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引用本文:薛滨,瞿文川,吴艳宏,王苏民,吴瑞金.太湖晚冰期—全新世气候、环境变化的沉积记录.湖泊科学,1998,10(2):30-36. DOI:10.18307/1998.0206
Xue Bin,Qu Wenchuan,Wu Yanhong,Wang Sumin,Wu Ruijin.Sedimentological Record of Paleoenvironm ent of Taihu Lake in Late—Glacial to Holocene. J. Lake Sci.1998,10(2):30-36. DOI:10.18307/1998.0206
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太湖晚冰期—全新世气候、环境变化的沉积记录
薛滨, 瞿文川, 吴艳宏, 王苏民, 吴瑞金
中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室, 南京 210008
摘要:
本文根据西太湖3.96m长湖泊岩芯沉积物的地球化学、微体占生物的综合分析.讨论了太湖距今14000多年来的演化过程,结果表明:14300-13000aBP气候干旱,西太湖尚未形成;13000-11030aBP降水增加,湖泊形成.但气候偏凉;11030-10200aBP是一个较显著的冷偏湿期.湖泊水位相对较深;10200-9500aBP为一温干时期;9500-7200aBP是偏暖湿的过渡阶段.内部波动剧烈;7200-5700aBP为一暖湿期;5700-4900aBP各项指标发生突变,地层存在沉积间断;4900aBP至今,湖泊水深减小,湖底沉积物受波浪扰动,藻类生长茂盛,富营养化程度逐渐严重.
关键词:  太湖  14ka  环境变化  沉积记录
DOI:10.18307/1998.0206
分类号:
基金项目:中国科学院院重大项目(KZ951-A-402);湖沼专项课题
Sedimentological Record of Paleoenvironm ent of Taihu Lake in Late—Glacial to Holocene
Xue Bin, Qu Wenchuan, Wu Yanhong, Wang Sumin, Wu Ruijin
Lake Sedimentation and Enviroment Lab., Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008
Abstract:
According to the analysis on TOC,TN.pigment,organic carbon isotope.HI and "Cdating etc. obtained from the sedim ents of a 3.96m-long core in W est Taihu Lake、it ispossible to understand the evolution of paleoenvironment during the last 14000 years inTaihu Lake. The results show that the evolution of paleoenvironment has undergone thefollowing stages:Before West Taihu Lake was formed.there existed exposed feature fromthe proxies in l 4300-13000aBP.reflecting arid paleoclimate.After the lake was formed.the climate got CO0l in 13000~ l 1030aBP. All proxies showed a distinct cold and wetterclimate in l1030~ 10200aBP. It was a warm and dry period in 10200-9500aBP.and thenturned into a transitional stage of warmer and wetter climate with drastic fluctuation.It waswarm and wet during 7200-5700aBP,Some proxies changed violently in 570O-4900aBP.reflecting a probable interruption of sedimentation. The lake began to be eutrophic in4900aBP or later.
Key words:  Taihu Lake  14ka  environm ental change  sedimentological record
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