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Chronology of Holocene lacustrine sediments in Co Ngoin, central Tibetan Plateau

Science china Earth sciences 2006年第9期49卷 991-1001页

作者： wu yanhong1, wang sumin1& hou xinhua1,{2., {3. Institute of Geography and Limnology, chinese academy of sciences, nanjing 2.0008, china 2. Institute of Tibetan Plateau Research, chinese academy of sciences, Beijing 10085, china 3. Graduate University of chinese academy of sciences, Beijing 10003., china 1. key laboratory of {2. {3. and environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China 2. Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 10085 China 3. Graduate University of chinese academy of sciences Beijing 100039 China

Chronology is the basis for using lacustrine sediments to reconstruct the history of en-vironmental change. Radioactive-nuclides such as 14C, 2.0Pb and 13.Cs dating are mainly used to establish the chronology for recent several ten thousand years. Because of being mixed with “dead carbon”, the measured 14C age is always older than the actual age which is recognized as “reservoir effect”. Cs is a kind of active metal element, and easy to migrate vertically in the sediment that leads to the error of the time marker. 2.0Pb dating should make sure to select CIC model or CRS model. On the Tibetan Plateau, most of the {2.s are alkaline closed {2. where Cs is more moveable in the sediment and the reservoir effect caused by “dead carbon” on 14C dating is stronger. Based on the analysis on results of 14C, 2.0Pb and 13.Cs of the lacustrine sediments from Co Ngoin, central Tibetan Plateau, we use the simple regression method to re-calculate the 14C calendar ages, and establish the time sequence for cores CE-1 and CE-2.with result of 2.0Pb CRS model for the upper 3. cm and re-calculated 14C calendar age for sediments bellow 3. cm. Since 1400 cal. a BP, sedimentation inter-rupted for more than 1000 years. According to this time sequence, variations of environmental proxies confidently reflect the major climatic events in Holocene.

关键词： 14C, 2.0Pb and 13.Cs, chronology, lacustrine sediments, climatic event, Co Ngoin, central Tibetan Plateau.

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柴西南地区油气成藏特征及有利储层预测

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天然气工业 2004年第9期24卷 8-10页

作者：江波司丹王兰生尹成明张永庶吴因业中国科学院广州地球化学研究所中国石油青海油田分公司中国石油西南油气田分公司中国石油勘探开发研究院

柴达木盆地柴西南地区是盆地内油气资源最为富集的地区 ,目前已进入战略展开阶段。勘探实践证实该区发育E3.1.E3.2.、N1和N2.1多套成藏组合和多种油气藏类型 ,具备形成复式油气聚集带的有利地质条件。通过应用层序地层学的一般原理 ,... 详细信息

柴达木盆地柴西南地区是盆地内油气资源最为富集的地区 ,目前已进入战略展开阶段。勘探实践证实该区发育E3.1.E3.2.、N1和N2.1多套成藏组合和多种油气藏类型 ,具备形成复式油气聚集带的有利地质条件。通过应用层序地层学的一般原理 ,利用钻井、地震等资料对昆北—柴西南地区进行了沉积储层的研究与预测 ,发现该区E3.1.E3.2.、N1湖侵体系域砂体发育 ,对油气的聚集与分布有利 ,砂体类型较为丰富 ,有利储集体主要在东柴山和切克里克地区发育的三角洲前缘砂体和三角洲平原水上分流河道砂体 ,同时该区深湖—半深湖沉积区沟道浊积砂体以及滨浅湖沉积区发育的湖滩砂体可以作为有利的储集体 ,形成隐蔽油气藏。目前青海油田分公司已将柴西南地区岩性油气藏列为重点目标实施勘探。

关键词：储层预测储集体浊积砂体油气成藏砂体类型勘探层序地层学油气藏类型复式油气聚集带钻井

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Superconducting state in Ba_((1-x)) Sr_(x)Ni_(2.As_(2. near the quantum critical point

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chinese Physics B 2024年第6期33卷 488-493页

