内蒙古与冲绳海槽和南中国海晚第四纪末次冰川盛冰期以来古气候记录

控制东亚气候的东亚季风夏季风北界的内蒙古盐湖沉积物记录了晚第四纪末次冰川盛冰期以来的气候冷暖干湿变化特征及各类重要的气候事件。通过对内蒙古伊克昭盟杭锦旗盐海子Ya0 1孔岩心沉积物的有机碳、碳氮比、碎屑矿物成熟度、磁化率、氧碳稳定同位素和沉积物成分的研究表明 ,全新世大暖期起止时间为 8～ 4kaB .P .,其气候特征为暖干型。这一气候特点可与中国北方黄土、冰川、冲绳海槽沉积物及南海有孔虫Pulleniatinaobliguilocalata等代用气候材料所记录的气候波动进行对比 ,也可与加拿大阿尔伯特地区及北美大平原全新世的气候演变特征进行对比。

Paleoclimatic Reconds of Inner Mongolia,the Okinawa Trough and the South China Sea since the Last Glacial Maximum during the Late Quaternany

Climate in East Asia is largely controlled by the East Asian Monsoon System responding to the strength of high and low pressure cells which grow and decay seasonally over the Asian landmass.The Holocene Optimum started 8 KaB.P.and did to cool at 4 KaB.P. with warm dry type climate in Inner Mongolia on the basis of data from TOC(%),TOC/TN,maturity index F/(F+Q)%],M.S(SI), δ 18 O and δ 13 C(‰ PDB) as well as sedimentary composition(%) of core Ya01 in the salt lake Yanhaizi of Inner Mongolia Hangjingqi.It corresponded to climatic information of Holocene Optimnm form all of climata succedaneum of the morthern China loess and glacier,Okinawa Trough deposits and foramimfer Pulleniatina obliquilocalata of the South China Sea as well as did to climatic evolution characteristics from Alberta and the northern Great Plains of America during Holocene.