气候变化领域集成服务门户(CCPortal): Assessing reliability of precipitation data over the Mekong River Basin: A comparison of ground-based, satellite, and reanalysis datasets

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DOI	10.1002/joc.5670
	Assessing reliability of precipitation data over the Mekong River Basin: A comparison of ground-based, satellite, and reanalysis datasets
	Chen, Aifang; Chen, Deliang; Azorin-Molina, Cesar
通讯作者	Chen, DL (通讯作者)
发表日期	2018
ISSN	0899-8418
EISSN	1097-0088
起始页码	4314
结束页码	4334
卷号	38 期号:11
英文摘要	Accurate precipitation data are the basis for hydro-climatological studies. As a highly populated river basin, with the biggest inland fishery in Southeast Asia, freshwater dynamics is extremely important for the Mekong River Basin (MB). This study focuses on evaluating the reliability of existing gridded precipitation datasets both from satellite and reanalysis, with a ground observations-based gridded precipitation dataset as the reference. Two satellite products (Tropical Rainfall Measuring Mission [TRMM] and the Precipitation Estimation from Remote Sensing Information using an Artificial Neural NetworkClimate Data Record [PERSIANN-CDR]), as well as three reanalysis products (Modern-Era Retrospective analysis for Research and Applications [MERRA2], the European Centre for Medium-Range Weather Forecasts interim reanalysis [ERA-Interim], and the Climate Forecast System Reanalysis [CFSR]) were compared with the Asian PrecipitationHighly Resolved Observational Data Integration Towards Evaluation of Water Resources (APHRODITE) over the MB. The APHRODITE was chosen as the reference for the comparison because it was developed based on ground observations and has also been selected as reference data in previous studies. Results show that most of the assessed datasets are able to capture the major climatological characteristics of precipitation in the MB for the 10-year study period (1998-2007). Generally, both satellite data (TRMM and PERSIANN-CDR) show higher reliability than reanalysis products at both spatial and temporal scales across the MB, with the TRMM outperforming when compared to the PERSIANN-CDR. For the reanalysis products, MERRA2 is more reliable in terms of temporal variability, but with some underestimation of precipitation. The other two reanalysis products CFSR and ERA-Interim are relatively unreliable due to large overestimations. CFSR is better positioned to capture the spatial variability of precipitation, while ERA-Interim shows inconsistent spatial patterns but more realistically resembles the daily precipitation probability. These findings have practical implications for future hydro-climatological studies.
关键词	RAIN-GAUGE OBSERVATIONS HYDROLOGICAL CYCLE WAVELET ANALYSIS TIBETAN PLATEAU DENSE NETWORK ANALYSIS TMPA TIME-SERIES PRODUCTS CLIMATE PERFORMANCE
英文关键词	Mekong River Basin; precipitation evaluation; rain gauge observations; reanalysis data; satellite data
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000443683600019
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259143
推荐引用方式 GB/T 7714	Chen, Aifang,Chen, Deliang,Azorin-Molina, Cesar. Assessing reliability of precipitation data over the Mekong River Basin: A comparison of ground-based, satellite, and reanalysis datasets[J]. 中国科学院青藏高原研究所,2018,38(11).
APA	Chen, Aifang,Chen, Deliang,&Azorin-Molina, Cesar.(2018).Assessing reliability of precipitation data over the Mekong River Basin: A comparison of ground-based, satellite, and reanalysis datasets.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(11).
MLA	Chen, Aifang,et al."Assessing reliability of precipitation data over the Mekong River Basin: A comparison of ground-based, satellite, and reanalysis datasets".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.11(2018).