作者：余承峰张宗源宋林兴吴彦玮袁小秋侯杰涂玉兵侯兴元李世亮单磊 Information Materials and Intelligent Sensing laboratory of Anhui Province Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China key laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University) Ministry of EducationHefei 230601China Beijing National laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical sciences University of Chinese Academy of SciencesBeijing 100190China Songshan lake Materials laboratory Dongguan 523808China

In the phase diagram of the nickel-based superconductor Ba_(1-x)Sr_(x)Ni_(2.As_(2.,T_(C) has been found to be enhanced sixfold near the quantum critical point(QCP) x=0.71 compared with the parent ***,the mechanism is still under ***,we report a detailed investigation of the superconducting properties near the QCP(x≈0.7) by utilizing scanning tunneling microscopy and *** temperature-dependent superconducting gap and magnetic vortex state were obtained and analyzed in the framework of the Bardeen-Cooper-Schrieffer *** ideal isotropic s-wave superconducting gap excludes the long-speculated nematic fluctuations while preferring strong electron-phonon coupling as the mechanism for T_(C) enhancement near the *** lower than expected gap ratio of Δ/(k_(B) T_(C)) is rooted in the fact that Ba_(1-x)Sr_(x)Ni_(2.As_(2. falls into the dirty limit with a serious pair breaking effect similar to the parent compound.

关键词： nickel-based superconductor electron–phonon coupling dirty limit scanning tunneling microscopy/spectroscopy

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Status of aquatic organisms resources and their environments in Yangtze River system(2.17-2.2.)⋆

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Aquaculture and Fisheries 2024年第5期9卷 833-850页

作者： Haile Yang Li Shen Yongfeng He Huiwu Tian Lei Gao Jinming wu Zhigang Mei Nian Wei Lin {2. Tingbing Zhu Feifei Hu Jinling Gong Hongchun Du Xinbin Duan Huatang Deng Daoqun {2. Fengyue Zhu Yunfeng Li Fan wu Huijun Ru Yan Zhang Junyi Li Junlin Yang Yuntao Zhou Dongdong Fang Yinping {2. Danqing Lin Yanping Yang Peijie Li Silei Liu Jian Yang Ping Zhuang Sikai {2. Tao Zhang Gang Yang Wenbo Yang Lilai Yuan Kun Cao Shuo Xu Huiyuan Liu Zhiqiang Liang Chongrui {2. Hong Li Xiping Yuan Xin Yang Yilong Fu Yanping Zhang Haixin Zhang Zhiying Tao Sheng {2. Xiaoping Gao Binsong Jin Kemao Li Guojie {2. Shenglong Jian Yingqin Li Chenjiang Xue Chunyun Lei Shaowei Xue Yi Sun Bin Zhu Ke Shao Xingkun Hu Meihua Xiong Jun Du Bin He Tao Yan Yingying Huang Yuanchao Zou Biwen Xie Yongming {2. Bin Li Fei Liu Yaoyao Zhang Fei Fan Zhijian {2. Jing Huang Haoran Gu Hailong Ge Yan Dan Yan Li Shuqiao {2. Chuang Zhang Lu Zhou Xue {2. Sheng Zeng Yan Xiang Xugang He Jianhui Qin Chengxing Xia Jie hou Yifu Shi Lifang Gao Zhiqiang Zhu Hongbao Shen Yun Du Xuejun Duan Jiawu Xiong Deguo Yang Shaoping Liu Zhaohui Ni Hui Zhang Kai Liu Feng Zhao Yingren Li Jianwei {2. Qiwei Wei Yangtze River Fisheries Research Institute Chinese Academy of Fishery SciencesWuhan430223China Institute of Hydrobiology Chinese Academy of SciencesWuhan430072China Fishery Resource and environment Research Center Chinese Academy of Fishery SciencesBeijing100141China key laboratory of Freshwater Fisheries and Germplasm Resources Utilization Ministry of Agriculture and Rural AffairsFreshwater Fisheries Research CenterChinese Academy of Fishery SciencesWuxi214081China East china Sea Fisheries Research Institute Chinese Academy of Fishery SciencesShanghai200090China Institute of Fisheries Engineering Chinese Academy of Fishery SciencesBeijing100141China Hunan Fisheries Science Institute Changsha410153China Jiangxi Fisheries Research Institute Nanchang330039China Jiujiang academy of Fishery sciences Jiujiang332000China School of Life sciences Nanchang UniversityNanchang330031China Qinghai Provincial Fishery Technology Extension Center Xining810012China Yunnan academy of Fishery sciences Kunming650111China Institute of Hydroecology Ministry of Water Resources and Chinese Academy of SciencesWuhan430079China Fisheries Institute Sichuan Academy of Agricultural SciencesChengdu611731China School of Life sciences Neijiang Normal UniversityNeijiang641100China School of Life sciences Southwest UniversityChongqing400715China Chongqing Fishery sciences Research Institute Chongqing401120China Guizhou Fisheries Research Institute Guiyang550025China College of Fisheries Huazhong Agricultural UniversityWuhan430072China Hubei Fisheries Science Research Institute Wuhan430070China Shaanxi Fisheries Research Institute Xi’an710086China Innovation academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan430077China nanjing Institute of Geography and Limnology Chinese Academy of SciencesNanjing210008China Central South Inventory and Planning Institute of State Forestry and Grassland Administration Changsha410014China

