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An improved statistical downscaling scheme of Tropical Rainfall Measuring Mission precipitation in the Heihe River basin, China
Zhao, Na1,2,3; Yue, Tianxiang1,2,3; Chen, Chuanfa4; Zhao, Mingwei5; Fan, Zemeng1,2,3
2018-06-30
Source PublicationINTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
Volume38Issue:8Pages:3309-3322
Corresponding AuthorZhao, Na(zhaon@lreis.ac.cn)
AbstractEstimating an accurate spatial distribution of precipitation with high resolution is necessary for hydrological and ecological applications, especially in data-scarce and terrain-complicated river basins. Satellite-based precipitation data have been widely used to measure the spatial patterns of precipitation, but an improvement in accuracy and resolution is needed. In this article, a new statistical downscaling method is proposed to generate improved monthly precipitation fields at a higher spatial resolution of 1km in Heihe River basin (HRB), China. The presented methods employed the geographical weighted regression (GWR) method to explore the non-stationarity between precipitation and its factors, and used the high-accuracy surface modelling method (HASM) to compensate for the errors produced in the GWR downscaling process. The GWR model was first established under five different spatial scales, and the optimal relation between precipitation derived from the Tropical Rainfall Measuring Mission (TRMM) and its influencing factors was found for each month. The errors caused during the scale change were modified by performing HASM as a data merging framework, which considered both the local climate characteristics and meteorological observations. Results showed that the GWR downscaling method could not generate spatial patterns of precipitation similar to those of the original TRMM products. Although the performance of the GWR method after residual interpolations using Kriging, IDW, and tension Spline was improved, there existed significant variations in some regions, and the accuracy of those methods was still not satisfactory. In comparison with the other four models, GWR-HASM showed better performance in reproducing the precipitation field at a high spatial resolution. Results indicate that the proposed downscaling method appears feasible for precipitation estimation in data-scarce river basins.
Keyworddownscaling Heihe River basin precipitation TRMM
DOI10.1002/joc.5502
WOS KeywordDISTRIBUTED HYDROLOGICAL MODEL ; REGIONAL CLIMATE MODEL ; INTERPOLATION ; RESOLUTION ; ALGORITHM ; NDVI ; INFORMATION ; UNCERTAINTY ; TEMPERATURE ; VALIDATION
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41701456] ; National Natural Science Foundation of China[41421001] ; National Natural Science Foundation of China[91425304] ; Key Programs of the Chinese Academy of Sciences[QYZDY-SSW-DQC007]
Funding OrganizationNational Natural Science Foundation of China ; Key Programs of the Chinese Academy of Sciences
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000439793900008
PublisherWILEY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54476
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhao, Na
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Jiangsu, Peoples R China
4.Shandong Univ Sci & Technol, Geomat Coll, Qingdao, Peoples R China
5.Chuzhou Univ, Auhui Ctr Collaborat Innovat Geog Informat Integr, Chuzhou, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Na,Yue, Tianxiang,Chen, Chuanfa,et al. An improved statistical downscaling scheme of Tropical Rainfall Measuring Mission precipitation in the Heihe River basin, China[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(8):3309-3322.
APA Zhao, Na,Yue, Tianxiang,Chen, Chuanfa,Zhao, Mingwei,&Fan, Zemeng.(2018).An improved statistical downscaling scheme of Tropical Rainfall Measuring Mission precipitation in the Heihe River basin, China.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(8),3309-3322.
MLA Zhao, Na,et al."An improved statistical downscaling scheme of Tropical Rainfall Measuring Mission precipitation in the Heihe River basin, China".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.8(2018):3309-3322.
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