| 近8000年来太湖北部钻孔沉积记录的环境演变 |
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| 引用本文： | 吴永红,郑祥民,周立旻.近8000年来太湖北部钻孔沉积记录的环境演变[J].海洋地质与第四纪地质,2012(1):127-132. |
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| 作者姓名： | 吴永红 郑祥民 周立旻 |
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| 作者单位： | 华东师范大学地理学系;闽江学院地理科学系 |
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| 基金项目： | 国家自然科学基金项目(41040013);中央高校基本科研业务费专项资金项目 |
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| 摘 要： | 通过对太湖北部TH-004钻孔沉积物磁化率、粒度、色度指标的测试分析,反演区域8 000年来沉积环境演变,主要表现为8～7kaBP的温暖湿润阶段,7kaBP以来环境的变冷变干,以及2.6kaBP左右的温度湿度回升。但该变化过程更主要表现为温度的快速冷暖旋回,有效湿度的变化并没有温度变化明显,这可能是由于季风降水变化主要表现在季风影响区的边缘地带,而太湖处于季风区内部,无论东亚夏季风增强或减弱,其有效湿度都不会产生明显变化。在此期间有明显的小尺度突变气候事件,特别是中世纪暖期及小冰期气候寒冷事件,在该项研究中都有很好的体现。
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| 关 键 词： | 环境演变 沉积记录 中晚全新世 太湖 |
ENVIRONMENTAL CHANGES DURING LAST 6000 YEARS INFERRED FROM SEDIMENT RECORDS OF DRILLING CORES IN NORTHERN TAIHU LAKE |
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| WU Yonghong,ZHEN Xiangmin,ZHOU Li.ENVIRONMENTAL CHANGES DURING LAST 6000 YEARS INFERRED FROM SEDIMENT RECORDS OF DRILLING CORES IN NORTHERN TAIHU LAKE[J].Marine Geology & Quaternary Geology,2012(1):127-132. |
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| Authors: | WU Yonghong ZHEN Xiangmin ZHOU Li |
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| Institution: | 1(1 The Geography Department of East China Normal University,Shanghai 200062,China; 2 The Geography Science Department of MinJiang University,Fuzhou 350108,China) |
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| Abstract: | With the data of magnetic susceptibility,grain size,SCR parameters from the sediments of Hole TH-004 in northern Taihu lake,we recontructed the history of environmental evolution of the lake over the past 8 000 years.The climate has been getting colder and drier since 7 kaBP,excepting a warm and humid stage around 2 kaBP.However,the environmental change was mainly characterized by the rapid warming and cooling cycles,and the changes in effective moisture were not significant since the changes in monsoon precipitation were mainly occurred in the periphery of the monsoon-affected zone,and the Taihu Lake was within the monsoon region,where the effective moisture did not suffer significant changes,regardless the advanceing or retreating of the East Asian summer monsoon.There were small scale abrupt climate events during this period,such as the Medieval Warm Period and Little Ice Age cold weather events. |
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| Keywords: | Environmental change Sendimentological record Mid-late Holocene Taihu |
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