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[1]LIU Hongzhi,XIAO Changlai,ZHANG Yanxiang,et al.Analysis on Temporal Characteristics and Trend of Precipitation over the Past 50 Years in Inner Mongolia[J].Research of Soil and Water Conservation,2015,22(02):74-78,83.

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Analysis on Temporal Characteristics and Trend of Precipitation over the Past 50 Years in Inner Mongolia

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 02 Page number: 74-78,83 Column: Public date: 2015-04-28

Title:: Analysis on Temporal Characteristics and Trend of Precipitation over the Past 50 Years in Inner Mongolia

Author(s):: LIU Hongzhi^1,2, XIAO Changlai^1,2, ZHANG Yanxiang^1,2, LIANG Xiujuan^1,2; 1. Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, China;
2. College of Environment and Resources, Jilin University, Changchun 130021, China

Keywords:: precipitation; evolution characteristic; trend analysis; Inner Mongolia

CLC:: P467

DOI:: -

Abstract:: Annual precipitation data of Inner Mongolia from 46 meteorological stations through 1960 to 2011 were used to analyze the temporal distribution characteristics of precipitation. The trend of the precipitation was analyzed using linear trend calculation, moving average, cumulative anomaly, harmonic analysis, Mann-Kendall method, slide t test. The results showed that: 1) it was no significant for the trend of precipitation in 52 years in Inner Mongolia. Precipitations presented observably increasing trend before 1998, and declined after 13 years in east, central and regional area; 2) precipitation mainly concentrated in the summer, accounting for 60%～70%, precipitation gradually reduced from the east to the west, but followed the similar seasonal distribution rule; 3) interdecadal and interannual precipitations presented the decreasing trend, there were obvious interdecadal changes in eastern, central and regional areas, drought and flood alternative cycle was 15 years or so in the western area; 4) abrupt change year of average precipitation in east and regional area in Inner Mongolia was the year of 1999, the trend of precipitation shifted from increase to decrease. no abrupt change was found and no significant change was observed in the west, there was no abrupt change in the western and central areas.

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