| Weather and Climate |
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| Spatio-temporal Characteristics of Potential Climate Productivity of Grassland and Its Responses to Climate Change in Xinjiang, China |
| ZHANG Rui, LIU Pu-xing, ZHANG Ke-xin |
| College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China |
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Abstract Based on observed data of monthly temperature and precipitation of 52 weather stations from 1959 to 2008 in Xinjiang, the spatial and temporal characteristics of potential climate productivity of grassland were analyzed with Miami and Thornthwaite Memorial models, linear trend analysis, and inverse distance weighted interpolation. Research results indicated that the grassland potential productivity induced by temperature, precipitation, evapotranspiration appeared a significant increase trend in recent 50 years in Xinjiang. The grassland potential productivity of four seasons and growing season also showed a linear increase, but such an increase was stronger in summer and in growing season than in the other seasons. The grassland potential productivity in Northern Xinjiang was more than in Southern Xinjiang as well as its increase amplitude, this change showed increasing from south to north, which is consistent to multi-year average precipitation. Moisture condition is a dominant factor for the grassland potential productivity in Xinjiang. According to a binary linear regression equation, the grassland potential productivity increase(or decrease) 17.309 kg/(hm2·a) when temperature increase(or decrease) 1 ℃per year, and the variation value for precipitation is 24.392 kg/(hm2·a).
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Received: 16 April 2011
Published: 20 January 2012
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2012, Vol. 32 
