[1]LIU Zhenghong.Analysis of Spatiotemporal Variation Characteristics of Precipitation in the Past Five Decades in Shaanxi Province[J].Research of Soil and Water Conservation,2015,22(02):107-112.
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Analysis of Spatiotemporal Variation Characteristics of Precipitation in the Past Five Decades in Shaanxi Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 02
Page number:
107-112
Column:
Public date:
2015-04-28
- Title:
- Analysis of Spatiotemporal Variation Characteristics of Precipitation in the Past Five Decades in Shaanxi Province
- CLC:
- S161.6
- DOI:
- -
- Abstract:
- This study used annual precipitation data collected from 39 sites in recent 50 years in neighboring Shaanxi Province and Shaanxi Province to analyze the precipitation change trend and its spatiotemporal distribution and variation characteristics of Shaanxi Province in recent 50 years using the Mann-Kendall nonparametric tests, the cumulative departure method and GIS interpolation. The results showed that: 1) with respect to precipitation in the recent 50 years of Shaanxi, it had obvious fluctuation, and it presented ‘increase—decrease—increase—decrease—increase’ band form, as with the overall trend, the precipitation sequence presented a decreasing trend, and the fitting reduction rate of precipitation was 14.59 mm/10 a; 2) in recent 50 years, precipitation in Shaanxi appeared two peaks in 1967 and 1985, respectively; 3) the distribution and variation of precipitation and precipitation isoline in Shaanxi existed obvious differentiation from the north to the south; less precipitation occurred in the north and more in the south, in northern Shaanxi, the precipitation isoline was sparse and dense in southern Shaanxi and Guanzhong; 4) due to the mutual influence of the monsoon and terrain, the precipitation also is different in the longitude direction in Shaanxi Province, in northern Shaanxi, the precipitation is more in the east of Shaanxi and less in the west; in Guanzhong and southern Shaanxi, it is more in the west and less in the east.
- References:
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1900-01-01