全新世新疆自然环境演变初论──地质记录及演变序列

众多地质记录表明，新疆全新世气候环境是以暖干为主要特征的，但其中也有次级波动。其演变具有以下几个重要界线，即１２０００ａＢｐ，９０００ａＢｐ，３０００ａＢｐ和１５００ａＢｐ。由于全新世以来新疆经历了两种环境演变模式的影响（西风型和季风型），故此其环境演变格局中水热配置关系更加复杂，大致有以下几种类型：暖干、暖（温）湿、冷（凉）湿、凉干等。，总的说来，新疆新冰期是以冷（凉）湿为主要特征；而气候最适宜期中，虽有次级暖干波动，但总背景是暖或温湿的。

PRELIMINARY DISCUSSION ON THE HOLOCENE ENVIRONMENTAL CHANGES IN XINJIANG GEOLOGIC RECORDS AND SEQUENCES

A series geologic records show that it is of the characteristics of warm一dryness inXinjiang during the Holocene,though there are also sub-climatic fluctuations. Severalvery important dating boundaries of enviromental changes can be interpreted as follows:12000aBP,9000aBP,3000aBP,and 1500aBP. Due to undergoing the influence of two kindsof environmental change patten since the beginning of the Holocene(the westlies and themonsoon styles),so the disposal of hydro-thermal is more complicated,for example,warm-dryness,warm(temperate)-dryness,cold(cool)-humid, cool-dryness etc.Generally speaking,each neo-glacial epoch in Xinjiang is of the characteristics of cold(orcool )-humid and during the″Maximum Optimum″Period,though also existing the sub-fluctuation of warm-dryness,it is maily of warm(or temperate)-humid.