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| 1 | RIVER DISCHARGE CHANGES IN THE QINGHAI-TIBET PLATEAU显示文摘Annual mean discharge data of the five large rivers in the exorheic region of the Qing- hai-Tibet Plateau from 1956 to 2000 are analyzed for trends with the Mann-Kendall nonparametric trend test. The results reveal that though in general no in- creasing trends exist in the total river discharges, significant regional differences of river discharge ex- ist, reflecting the decreasing trends of discharge in the Yellow River and the Tongtian River (upper Changjiang River), an increasing trend in Yalong River, and inverted change in the Lancang River and Yarlung Zangbo River. Based on analyses of the seasonal discharge, it is found that climatic change had a significant effect on the seasonal variation of river discharge in the Qinghai-Tibet Plateau. In spring (from March to May) the discharge increased signifi- cantly, especially in the source area of the Yellow River. Together with the analyses on data of the mean temperature in the Northern Hemisphere and climatic data within the river basins, the relationship between discharges and mean temperature of the Northern Hemisphere is explored, which indicates that there is no increase in the stream discharge in the Qinghai-Tibet Plateau with global warming. It is probably the increasing evaporation, caused by rising temperature that offsets the hydrological effect of increasing precipitation. | CAO Jianting QIN Dahe KANG Ersi LI Yuanyuan | 2006 | Chinese Science Bulletin2006，51，5： | 9 |
| 2 | Estimation of tree transpiration and response of tree conductance to meteorological variables in desert-oasis system of Northwest China显示文摘Transpirations of three dominated tree species, namely Mongol Scotch Pine (Pinus sylvestris var. mongolica Litvin), White elm (Ulmus pumila) and Gansu Poplar (Populus gansuensis Wang et Yang) in oasis shelter forest (Linze site) and of two dominated tree species,namely Euphrates Poplar (Populus euphratica Oliv.) and Russia olive (Elaeagnus angustifolia Linn.) in lowland desert (Erjinaqi site) have been estimated using measured sapflow in summer,autumn and winter, 2002 and in spring, 2003. An ENVIS System was used for each site to measure microclimate variables, soil moisture and sapflow every half an hour, and the study time scale is one day. In the 104 days of observation during the growing season at the Linze site, the average daily sapflow of Gansu Poplar is 9.93L·d-1,and the average transpiration per unit leaf area is 1.99mm·d-1.For White elm tree,the daily average sapflow is 4.08L·d-1,while the daily average transpiration per unit leaf area is 0.49mm·d-1.The values for Mongol Scotch Pine are 3.91L·d-1 and 0.25mm·d-1,respectively.In the total 73 days of observation during the growing season at the Erjinaqi site, the daily average sapflows of Russia olive and Euphrates Poplar are 12.1 and 20.97L·d-1,respectively,and the average transpirations per unit leaf area are 0.22 amd 0.31mm·d-1,respectively.In the observation period of the growing season,tree conductances of Mongol Scotch Pine, White elm, Gansu Poplar or Russia olive show an exponential relationship with the daily average air temperature or vapour pressure deficit, but the relationship is not so obvious between tree conductance and global radiation. The transpiration process of each tree species is affected by all the observed four environmental variables. The response of tree conductance to different climatic factors changes with tree species. The effect of the same factor to the same tree species is also variable in different growing stages. The sapflow of every tree species is relatively large in later spring to early summer, and low in summer, and then reaches its largest value in later September. In the mid-November, the sapflow is relatively large, especially the deciduous tree species. This may be characteristic of the tree species in Arid Regions of Northwest China. | CHEN Rensheng KANG Ersi ZHANG Zhihui ZHAO Wenzhi SONG Kechao ZHANG Jishi LAN Yongchao | 2004 | Science China Earth Sciences2004，47，z1： | 5 |
