新疆全新世自然环境演变的几个重要时间界线

Several Important Boundaries of the Holocene Environmental Changes in Xinjiang

众多的地质记录表明．全新世新疆环境演变是以暖于为主要特征的，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模式的影响（酉风型与季风型），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（凉）湿）、凉干等．总的来说，新冰期是以冷（凉）湿为主要特征的，而间冰段则是以暖干为主要特色，但是在“气候适宜期中”，由于西南季风的伸人影响．暖湿特征非常显著．

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.