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Self-organizing map network-based precipitation regionalization for the Tibetan Plateau and regional precipitation variability
Wang, Nini1,2; Yin, Jianchuan3,4
2019
Source PublicationTHEORETICAL AND APPLIED CLIMATOLOGY
ISSN0177-798X
Volume135Issue:1-2Pages:29-44
Corresponding AuthorYin, Jianchuan(yinjianchuan@dlmu.edu.cn)
AbstractA precipitation-based regionalization for the Tibetan Plateau (TP) was investigated for regional precipitation trend analysis and frequency analysis using data from 1113 grid points covering the period 1900-2014. The results utilizing self-organizing map (SOM) network suggest that four clusters of precipitation coherent zones can be identified, including the southwestern edge, the southern edge, the southeastern region, and the north central region. Regionalization results of the SOM network satisfactorily represent the influences of the atmospheric circulation systems such as the East Asian summer monsoon, the south Asian summer monsoon, and the mid-latitude westerlies. Regionalization results also well display the direct impacts of physical geographical features of the TP such as orography, topography, and land-sea distribution. Regional-scale annual precipitation trend as well as regional differences of annual and seasonal total precipitation were investigated by precipitation index such as precipitation concentration index (PCI) and Standardized Anomaly Index (SAI). Results demonstrate significant negative long-term linear trends in southeastern TP and the north central part of the TP, indicating arid and semi-arid regions in the TP are getting drier. The empirical mode decomposition (EMD) method shows an evolution of the main cycle with 4 and 12 months for all the representative grids of four sub-regions. The cross-wavelet analysis suggests that predominant and effective period of Indian Ocean Dipole (IOD) on monthly precipitation is around similar to 12 months, except for the representative grid of the northwestern region.
DOI10.1007/s00704-017-2349-5
WOS KeywordSUMMER PRECIPITATION ; WAVELET TRANSFORM ; CLUSTER-ANALYSIS ; TEMPERATURES ; DIPOLE ; IRAN
Indexed BySCI
Language英语
Funding ProjectDoctoral Scientific Research Foundation of Liaoning Province[201601080] ; Fundamental Research Funds for the Central Universities of China[3132017049]
Funding OrganizationDoctoral Scientific Research Foundation of Liaoning Province ; Fundamental Research Funds for the Central Universities of China
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000459226500003
PublisherSPRINGER WIEN
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/49448
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYin, Jianchuan
Affiliation1.Dalian Maritime Univ, Coll Sci, Dalian 116026, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Dalian Maritime Univ, Nav Coll, Dalian 116026, Peoples R China
4.Dalian Maritime Univ, Ctr Intelligent Marine Vehicles, Dalian 116026, Peoples R China
Recommended Citation
GB/T 7714
Wang, Nini,Yin, Jianchuan. Self-organizing map network-based precipitation regionalization for the Tibetan Plateau and regional precipitation variability[J]. THEORETICAL AND APPLIED CLIMATOLOGY,2019,135(1-2):29-44.
APA Wang, Nini,&Yin, Jianchuan.(2019).Self-organizing map network-based precipitation regionalization for the Tibetan Plateau and regional precipitation variability.THEORETICAL AND APPLIED CLIMATOLOGY,135(1-2),29-44.
MLA Wang, Nini,et al."Self-organizing map network-based precipitation regionalization for the Tibetan Plateau and regional precipitation variability".THEORETICAL AND APPLIED CLIMATOLOGY 135.1-2(2019):29-44.
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