摘要
500年环境变化的过程与特征涉及到大气圈、水圈、岩石圈、生物圈的变化机制和趋向等问题,研究本题目的在于寻求预测环境变化的途径,恢复和重建500年来干旱区自然环境的演变过程。这对探索人类近代环境演变的因素和趋势具有重要意义。作者选用了内陆封闭湖泊湖滨浅滩60cm剖面进行了多种气候标志的综合研究和^(210)Pb及年轮相结合的短年代学研究,并经计算机处理成图。证明了新疆内陆干旱区500年的气候变化以冷湿与暖干交替变化为主,并认为晚更新世以来青藏高原上升导致由西南季风带来暖湿气流被西风气候所代替,是形成新疆内陆西风带气候型主要原因。又从各种气候参数的斜率变化证明新疆气候是向着持续干旱方向发展的,并得知10年来可能趋向降水普遍减少更干暖化的方向发展。
The process and features of environmental change over the last 500yrs are related to the problems of the machinism and tendency among atmosphere,lithosphere, and biasphere. The purpose of this paper lies in looking for the ways to predict environmental changes, to resume and to re-built its changing process of nature environment of arid area over the last 500yrs, and this has very important significance for probing into the factors and tendency of short-term human being's environmental development.
The author select the 60 cm long core which situates in the closed inland Balikun-lakeside to carry out a comprehensive research on various climatic signals by multiple means. Combining with short chronological researches and processing and mapping by computer, the author has verified the exis tence of the pattern of climatic changes wnich is dominated alternatively by cold-wet and warm-dry in inland arid area Xinjiang. Since 500yrBP and drawn the conclusion that the rise of Qin-Zhang plateau since late pleistocene which resulted in the warm-wet south-west monsoon current being replaced by the westly current is the main reason that has formed the inland westly belt climatic style in Xinjiang. The changs of various climatic parameters show that the climate of Xinjiang is tending to constant drought and also show that in the future 10years it will tend towards less precipitation and more warmdrought.
出处
《新疆大学学报（自然科学版）》
CAS
1991年第2期80-89,共10页
Journal of Xinjiang University(Natural Science Edition)
基金
国家自然科学基金
