Over the past 50 years, temperature in the Northwest China p resented a significant rising trend, while p recip itation change was different in different p lace. Warming and drying trend is evident in the whole Northwest China, but the local appearswarming and wetting phenomenon. With the global warming, glaciers retreat and snow line rises, permafrost melts, wetlands degradation, lakes shrink, river flows decrease, water resource becomes scarcer, and eco - environmental degradation. According to IPCC forecast results, the climate warming trend in this region in the future will be more p ronounced. The countermeasures to p rotect the ecological environment, imp rove the comp rehensive climate change monitoring system, launch specific research on the key regional climate changep rocesses, and other suggestionswere put forward.

 Based on the climatic; data of  ten years(1991一2000)China are analyzed.  The result show that the hail distribution is the spatial一temporal distribution(harac;teristi<、of hail in Northwest in belt patterns and the main hail zone is in the middle part of Tibetan plateau Qilian mountain and the west part of Tianshan mountain the more frequent、entre is in the south side along the east一WPSt mountains than that and the east side along the north一、outh mountains } the date o<(urrin} hails in mOthe south part of the plateau and the hail duration is lone but the hail days are the north part of Tibetan Plateau is earlier fewer than that in the south part of the plateau from the (urves of dec;adal and pentad evolution of hail days

Using the monthly soil temperature date in the depth of 3. 2m during 1980一2000 in 141 stations and theprecipitation date duri ng 1961一2000 in 160 stations ,through the earth一atmosphere chart method ,thepaper analyzed"geothermal vortexes"in Northwest China .The results show that "geothermal vortexes”in Northwest China have an average horizontal scale of 560km or so and a life span 4. 3 months approximately.  Moreover .the monthly precipitation totals are more than normal is well corre}onding to the "geothermal vortexes”,which strongly supports the conceptual model indicating the couple between the earth and the atmo}here proposed in reference[1][2].