晚更新世晚期北疆内陆型气候环境变迁*

选取具有干旱区特征的内陆湖泊纹泥沉积,采用多种分析手段进行综合研究,本文探索北疆地区3.5万年以来的环境演变中物理、化学、生物过程相互作用状况,建立内陆型气候的环境演变模式,提出本区属冷湿暖干型气候,且以冷湿环境为主的区域特征。

ENVIRONMENTAL CHANGE OF INLAND-TYPE CLIMATE DURING THE LATE PERIOD OF LATE-PLEISTOCENE IN NORTHERN XINJIANG

In this paper, based on using sedimentary profile, i.e., representative Hole A and combining the age-determination date, we have synthetically studied the various environmental elements of Balikun lake in northern Xjnjiang.Then we have gained the sedimentary environmental signs that fit in with the biological, physical and chemical processes in arid land, which confirmed that the environmental change of Balikun Lake has evolved in the climatic pattern of alternating between cold-wet and warm-dry. In other words, the environmental change in this region acted upon the inland-type climate since the late period of late-pleistocene. Owing to the influence of the special geographic position and inner-outer factors of climatic system, fluctuating intensity, range and period of the inland-type climate have displayed the regional difference in time-space distribution, which constitute the change model of inland-type climate. The result mentioned above provides the new evidence for regional study jn globe change.