The Climatic Change During The Holocene In Southern Weihe River Of The Guanzhong Area

Nowdays,the problem of the global environmental degradation,is closely interrelated to human's life.However,the modern environmental variation is the nature environmental extension of the Quaternary Holocene Period,which is related to the environment of the Holocene.Therefore,the method of studying the rule of the environmental variation in Quaternary for forecasting the environment in the future is applicated universally.The Southern Weihe River of the Guanzhong is located in Loess Highlands,the Holocene loess-alaeosoil,which has complete growth,stable position and distinct boundary,completely conserves the environmental evolution information from the Holocene.On the basis of systemic analysis of the Holocene loess-alaeosoil,the issue researched climate substitution target of the loess section,analyzed the the climatic change,environmental evolution during the Holocene and summarized the rule of climate and environmental evolution in the region, which will provide reliable basis for the climatic and environmental evolution of Guanzhong area and even the whole world in the future.On three actual typical profile in the region,the deposition sequence of Loess Plateau during the Holocene is established by description of rock nature of the Holocene loess-palaeosoil,classificatiom and combining the age-dating of other scholars,Contrasting the character of the alternative indication of climate as susceptibility,analysis of particles to the analysis results of other scholars about climatic indicators in different sections,the issue summarizes the laws of climate changing of Holocene loess section,finally,explains the climate fluctuation is obvious during the Holocene in this area,and this history can be devided into 5 stages as follows:①10kaBP～8.5kaBP:It is converersion stage,the climate turned from the last glaciation to the postglacial age.At that time,the temperature becomes higher and higher.②8.5kaBP～6.3kaBP:Warm phase③6.3kaBP～5kaBP:The climate of this phase is cold④5kaBP～3.1kaBP:The climate of this phase is cold and warm alternate⑤3.1kaBP～0kaBP:The climate becomes cold Southern Weihe River of the Guangzhong area,is not only has ancient civilized magnificent history but is the one of modern civilization quite developed areas,by contrasting the climate with civilizations of human history,we can find the environment evolution with the human cultural development linked closely,the influence of human activity with the environment is remarkable.For human social harmonious stable and sustainable development environment, the deep research the environmental variation development's tendency on the locate area and the global climate is indispensable.