[1] Schuur EAG, Bockheim J, Canadell JG, et al. Vulnerability of permafrost carbon to climate change: Implications for the global carbon cycle. Bioscience, 2008, 58: 701-714 [2] Li X, Cheng GD, Jin HJ, et al. Cryospheric change in China. Global and Planetary Change, 2008, 62: 210-218 [3] Li X, Cheng GD. A GIS-aided response model of high-altitude permafrost to global change. Science in China Series D: Earth Sciences, 1999, 42: 72-79 [4] Guglielmin M, Ellis Evans CJ, Cannone N. Active layer thermal regime under different vegetation conditions in permafrost areas: A case study at Signy Island (Maritime Antarctica). Geoderma, 2008, 144: 73-85 [5] Cheng GD, Jin HJ. Permafrost and groundwater on the Qinghai-Tibet Plateau and in northeast China. Hydrogeology Journal, 2013, 21: 5-23 [6] Tutubalina OV, Rees WG. Vegetation degradation in a permafrost region as seen from space: Norils'k (1961-1999). Cold Regions Science and Technology, 2001, 32: 191-203 [7] Yang Z, Gao J, Zhou C, et al. Spatio-temporal changes of NDVI and its relation with climatic variables in the source regions of the Yangtze and Yellow rivers. Journal of Geographical Sciences, 2011, 21: 979-993 [8] Mao D, Luo L, Wang Z, et al. Variations in net primary productivity and its relationships with warming climate in the permafrost zone of the Tibetan Plateau. Journal of Geographical Sciences, 2015, 25: 967-977 [9] Hudson JMG, Henry GHR. Increased plant biomass in a High Arctic heath community from 1981 to 2008. Ecology, 2009, 90: 2657-2663 [10] Sun ZG, Wang QX, Xiao QG, et al. Diverse responses of remotely sensed grassland phenology to interannual climate variability over frozen ground regions in Mongolia. Remote Sensing, 2015, 7: 360-377 [11] Walker MD, Wahren CH, Hollister RD, et al. Plant community responses to experimental warming across the tundra biome. Proceedings of the National Academy of Sciences of the United States of America, 2006, 103: 1342-1346 [12] Wei Z, Jin HJ, Zhang JM, et al. Prediction of permafrost changes in Northeastern China under a changing climate. Science China Earth Sciences, 2011, 54: 924-935 [13] Jin HJ, Li SX, Cheng GD, et al. Permafrost and clima-tic change in China. Global and Planetary Change, 2000, 26: 387-404 [14] Jin HJ, Yu QH, Lii LZ, et al. Degradation of permafrost in the Xing’anling Mountains, northeastern China. Permafrost and Periglacial Processes, 2007, 18: 245-258 [15] Sun J, Li XZ, Wang XW, et al. Plant species distribution in permafrost wetlands of the great Hing’an Mountain Valleys and its response to global climate change. Journal of Earth Science, 2010, 21: 266-270 [16] Guo J-T (郭金停), Han F-L (韩风林), Bu R-C (布仁仓) , et al. Ecological characteristics of plants and its responses to changes in the permafrost depths of the north slope of the Great Khingan Mountain valley of Northeast China. Acta Ecologica Sinica (生态学报), 2016, 36(21): 1-8 (in Chinese) [17] Piao SL, Fang JY, Ji W, et al. Variation in a satellite-based vegetation index in relation to climate in China. Journal of Vegetation Science, 2004, 15: 219-226 [18] Guo D-X (郭东信), Wang S-L (王绍令), Lu G-W (鲁国威), et al. Regionalization of permafrost in the Da and Xiao Xing’anling mountains in northeastern China. Journal of Glaciology and Geocryology (冰川冻土), 1981, 3(3): 1-9 (in Chinese) [19] Sun J (孙 菊), Li X-Z (李秀珍), Hu Y-M (胡远满), et al. Classification, species diversity, and species distribution gradient of permafrost wetland plant communities in Great Xing’an Mountains valleys of Northeast China. Chinese Journal of Applied Ecology (应用生态学报), 2010, 20(9): 2049-2056 (in Chinese) [20] Mao D-H (毛德华), Wang Z-M (王宗明), Luo L (罗 玲), et al. Dynamic changes of vegetation net primary productivity in permafrost zone of Northeast China in 1982-2009 in response to global change. Chinese Journal of Applied Ecology (应用生态学报), 2012, 23(6): 1511-1519 (in Chinese) [21] Pedelty J, Devadiga S, Masuoka E, et al. Generating a long-term land data record from the AVHRR and MODIS Instruments. Proceedings of the 2007 IEEE International Geoscience and Remote Sensing Symposium, Barcelona, Spain, 2007: 23-28 [22] Fensholt R, Proud SR. Evaluation of earth observation based global long term vegetation trends: Comparing GIMMS and MODIS global NDVI time series. Remote Sensing of Environment, 2012, 119: 131-147 [23] Holben BN. Characteristics of maximum-value composite images from temporal AVHRR data. International Journal of Remote Sensing, 1986, 7: 1417-1434 [24] Huete A, Justice C, Van Leeuwen W. MODIS Vegetation Index (MOD13). Algorithm Theoretical Basis Document [EB/OL]. (1999-09-01) [2016-08-02]. http://xueshu.baidu.com/s?wd=paperuri%3A%28cbb02c919c85b3e45ccfade81ca96235%29&filter=sc_long_sign&tn=SE_xueshusource_2kduw22v&sc_vurl=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.549.4221%26rep%3Drep1%26type%3Dpdf&ie=utf-8&sc_us=8311124432299970942 [25] Mao D, Wang Z, Luo L, et al. Integrating AVHRR and MODIS data to monitor NDVI changes and their relationships with climatic parameters in Northeast China. International Journal of Applied Earth Observation and Geoinformation, 2012, 18: 528-536 [26] Stow D, Daeschner S, Hope A, et al. Variability of the seasonally integrated normalized difference vegetation index across the north slope of Alaska in the 1990s. International Journal of Remote Sensing, 2003, 24: 1111-1117 [27] Herrmann SM, Anyamba A, Tucker CJ. Recent trends in vegetation dynamics in the African Sahel and their relationship to climate. Global Environmental Change, 2005, 15: 394-404 [28] Jeong SJ, Ho CH, Gim HJ, et al. Phenology shifts at start vs. end of growing season in temperate vegetation over the Northern Hemisphere for the period 1982-2008. Global Change Biology, 2011, 17: 2385-2399 [29] Piao SL, Fang JY, Zhou LM, et al. Interannual variations of monthly and seasonal normalized difference vegetation index (NDVI) in China from 1982 to 1999. Journal of Geophysical Research: Atmospheres, 2003, 108: 13 [30] Tucker CJ, Slayback DA, Pinzon JE, et al. Higher northern latitude normalized difference vegetation index and growing season trends from 1982 to 1999. International Journal of Biometeorology, 2001, 45: 184-190 [31] Zhou L, Tucker CJ, Kaufmann RK, et al. Variations in northern vegetation activity inferred from satellite data of vegetation index during 1981 to 1999. Journal of Geophysical Research: Atmospheres, 2001, 106: 20069-20083 [32] Myneni RB, Keeling CD, Tucker CJ, et al. Increased plant growth in the northern high latitudes from 1981 to 1991. Nature, 1997, 386: 698-702 [33] Wang X, Yi S, Wu Q, et al. The role of permafrost and soil water in distribution of alpine grassland and its NDVI dynamics on the Qinghai-Tibetan Plateau. Global and Planetary Change, 2016, 147: 40-53 [34] Piao SL, Wang XH, Ciais P, et al. Changes in satellite-derived vegetation growth trend in temperate and boreal Eurasia from 1982 to 2006. Global Change Biology, 2011, 17: 3228-3239 [35] Goetz SJ, Bunn AG, Fiske GJ, et al. Satellite-observed photosynthetic trends across boreal North America associated with climate and fire disturbance. Proceedings of the National Academy of Sciences of the United States of America, 2005, 102: 13521-13525 [36] Piao SL, Ciais