新疆全新世自然环境演变的几个重要时间界线

众多的地质记录表明，全新世新疆环境演变是以暖干为主要特征，但也存在一些次级波动，其演变具有以下几个重要时间界限：１２０００ａＢｐ，９００ａＢＰ，３０００ａＢＰ，１５００ａＢＰ和４００ａＢＰ，全新世期间，新疆地区经历了两种环境演变 影响，故其水热配置格局更为复杂，大致有以下几种类型：暖干，暖湿，冷湿，凉干等。

Several Important Boundaries of the Holocene Environmental Changes in Xinjiang

A large quatities of geologic records show that the Holocene environmental changes in Xinjiang are characterized by warm-dry,although alternated with some sub-fluctuations, and exists several important bounderies,i.e,12000aBP.9000aBP.3000aBP and 1500aBP.In Holocene,it has undergone two kinds of environmental change patterns(i.e,the westlies'and the monsoonal's)in Xinjiang.so that,the disposal of thermal and moisture was more complicated,at least existed several kinds as follows,the warm-dry,the warm-moisture.the cold-dry and the cold-moisture.To general speaking,the neoglacial epoches were dominated by cold (or cool )-moisture and the inter-neoglacials by warm-dry. Particularly in" ac the Climate Optimum",it mainly characterized by relative warm-moisture,although impricated by several sub-warm-dry periods.