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引用本文:刘一兰,张恩楼,刘恩峰,王荣,袁和忠,孔德平,周起超.人类活动影响下的云南阳宗海近百年有机碳与黑炭湖泊沉积记录.湖泊科学,2017,29(4):1018-1028. DOI:10.18307/2017.0426
LIU Yilan,ZHANG Enlou,LIU Enfeng,WANG Rong,YUAN Hezhong,KONG Deping,ZHOU Qichao.TOC and Black Carbon records in sediment of Lake Yangzong, Yunnan Province under the influence of human activities during the past century. J. Lake Sci.2017,29(4):1018-1028. DOI:10.18307/2017.0426
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人类活动影响下的云南阳宗海近百年有机碳与黑炭湖泊沉积记录
刘一兰1,2, 张恩楼2, 刘恩峰2, 王荣2, 袁和忠3, 孔德平4, 周起超2,4
1.南京大学环境学院, 南京 210023;2.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;3.南京信息工程大学, 南京 210044;4.云南省环境科学研究院高原湖泊流域污染过程与管理云南省重点实验室, 昆明 650034
摘要:
利用我国云南省昆明市阳宗海湖心40 cm沉积岩芯,分析总氮(TN)、有机碳(TOC)、黑炭(BC)含量和黑炭同位素(δ13CBC)等多环境指标,采用137Cs和210Pb定年方法建立沉积岩芯年代序列,探讨阳宗海近百年来TOC以及BC沉积变化特征及其对区域人类活动的响应. 结果表明:(1)阳宗海沉积岩芯中TN、TOC和BC含量分别为0.76~5.07、4.95~42.65和0.69~11.16 mg/g;δ13CBC值为-31.03‰~-25.45‰,均值为-27.18‰;(2)TN、TOC含量自下而上同步增长,TOC/TN摩尔比值在1994年左右增长到最大值后逐渐减小,反映了流域内人为活动导致的外源性TOC增加,阳宗海水体逐渐富营养化;(3)阳宗海沉积岩芯中BC含量及其同位素的时间序列变化,反映了当地能源结构的变化,工业源和居民消费源成为阳宗海BC的主要来源,BC与人口数量和能耗间呈显著相关.
关键词:  有机碳  黑炭  黑炭同位素  人类活动  阳宗海
DOI:10.18307/2017.0426
分类号:
基金项目:科技部基础性工作专项(2014FY110400)、国家自然科学基金项目(41272380,41572337,41271214)和云南省科技计划项目(2015RA084)联合资助.
TOC and Black Carbon records in sediment of Lake Yangzong, Yunnan Province under the influence of human activities during the past century
LIU Yilan1,2, ZHANG Enlou2, LIU Enfeng2, WANG Rong2, YUAN Hezhong3, KONG Deping4, ZHOU Qichao2,4
1.School of the Environment, Nanjing University, Nanjing 210023, P.R.China;2.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;3.Nanjing University of Information Science & Technology, Nanjing 210044, P.R.China;4.Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-watershed, Yunnan Institute of Environmental Science, Kunming 650034, P.R.China
Abstract:
Multi-proxy, including total nitrogen (TN), total organic carbon (TOC), black carbon (BC) and its stable carbon isotope (δ13CBC), were analyzed in the 40 cm sediment core from Lake Yangzong in Kunming city,Yunnan province. The sediment core was dated using 137Cs and 210Pb, and then we discussed the deposition processes of TOC and BC responding to human activities during the past 100 years in Lake Yangzong Basin. The results showed that:(1)the contents of TN,TOC and BC in the core of Lake Yangzong ranged from 0.76 to 5.07 mg/g, 4.95 to 42.65 mg/g, 0.69 to 11.16 mg/g, respectively, and the δ13CBC values ranged from -31.03‰ to -25.45‰ with a mean of -27.18‰; (2) the TN and TOC contents were both increased from the bottom to the top of the sediment core, and the molar ratio of TOC/TN reached a maximum in 1994 A.D. then gradually decreased, which indicated that the exogenous pollutants produced by human activities in the basin were continuously discharged into the Lake Yangzong, and led to an eutrophication of the lake; (3) the changes of BC and δ13CBC series in the sediment core in Lake Yangzong reflected the changes of local energy structure. With the rapid development of population growth and industrialization, carbon emissions were accelerated by the present energy consumption structure which were primarily depended on coal, and industrial and residents' consumption became the main sources of BC in Lake Yangzong. In addition, significant correlations were found between the BC and the population.
Key words:  Total organic carbon  black carbon  δ13CBC  human activities  Lake Yangzong
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