Pollen-Based Quantitative Reconstruction Of About 600a Climate Changes In The Daihai Lake Area, Inner Mongolia, China

Daihai basin lies in Liangcheng which is between inner Mongolia and Shanxi province, the not too large inland lake in China,it was influenced by monsoon climate and west wind.It showed the transitional situation of semi-humid and semi-dry,so it was the perfect proxy to study the changes of climate and environment.Short sediment cores(103cm) retrieved from Daihai Lake,and achieve 103 samples,A higher resolution pollen record from core reveals five stages of the vegetation succession and climate changes of Dahai Basin since 600 cal.a B.P,The result indicates that the climate can be divided into five stages:a cool and wet climate between 1382-1430a A.D.,in which period precipitation change obviously,have a cold and wet event;a warm and dry climate between 1430-1583a A.D.,a cold and humid climate during the Little Ice Age(1583-1824 A.D.),also have a dry event,a warm and dry climate between 1824-1935a A.D.,The result indicates that though the pollen assemblage have some changes during the past 600 cal.a B.P.,it can reflect the plain character.During the LIA the pollen assemblage is different from other period of time,and the pollen concentrations are the lowest.