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[1]DAI Haiyan,DU Wala,WANG Xiaojiang,et al.Climate Type and Net Primary Productivity Evolution Process in Inner Mongolia During 1981-2010[J].Research of Soil and Water Conservation,2018,25(04):222-226.

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Climate Type and Net Primary Productivity Evolution Process in Inner Mongolia During 1981-2010

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 04 Page number: 222-226 Column: Public date: 2018-06-13

Title:: Climate Type and Net Primary Productivity Evolution Process in Inner Mongolia During 1981-2010

Author(s):: DAI Haiyan¹, DU Wala¹, WANG Xiaojiang², LI Dan¹, SU Dongyu³; 1. Inner Mongolia Ecology and Agricultural Meteorology Centre, Hohhot 010051, China;
2. Inner Mongolia Academy of Forestry Science, Hohhot 010010, China;
3. Inner Mongolia Bureau of Meteorology, Hohhot 010051, China

Keywords:: Inner Mongolia; climatic change; humidity index; climate type; net primary productivity

CLC:: P462;Q948

DOI:: -

Abstract:: In order to better serve the ecological construction in Inner Mongolia, provide the evolution process of regional climate background, we used humidity index method to analyze the types of dry and wet climate change in Inner Mongolia during 1981—2010. The results show that half arid area, arid region and subhumid area or humid area were 343 090 km², 388 035 km² and 411 819 km², respectively, in Inner Mongolia in recent 30 years. Half arid area+arid region+extremely arid areas during 2001—2010 were 1.3 times of those during 1991—2000, subhumid area+humid area decreased by 0.5 times; comparison of dry and wet climate type with historical precipitation distribution shows that arid region and below were close to the area with more than 200 mm of precipitation; humid region were close to area with more than 400 mm of precipitation in northeast of Inner Mongolia; the most widespread half arid areas were affected by the temperature and precipitation, which had nothing to do with the rainfall distribution; correlation analysis indicated that the temperature presented the significantly increasing trend, and precipitation decline resulted from the climate fluctuation in nearly 30 years; correlation coefficient of regional net primary productivity and precipitation is 0.930 0, and correlation coefficient of regional net primary productivity and temperature is only -0.270 0; the interdecadal changes indicated that NPP significantly decreased during 2001—2010, presenting the stepped down from northwest to southeast, the area greatly influenced mainly distributed in the typical steppe and meadow steppe in western of Hulunbuir City, at the same time, NPP significantly decreased in Chifeng City and Tongliao City in recent 20 years, NPP significantly decreased in eastern district area, NPP fluctuated in the western area.

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