessment of three common methods for estimating terrestrial water storage change with three reanalysis datasets".Journal of Climate 33.2(2020).