Analysis on the Climatic Variation Characteristics in the Upper and Middle Yangtze River ---------a case study of Xingwen County,Yibin City

摘要

Begin the abstract two lines below author names and addresses. The abstract summarizes key findings in the paper. It is a paragraph of 200 words or less. For the keywords, select up to 8 key terms for a search on your manuscript's subject Using the yearly average rainfall and annual average temperature in Xingwen county during the period of 1959~2007, the correlation on average annual rainfall and temperature and the trend of change are analyzed by correlation analysis and grey sequence forecast.The results show that there was a negative correlation between average annual rainfall and temperature.The prediction results for future tendency show that the annual average rainfall will still keep downtrend, the annual average temperature will keep rising trend.The trend of change is mainly controlled by the global warming and the large-scale climate variations, and the results indicate that the trend of change is basically consistent with the trend of the Yangtze river basin..