P, Huang Y, et al. The impacts of climate change on water resources and agriculture in China. Nature, 2010, 467: 43-51 [37] Song Y, Ma MG. A statistical analysis of the relationship between climatic factors and the normalized difference vegetation index in China. International Journal of Remote Sensing, 2011, 32: 3947-3965 [38] Myneni RB, Dong J, Tucker CJ, et al. A large carbon sink in the woody biomass of Northern forests. Proceedings of the National Academy of Sciences of the United States of America, 2001, 98: 14784-14789 [39] Fang JY, Piao SL, Field CB, et al. Increasing net primary production in China from 1982 to 1999. Frontiers in Ecology and the Environment, 2003, 1: 293-297 [40] Lotsch A, Friedl MA, Anderson BT, et al. Response of terrestrial ecosystems to recent Northern Hemispheric drought. Geophysical Research Letters, 2005, 32: 1-5 [41] Piao S, Nan H, Huntingford C, et al. Evidence for a weakening relationship between interannual temperature variability and northern vegetation activity. Nature Communications, 2014, 5: 5018 [42] Liu X, Zhu X, Li S, et al. Changes in growing season vegetation and their associated driving forces in China during 2001-2012. Remote Sensing, 2015, 7: 15517-15535 [43] Los SO, Collatz GJ, Bounoua L, et al. Global interannual variations in sea surface temperature and land surface vegetation, air temperature, and precipitation. Journal of Climate, 2001, 14: 1535-1549 [44] Xu L, Myneni RB, Chapin FS, Iii, et al. Temperature and vegetation seasonality diminishment over northern lands. Nature Climate Change, 2013, 3: 581-586 [45] Sun W, Song X, Mu X, et al. Spatiotemporal vegetation cover variations associated with climate change and ecological restoration in the Loess Plateau. Agricultural and Forest Meteorology, 2015, 209: 87-99 [46] Fang JY, Yoda K. Climate and vegetation in China III water balance and distribution of vegetation. Ecological Research, 1990, 5: 9-23 [47] Kelley AM, Epstein HE, Virginia UO, et al. Role of vegetation and climate in permafrost active layer depth in Arctic Tundra of Northern Alaska and Canada. Journal of Glaciology & Geocryology, 2004, 26: 269-274 [48] Chen H, Zhu Q, Peng C, et al. The impacts of climate change and human activities on biogeochemical cycles on the Qinghai-Tibetan Plateau. Global Change Biology, 2013, 19: 2940-2955 [49] Wang SL, Jin HJ, Li SX, et al. Permafrost degradation on the Qinghai-Tibet Plateau and its environmental impacts. Permafrost and Periglacial Processes, 2000, 11: 43-53 [50] Wang Z, Yang G, Yi S, et al. Different response of vegetation to permafrost change in semi-arid and semi-humid regions in Qinghai-Tibetan Plateau. Environmental Earth Sciences, 2012, 66: 985-991 [51] Schuur EAG, Crummer KG, Vogel JG, et al. Plant species composition and productivity following permafrost thaw and thermokarst in Alaskan tundra. Ecosystems, 2007, 10: 280-292 [52] Jonasson S, Michelsen A, Schmidt IK, et al. Responses in microbes and plants to changed temperature, nutrient, and light regimes in the arctic. Ecology, 1999, 80: 1828-1843 [53] Mack MC, Schuur EAG, Bret-Harte MS, et al. Ecosystem carbon storage in arctic tundra reduced by long-term nutrient fertilization. Nature, 2004, 431: 440-443 [54] Peng X, Wu Q, Tian M. The effect of groundwater table lowering on ecological environment in the headwaters for the Yellow River. Journal of Glaciology and Geocryology, 2003, 25: 667-671 [55] Zhang S, Wang Y, Zhao Y, et al. Permafrost degradation and its environmental sequent in the source regions of the Yellow River. Journal of Glaciology and Geocryo-logy, 2004, 26: 1-6 |