历史时期(着重近4kaB.P.以来)南疆地区气候环境与人地关系演化的初步研究

南疆地区近四千年来气候与环境演化的研究表明 ,本地区气候环境的干旱状况持续未变 ,但期间仍有若干次相对凉湿与暖干旱时期的波动 ,且揭示出 3 .0 ka B.P.、2 .0 ka B.P.、1.5 ka B.P.、1.0 ka B.P.、0 .2 ka B.P.五个气候突变转干时间界线。本研究揭示了近四千年来本地区持续干旱化的特征 ,并有后期加剧的趋势 ,并指出历史时期南疆地区若干人文事件的发生如近两千年以来丝绸之路的兴衰、南疆古城镇的废弃等与气候环境演化之间存在着良好的准对应关系 ,表明气候环境的自然演化是影响人地关系类型与内容的重要因素之一。

PRELIMINARY STUDY ON HISTORICAL PALEOCLIMATE AND MAN-LAND RELATIONSHIP DEVELOPMENT IN SOUTHERN XINJIANG SINCE ABOUT 4kaB.P.

A synthetic study on the development of climate shows that it has been characterizing drought consecutively since about 4kaB.P.in southern Xinjiang,but relative humid periods can be identified,and abrupt dry-warming time boundaries are indicated at 3.0kaB.P.,2.0kaB.P.,1.5kaB.P.,1.0kaB.P.and 0.2kaB.P..These above mentioned abrupt climatic warm-dryness basically coincided well with the periods of the phases of ancient cities abandoned in southern Xinjiang and also with the rise and decline of the ancient Silk Road.The quasi-correlation between the changes of climate and the type and content of man-land relationship implys that the natural evolution of climate and environment perhaps plays an another very important role in affecting man-land relationship in arid area.