| 3 | The relationship between ENSO cycle and temperature,precipitation and runoff in the Qilian mountain area显示文摘El Nino and La Nina are the events concerned internationally. The corresponding relationship between El Nino events, temperature, precipitation and runoff in the Qilian mountain area are analyzed according to the date from the weather and the hydrometric stations in the area, the results show that effects of El Nino events to temperature, precipitation and runoff are different in the different time and zones. When El Nino occurs, temperature rises, but precipitation and runoff decrease in the whole Qilian mountain area, especially in the east and middle parts of the area. Temperature rises, precipitation and runoff still decrease in the eastern Qilian mountain area in the next year El Nino occurring, but decrease extent is fewer. There are not obvious relationship between temperature, precipitation and runoff with El Nino events in the western Qilian mountain area. | LAN Yongchao,DING Yongjian,KANG Ersi,ZHANG Jishi(Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China) | 2003 | Journal of Geographical Sciences2003，13，3： | 2 |
| 4 | Cryospheric change in China显示文摘 | Xin Li Guodong Cheng Huijun Jin Ersi Kang Tao Che Rui Jin Lizong Wu Zhuotong Nan Jian Wang Yongping Shen | 2008 | Global and Planetary Change2008，，3： | 1 |
| 5 | Recent and fu- ture climate change in Northwest China显示文摘 | Shi Yafeng Shen Yongping Kang Ersi etal | 2007 | Climate Change2007，80，： | 1 |
| 6 | Observation and estimation of evaporateion from the ground surface of the cryosphere in estern Asia显示文摘 | Kang Ersi Ohata T | 2003 | Hydrological Processes2003，17，： | 1 |
| 7 | Recent and future climate change in northwest China显示文摘 | SHI Y F SHEN Y P KANG ERSI | 2007 | Climatic Change2007，80，34： | 1 |
| 8 | An hourly solar radiation model under actual weather and terrain conditions: A case study in Heihe river basin 显示文摘 | Chen Rensheng Lu Shihua Kang Ersi | 2007 | Energy2007，32，： | 1 |
| 9 | Variance tendency in the 50-year annual meteorological and hydrological series of Hexi region of Gansu Province 显示文摘 | Chen Rensheng Kang Ersi Yang Jianping | 2002 | Journal of Lanzhou University (Natural Sciences)2002，38，2： | 1 |
| 10 | Validation of five global radiation models with measured daily data in China显示文摘 | Chen Rensheng Kang Ersi Yang Jianping | 2004 | Energy Conversion and Management2004，45，： | 1 |
| 11 | An hourly solar radiation model under actual weather and terrain conditions : A case study in Heihe river basin 显示文摘 | Chen Rensheng Lu Shihua Kang Ersi | 2007 | Energy2007，32，： | 1 |
| 12 | Cold regions in China显示文摘 | Chen Rensheng Kang Ersi Ji Xibin | | 0，，02： | 1 |
| 13 | Recent and Future Climate Change in Northwest China显示文摘 | Yafeng Shi Yongping Shen Ersi Kang Dongliang Li Yongjian Ding Guowei Zhang Ruji Hu | 2007 | Climatic Change (-)2007，，3： | 1 |
| 14 | An hourly solar radiation model under actual weather and terrain conditions: Acase study in Heihe River Basin显示文摘 | Chen Rensheng Lu Shihua Kang Ersi | 2007 | Energy2007，32，： | 1 |
| 15 | Response of the snowmelt and glacier runoff to the climate warming-up in the last 40 years in Xinjiang Autonomous Region, China显示文摘 | Baisheng Ye Yongjian Ding Ersi Kang Gang Li Tianding Han | 1999 | Science in China Series D: Earth Sciences1999，，1： | 1 |
| 16 | Study on the glacier variation and its runoff responses in the arid region of Northwest China显示文摘 | Chaohai Liu Ersi Kang Shiyin Liu Jianming Chen Zongxiang Liu | 1999 | Science in China Series D: Earth Sciences1999，，1： | 1 |
| 17 | A model for simulating the response of runoff from the mountainous watersheds of inland river basins in the arid area of northwest China to climatic changes显示文摘 | Ersi Kang Guodong Cheng Yongchao Lan Huijun Jin | 1999 | Science in China Series D: Earth Sciences1999，，1： | 1 |
| 18 | Study on the glacier variation and its runoff responses in the arid region of Northwest China显示文摘 | LIU Chaohai KANG Ersi LIU Shiyin | 1999 | SCIENCE IN CHINA1999，，： | 1 |
| 19 | Recent ad future climate change in northwest China显示文摘 | Shi Yafeng Shen Yongping Kang Ersi | 2007 | Climatic Change2007，80，： | 1 |
| 20 | Runoff fore- cast model for inflow to the Longyangxia Reservoir in the up per Yellow River basin during spring 显示文摘 | Lan Yongehao Kang Ersi Ma Quanjie | 1999 | Journal of Glaciol- ogy and Geocryology1999，21，4： | 1 |
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