| 近12kaBP以来南疆博斯腾湖气候环境演化 |
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| 引用本文： | 钟巍,熊黑钢.近12kaBP以来南疆博斯腾湖气候环境演化[J].干旱区资源与环境,1998,12(3):29-35. |
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| 作者姓名： | 钟巍 熊黑钢 |
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| 作者单位： | 新疆大学地理系 |
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| 摘 要： | 根据博斯腾湖沉积物自生碳酸盐稳定同位素以及孢粉和地化元素资料的分析，建立了近１２ｋａＢＰ以来此地区的气候环境的演变序列，并得到以下结论：（１）其气候演变特征同新疆地区由其他地质记录所反映的基本一致，气候演变具有明显的西风型环境演变特征，表现为冷与相对湿润、暖与相对干旱的水热配置关系；（２）由δ（１８）Ｏ所反映的温度波动存在显著的后期增温特征，结合δ（１３）Ｃ及Ｃａ－ＣＯ３等指标的变化，可以划分出若干具有广泛区域一致性的冷暖阶段，其中暖峰主要出现于１１．５－１１．０ｋａ、９．４ｋａ、７．５－７．０ｋａ、６．０－５．５ｋａ、３．０ｋａ和２．０ｋａＢＰ；而冷峰主要出现于１１．０－１０．０ｋａ、８．８ｋａ、５．０－４．５ｋａ、３．３ｋａ和１．５ｋａＢＰ和２．０－１．５ｋａＢＰ期间快速的冷暖变化都具有显著的突变性特征；（４）在７．０－５．０ｋａＢＰ期间相对暖湿的环境特征可能是全新世大暖期鼎盛期的反映，这也是剖面中唯一的最为显著的暖湿期。
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| 关 键 词： | 博斯腾湖 12kaBP以来 气候环境演变 |
PRELIMINARY STUDY ON PALEOCLIMATIC EVOLUTION SINCE ABOUT 12KaBP IN BOSTEN LAKE,SOUTHERN XINJIANG,CHINA |
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| Zhong Wei\ Xiong Heigang.PRELIMINARY STUDY ON PALEOCLIMATIC EVOLUTION SINCE ABOUT 12KaBP IN BOSTEN LAKE,SOUTHERN XINJIANG,CHINA[J].Journal of Arid Land Resources and Environment,1998,12(3):29-35. |
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| Authors: | Zhong Wei\ Xiong Heigang |
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| Abstract: | Based on the lacustrine cabonate stable isotope fluctuation,combining with the geochemical element contents and pollen data,a paleoclimatic history of Bosten lake since about 12kaBP has been outlined,the sequence of paleoclimatic evolution is established,with the following results obtained;(1)The sequence of warming or cooling changes in palaeoclimate since about 12kaBP around Bostem lake shows a global nature,which basically synchronize with other geological recordes in Xinjiang,and with that of the eastern China monsoonal area and some places over the world.But paleoaclimatic changes presented apparent Westlies Style model:during cold periodes,regime aggravated.(2)The temperature reflected by δ 18 O has evident features by increase in the late period during Holocene.On the basis of multi-disciplinary analyses,several cold and warm phases which are of broad regional significance can be identified.The warm peaks occurres at about 11.5-11.0ka、9.4ka、7.5-7.0ka、6.0-5.5ka、3.0ka and 2.0kaB.P.;the cold peaks at 11.0-10.5ka、8.8ka、5.0-4.5ka、3.3ka and 1.5kaB.p..(3)Several climatic events with the nature of“Abrupt Climatic Changes”are revealed in this section,i.e 11.0-10.5ka、9.4-8.8ka and 5.5-5.0ka、2.1-1.5kaB.P..(4) During 7.0-5.0kaBP,relatively warm humid condition in response to the Megathermal Maximum period of Holocene may be induced from strengthened southwest monsoos force,which was possibly able to influence this area because of global warming. |
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| Keywords: | Bosten lake 12kaBP climatic changes |
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