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选择位于西风区的乌伦古湖为研究对象,利用AMS14C测年手段建立了乌伦古湖沉积岩芯全新世以来的时间序列.对湖泊沉积物中的孢粉、TOC,TN、有机δ13Corg、介形组合及其壳体δ18O,δ13Ccarb等多项环境代用指标的综合分析表明,全新世以来乌伦古湖地区古气候经历了温干(10.0～7.6cal ka BP)-暖湿(7.6～5.3cal ka BP)-暖干(5.3～3.6cal ka BP)-温干(3.6～2.1cal ka BP)-温湿(2.1～1.3cal ka BP)-凉干(1.3cal ka BP以来)的变化过程.随着气候的变化,湖泊曾出现明显的高湖面时期(7.6～5.3cal ka BP)和两次较大规模的退缩(5.3～3.6和1.3cal ka BP以来).乌伦古湖地区的气候环境演化与周边区域环境变化记录有很好的一致性,响应了区域环境变化和全球气候突变事件,基本遵循全新世气候变化的西风模式.
The Wulungu Lake located in the west wind is selected as the research object, and the time series of the sedimentary core of Wulungu Lake since the Holocene was established by means of AMS14C dating.On the basis of the analysis of the pollen, TOC, TN, organic δ13Corg, The comprehensive analysis of the paleo-climatic assemblages and their δ18O, δ13Ccarb and many other environmental proxies shows that the Paleo-climatic changes in the Wulungu Lake region since the Holocene have experienced warm-dry (10.0 ~ 7.6cal ka BP) -warm-warm (7.6 ~ 5.3cal ka BP) -warm-drying (5.3-3.6 cal ka BP) -temperature variation (3.6 ~ 2.1 cal ka BP) -temperature and humidity (2.1 ~ 1.3 cal ka BP) With the change of climate, the clear high lake period (7.6 ~ 5.3cal ka BP) and two large scale shrinkages (5.3 ~ 3.6 and 1.3cal ka BP) have occurred in the lakes. The climate of Wulungu Lake Evolution is in good agreement with records of environmental changes in the surrounding areas. It responds to regional environmental changes and sudden changes in global climate and basically follows the westerly pattern of climate change during the Holocene.