The Study On Extreme Weather Events And The Relationship With Regional Climate In Inner Mongolia

With the global warming, the inter-decadal signal becomes much more obvious. Extreme climate events and inter-decadal signal climate change have become one of the most important contents of IPCC AR5. The extreme climate event, a quite complicated system, including disastrous climate events, like extreme rainfall event, extreme climate event and etc. have become hot-spot issues in nowadays academe and international society. The development and evolvement of the extreme climate events are well-connected with the global regional climate. The frequency of extreme climate events which under the impact of global climate change, accounted for more than 70% of natural disasters just in China.So far, the extreme climate of Inner Mongolia that was influenced by nature and human being has been researched, while there were little about the regional climate and the extreme climate. Therefore, by using Causality test of Granger and the other methods, this paper is going to discuss the correlativity between the extreme temperature and extreme rainfall event, and the regional climate change. The following shows the result of my research:1. In terms of time, the index of Inner Mongolian extreme climate shows an inhomogeneous variation tendency; while in space, the law of variation is quite obvious.2. From the angle of correlativity, the Inner Mongolian annual precipitation is the reason of the SU with the lag phase of four years (p<0.01), presents as a negative correlation; the R95P is the lag phase of three years of the SU which also presents as a negative correlation; the RX1D is the lag phase of one years of the SU (p<0.01), presenting a negative correlation; the annual average temperature is the reason of the SU whose lag phase is three years and the reason of the FD with the lag phase of one year, and the significance of both is over 0.01, in which the SU passes the test of dependency.3. The SU is the reason of TXID and FD whose both lag phase is one year (p>0.01), and all passes the test of dependency; FD is the reason of SU’s lag phase of two years (p>0.01), with the passing of the test of dependency.