Allen R G, Pereira L S, Raes D et al., 1998. Crop Evapotranspiration: Guidelines for Computing Crop Water Requirements. Rome: United Nations Food and Agriculture Organization.
Cui Linli, Shi Jun, Yang Yinming et al., 2009. Ten-day response of vegetation NDVI to the variations of temperature and precipitation in eastern China. Acta Geographica Sinica, 64(7): 850-860. (in Chinese)
Fan Jiangwen, Shao Quanqin, Liu Jiyuan et al., 2010. Assessment of effects of climate change and grazing activity on grassland yield in the Three Rivers Headwaters Region of Qinghai-Tibet Plateau. China. Environmental Monitoring and Assessment, 170: 571-584.
Fang Jingyun, Piao Shilong, 2003. Vegetation of China invigorated in last 20 years. Science in China (Series C), 33(6): 554-565. (in Chinese)
IPCC, 2007. Summary for Policymakers of Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK: Cambridge University Press.
Jiang Tianhan, Deng liantang, 2004. Some Problems in estimating a Hurst Exponent: A case study of applications to climatic change. Scientia Geographica Sinica, 24(2): 177-182. (in Chinese)
Li Huixia, Liu Guohua, Fu Bojie, 2011. Response of vegetation to climate change and human activity based on NDVI in the Three-River Headwaters region. Acta Ecologica Sinica, 31(19): 5495-5504. (in Chinese)
Li Shanshan, Zhang Mingjun, Wang Baolong et al., 2012. Spatial difference of precipitation variation in Three-River Headwaters Region of China in recent 51 years. Chinese Journal of Ecology, 31(10): 2635-2643. (in Chinese)
Li Shuangshuang, Yan Junping, Liu Xinyan, 2013. Response of vegetation restoration to climate change and human activities and its spatial-temporal characteristics in Shaanxi-Gansu-Ningxia Region. Journal of Geographical Sciences, 23(1): 98-112.
Liu Jiyuan, Xu Xinliang, Shao Quanqin, 2008. The spatial and temporal characteristics of grassland degradation in the Three-River Headwaters Region in Qinghai Province. Acta Geographica Sinica, 63(4): 364-376. (in Chinese)
Liu Xianfeng, Ren Zhiyuan, 2012. Vegetation coverage change and its relationship with climate factors in Northwest China. Scientia Agricultura Sinica, 45(10): 1954-1963. (in Chinese)
Myneni R B, Keeling C D, Tucker C J et al., 1997. Increased plant growth in the northern high latitudes from 1981 to 1991. Nature, 386(6626): 698-702.
Piao Shilong, Mohammat A, Fang Jingyun et al., 2006. NDVI-based increase in growth of temperate grasslands and its responses to climate changes in China. Global Environmental Change, 16(14): 340-348.
Quan Shuan, Fu Yang, PAN F F, 2010. Climate change trend in growing season and the response to grassland in the Three-River Headwaters. Science in China (Series D), 40(10): 1439-1445. (in Chinese)
Shao Quanqin, Zhao Zhiping, Liu Jiyuan et al., 2010. The characteristics of land cover and macroscopical ecology changes in the source region of three-rivers on Qinghai-Tibet Plateau during last 30 years. Geographical Research, 29(8): 1439-1451. (in Chinese)
Song Dongmei, Zhang Qian, Yang Xiuchun et al., 2011. Spatial and temporal characteristics of MODIS vegetation index in the source region of three rivers on Qinghai-Tibet Plateau in China. Geographical Research, 30(11): 2067-2075. (in Chinese)
Song Yi, Ma Mingguo, 2008. Variation of AVHRR NDVI and its relationship with climate in Chinese arid and cold regions. Journal of Remote Sensing, 12(3): 499-506. (in Chinese)
Xin Zhongbao, Xu Jiongxin, Zheng Wei, 2007. Response of vegetation cover change to climate change and human activities in Loess Plateau. Science in China: Series D, 37(11): 1504-1514. (in Chinese)
Xu Jianhua, 2002. Mathematical Method in Modern Geography. 2nd ed. Beijing: Higher Education Press: 37-41.
Xu Weixin, Gu Song, Su Wenjiang et al., 2012. Spatial pattern and its variations of aridity/humidity during 1971-2010 in Three-River Source Region on the Qinghai-Tibet Plateau. Arid Land Geography, 35(1): 46-55. (in Chinese)
Yi Xiangsheng, Yin Yanyu, Li Guosheng et al., 2011. Temperature variation in recent 50 years in the Three-River Headwaters Region of Qinghai Province. Acta Geographica Sinica, 66(11): 1451-1465. (in Chinese)
Yin Yunhe, Wu Shaohong, Chen Gang et al., 2010. Attribution analyses of potential evapotranspiration changes in China since the 1960s. Theoretical Applied Climatology, 101: 19-28.
Zhang F, Tiyip T, Ding J L et al., 2013. Vegetation fractional coverage change in a typical oasis region in Tarim River Watershed based on remote sensing. Journal of Arid Land, 5(1): 89-101.
Zhang Geli, Xu Xingliang, Zhou Caiping et al., 2011. Responses of vegetation changes to climatic variations in Hulun Buir Grassland in past 30 years. Acta Geographica Sinica, 66(1): 47-58. (in Chinese)
Zhang Chong, Ren Zhiyuan, 2011. Temporal and spatial differences and its trends in vegetation cover change over the Loess Plateau. Resources Science, 33(11): 2143-2149. (in Chinese)
Zhao Xia, Tan Kun, Zhao Shuqing et al., 2011. Changing climate affects vegetation growth in the arid region of the northwestern China. Journal of Arid Environments, 75: 946-952.
Zhang Yili, Ding Mingjun, Zhang Wei et al., 2007. Spatial characteristic of vegetation change in the source regions of the Yangtze River, Yellow River and Lancang River in China. Geographical Research, 26(3): 500-507. (in Chinese)