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[1]REN Jiancheng,WANG Feng,LU Xiaoning.Characteristics of Spatiotemporal Variation of Annual Precipitation in Shandong Province Based on EOF and Wavelet Analysis[J].Research of Soil and Water Conservation,2022,29(02):179-183.

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Characteristics of Spatiotemporal Variation of Annual Precipitation in Shandong Province Based on EOF and Wavelet Analysis

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 02 Page number: 179-183 Column: Public date: 2022-03-20

Title:: Characteristics of Spatiotemporal Variation of Annual Precipitation in Shandong Province Based on EOF and Wavelet Analysis

Author(s):: REN Jiancheng^1,2, WANG Feng², LU Xiaoning³; (1.Shandong Key Laboratory of Meteorological Disaster Prevention and Reduction, Jinan 250031,China; 2.Binzhou Meteorological Bureau, Binzhou, Shandong 256612, China; 3.Chengdu University of Information Technology, Chengdu 610225, China)

Keywords:: climate characteristics; annual precipitation; empirical orthogonal function; wavelet analysis; Shandong Province

CLC:: P426.6

DOI:: -

Abstract:: To explore the temporal and spatial variation characteristics of annual precipitation in Shandong Province, based on the monthly precipitation data of 29 national basic and benchmark surface meteorological stations in Shandong Province from 1980 to 2019, the variation characteristics of annual precipitation in Shandong Province were analyzed and discussed by means of empirical orthogonal decomposition(EOF)and wavelet analysis. The results showed that: the annual precipitation in Shandong Province ranged from 507.0 mm to 1 047.4 mm, and decreased from southeast to northwest in general; the annual precipitation field in Shandong Province mainly had 2 modes, there were 4 types of precipitation in Shandong Province, which were rainy in the whole province, less rainy in the whole province, more precipitation in the southeast, less precipitation in the northwest, and less precipitation in the southeast and more precipitation in the northwest; the number of years of 4 types of precipitation fields in Shandong Province in the past 40 years was 12 years, 12 years, 2 years and 4 years, respectively; the accuracy of the actual verification of the 4 types of precipitation distribution years was 96.7%; there were 3～9 years of annual variation period of annual precipitation in Shandong Province, and the interval of 15～32 years; the main periods were 28 years, 18 years, 4 years and 7 years, which had experienced about 2, 3, 15 and 8.5 wet-dry transition periods, respectively. The annual precipitation in Shandong Province gradually decreased from southeast to northwest. The annual precipitation field had 2 modes and 4 performance types, and had the characteristics of multi time scale cycle.

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Last Update: 2022-04-20