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中文摘要：
通过对新疆巴里坤湖的地层剖面进行的精确定年和孢粉分析，结合现代表土孢粉数据，重建了该地区16．7cal ka BP以来的植被和环境演化历史．结果表明，在末次冰消期及早全新世（16．7～7．9cal ka BP）研究区以荒漠植被为主，A／C值所指示的有效湿度明显偏低，气候干旱．其中在16．7～8．9cal ka BP期间，气候环境最为恶劣；8．9～7．9cal ka BP为气候环境逐渐改善的过渡期．研究区在中全新世（7．9～4．3cal ka BP）为荒漠草原／草原，有效湿度明显升高，气候环境相对最为适宜，湖泊周围高地可能有片状的桦木林地出现．在4.3～3．8cal ka BP这一短暂时期，研究区植被由荒漠草原／草原迅速转变为荒漠，有效湿度显著降低，可能是一次百年尺度的干旱气候事件．研究区在晚全新世（3．8～0．53cal ka BP）呈现出典型的荒漠草原／草原草甸景观，有效湿度相对较高，气候环境相对较为适宜；0．53cal ka BP以来，呈现荒漠植被景观．区域对比显示，该地区16．7cal ka BP以来的气候环境演化特征与东亚季风影响区有着明显的差异，在末次冰消期-早全新世气候干旱，中全新世-晚全新世气侯相对湿润．
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