%0 Journal Article
%T COMPARISON OF PLIO-PLEISTOCENE CLIMATIC CHANGES IN DIFFERENT MONSOONAL REGIONS AND IMPLICATIONSFOR HUMAN EVOLUTION<br>季风区古环境演化的相似性与人类演化
%A Liu Tungsheng
%A Ding Zhongli
%A <br>刘东生
%A 丁仲礼
%J 第四纪研究
%D 1999
%I 
%X The summer monsoonal winds over the Asia-African continents consist of three branches: the East-Asia southeast monsoon, the Indian southwest monsoon and the west African monsoon. As these monsoons are forced by different factors,it would be expected that they may have been established in different ages and undergone adifferent evolution history. To date,the bine when the three monsoon circulations wereinitiated in geologic past is still open to debate,but their evolution in the Plio-Pleistocene period has been relatively completely documented by sediments such ascontinental loess and marine eolian deposits. In this study,we conducted a comparisonof the Plio-Pleistocene climatic records derived from the Chinese Loess Plateau,Arabian Sea and low-latitude Atlantic Ocean. The marine climatic records weregenerated from eolian sediments,thus indicative of changes in intensity of monsoonalwinds or the climate in the source regions. Results show that the eolian sequenceshave recorded three climatic shifts of the Pli0-Pleistocene period.They occurred near 2.8~2.5MaB. P., 1.8~ 1.6Ma B. P. and 1.2~ 0.6 MaB. P., respectively. The 2.8~2.5MaB. P. shift is characterized by the increase in amplitude of climatic oscillationsand the occurrence of the 41 000a tilt periodicity. The 41 000a Period becomepredominant near 1.8~1.6MaB. P. At about 1.0 Ma, the 100 000a climatic Periodappeared and become dominant near 0.6MaB. P. Although the details of climaticchanges in the three regions are not necessarily the same, the similarity of the climatic shifts still suggests a common trends of monsoonal evolution over the Asia-African continents. It is indicated that the similar evolution of the monsoonalcirculations may have important implications for human evolution in the late Cenozoic.
%K monsoonal regions
%K eolian deposits
%K climatic shifts
%K human evolution<br>季风区
%K 风成沉积
%K 气候转型事件
%K 人类演化
%K 古环境
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=EA07051745CDC8D89D5F01A3A4CFE6A9&aid=7AD2EFE55275D405642A5108637892D3&yid=B914830F5B1D1078&vid=2A8D03AD8076A2E3&iid=E158A972A605785F&sid=F50A8B5513721E1C&eid=88D36036CFF69B3C&journal_id=1001-7410&journal_name=第四纪研究&referenced_num=11&reference_num=17