| 引用本文: | 瞿文川,薛滨,Mike Dickman,吴艳宏,王苏民,吴瑞金,张平中,陈践方,何海军.太湖14000年来古环境演化的湖泊记录.湖泊科学,1998,10(s1):331-340. DOI:10.18307/1998.sup36 |
| QU Wenchuan,XUE Bin,Mike Dickman,WU Yanhong,WANG Sumin,WU Ruijin,ZHANG Pingzhong,CHEN Jianfang,HE Haijun.Lake Taihu Record of Paleoenvironmental Changes over the Past 14000 Years. J. Lake Sci.1998,10(s1):331-340. DOI:10.18307/1998.sup36 |
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| 太湖14000年来古环境演化的湖泊记录 |
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瞿文川1, 薛滨1, Mike Dickman2, 吴艳宏1, 王苏民1, 吴瑞金1, 张平中3, 陈践方3, 何海军1
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1.Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008;2.Department of Ecology and Biodiversity, The University of Hong Kong;3.Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000
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| 摘要: |
| Two sediment cores, one 396 cm long from west Taihu Lake, another 246 cm long from east Taihu Lake, are interpreted from the analysis of their magnetic susceptibility, total organic carbon, total nitrogen, total pigments, organic carbon isotope, hydrogen index, saturated hydrocarbons, 14C dating and surficial sediment conditions. The west Taihu Lake core is the longest one studied in this lake so far, and has provided us the most complete environmental and climatic information for this lake. The results from the west Taihu lake core indicate that Taihu Lake has undergone the following stages:from ca.14 300 to 13 300 aB.P. Taihu Lake was in low lake-level, and there existed exposed features from the proxies reflecting arid paleoclimate. From ca.13 300 to 12 400 aB.P. an arid transitional stages occurred with a slightly warmer and wetter climate. From ca. 12 400 to 10 900 aB.P. a period of large climatic fluctuation occurred and from 10900-10 000 aB.P. a warm period developed with deep water and strongly reducing sediments. During ca.10 000-7 200aB.P., a cool transitional period alternating with a warm climate occurred. It was warm and wet during 7 200-5 700aB.P.; some proxies changed violently in 5 050aB.P., reflecting obvious changes in material source and a probable interruption of sedimentation. The east Taihu Lake history from ca. 6 550 to 6 450 aBP, the climate was cold and dry, and gradually turned warm and wet in ca. 6 450-6 050 aBP. It was warm and wet in ca. 6 050-5 800 aBP and had a cold tendency in 5 800-ca. 5 000 aBP. An abrupt change occurred at ca. 5 000 aBP, and the lake sediment in the uppmost part was disturbed by wave action indicating shallow water conditions. |
| 关键词: Taihu Lake 14Ka Paleoenvironmental Evolution Lake Record |
| DOI：10.18307/1998.sup36 |
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| Lake Taihu Record of Paleoenvironmental Changes over the Past 14000 Years |
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QU Wenchuan1, XUE Bin1, Mike Dickman2, WU Yanhong1, WANG Sumin1, WU Ruijin1, ZHANG Pingzhong3, CHEN Jianfang3, HE Haijun1
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1.Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008;2.Department of Ecology and Biodiversity, The University of Hong Kong;3.Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000
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| Abstract: |
| Two sediment cores, one 396 cm long from west Taihu Lake, another 246 cm long from east Taihu Lake, are interpreted from the analysis of their magnetic susceptibility, total organic carbon, total nitrogen, total pigments, organic carbon isotope, hydrogen index, saturated hydrocarbons, 14C dating and surficial sediment conditions. The west Taihu Lake core is the longest one studied in this lake so far, and has provided us the most complete environmental and climatic information for this lake. The results from the west Taihu lake core indicate that Taihu Lake has undergone the following stages:from ca.14 300 to 13 300 aB.P. Taihu Lake was in low lake-level, and there existed exposed features from the proxies reflecting arid paleoclimate. From ca.13 300 to 12 400 aB.P. an arid transitional stages occurred with a slightly warmer and wetter climate. From ca. 12 400 to 10 900 aB.P. a period of large climatic fluctuation occurred and from 10900-10 000 aB.P. a warm period developed with deep water and strongly reducing sediments. During ca.10 000-7 200aB.P., a cool transitional period alternating with a warm climate occurred. It was warm and wet during 7 200-5 700aB.P.; some proxies changed violently in 5 050aB.P., reflecting obvious changes in material source and a probable interruption of sedimentation. The east Taihu Lake history from ca. 6 550 to 6 450 aBP, the climate was cold and dry, and gradually turned warm and wet in ca. 6 450-6 050 aBP. It was warm and wet in ca. 6 050-5 800 aBP and had a cold tendency in 5 800-ca. 5 000 aBP. An abrupt change occurred at ca. 5 000 aBP, and the lake sediment in the uppmost part was disturbed by wave action indicating shallow water conditions. |
| Key words: Taihu Lake 14Ka Paleoenvironmental Evolution Lake Record |
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