Abstract:

Global climate change affects not only the environment human live in, but also affects the development of word economic and social progress.The IPCC published its fourth report (AR4) in 2007 and said that in the last 100 years the surface temperature of the global had increased by 056-092 equally.China is one of the countries where the meteorological disasters are the most severe in the world.All kinds of extreme climate events have made great loss to our country.With the background of global climate warming,more and more extreme climate events have happened.It is necessary to monitor the climate in our country,pay more attention to the anomaly characteristics and analysis of all kinds of weather events.Relevant works may provide some references for future disaster prevention and mitigation measures,and also for a comprehensive assessment of China climate change.Based on 468 meteorological stations data,the variation characteristics of climatic factors in China during 1961-2010 were analyzed,using  linear regression,Inverse Distance Weighted interpolation method,Morlet wavelet and MannKendall methods.The results show that temperature including annual mean temperature,minimum temperature,maximum temperature,annual extreme minimum temperature and annual extreme maximum temperature displayed a significant increasing trend.The difference between annual mean minimum and maximum temperatures (annual extreme temperatures) as well as sunshine hours exhibited a significantly decreasing trend.Significant cycles in the range of 14 a-6 a were found to exist for  annual mean temperature,minimum temperature,maximum temperature and annual extreme maximum temperature,while cycles in the range of 25 a-26 a were found to exist for average annual precipitation,annual extreme minimum temperature,mean annual temperature difference,annual extreme temperature difference and average annual sunshine hours.Significant climatic changes were found in several years such as 1996,1981,1997,1975,1983 and 1982.Similar cycles and abrupt years suggest possible linkages between those climate factors