The Yangtze River is the mother river of *** promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries Resources and environment Investigation(2.17-2.2.)supported by the Ministry of Agriculture and Rural Affairs,*** carried out by 2. institutes and universities that located in the Yangtze River basin surveys the status of(1)fish species composition and spatial distribution,(2.current fish abundance,(3.endangered fishes,(4)Yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the Yangtze River mainstream and 10 of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,{2. River,Han River,Dongting lake and Poyang *** results showed that there were 443.fish species(belonging to 163.genus,3. families,and 18 orders)before 2.17,but only 3.1} fish species(including 15 new recorded exotic species)were recorded in the project of *** them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole Yangtze River *** is estimated that there were 886 million individuals weighing 12..8 million kg,merely equivalent to 2..3.of the resources in 1950s,3..9%of the resources in 1960s,or 58.7%of the resources in *** the new list of protected fishes that recorded in the Yangtze River system,only 15 of 2. were collected in this project of *** gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct

关键词： Fishes Yangtze finless porpoise Resources Aquatic ecosystem Fisheries Background investigation Yangtze river system

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Geochronology of recent lake sediments from Longgan lake,middle reach of the Yangtze River,influenced by disturbance of human activities

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Science china Earth sciences 2010年第8期53卷 1188-1194页

作者： wu yanhong LIU EnFeng BING HaiJian YANG XiangDong XUE Bin XIA WeiLan State key laboratory of {2. Science and {3. Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Institute of Mountain Hazards and environment Chinese Academy of SciencesChengdu 610041China Graduate University of chinese academy of sciences Beijing 100049China

The impacts of human activities in Longgan lake region on the distribution of 2.0Pb in lake sediment made it difficult to establish geochronological sequence. However, {2.al proxies recorded these human activities and could be used as time marker to check 2.0Pb dating results. Based on the analysis of 2.0Pbexc distribution in cores LS-1 and LGL-1, and in combination with the human activities records in grain-size and element concentration, the sedimentation rates in the upper layers of these two cores were determined to be 0.19 and 0.2. cm/a respectively. The MAR (mass accumulation rates) of these two cores demonstrated that natural condition, such as precipitation and runoffs, led to the variation of MAR before human disturbance, and human activities controlled the sedimentary processes afterwards, which obviously reduced the particles influx into the lakes. During 1940s when human activity had not changed the water system within the catchment, 2.0Pb activity was abnormally strong in lakes along middle to lower reaches of the Yangtze River, which might be attributed to less precipitation and can be used as a time marker for geochronological research.

关键词： 2.0Pb geochronology environmental index human activity Longgan lake

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高原深水湖泊抚仙湖溶解氧分层特征及驱动因素

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环境科学研究 2024年第5期37卷 1006-1014页

作者：张秀锦牛远吴亚丽王平段友爱余辉中国环境科学研究院湖泊生态环境研究所湖泊水污染治理与生态修复技术国家工程实验室北京100012 云南省生态环境监测中心云南昆明650034

深水湖泊特有的“表水层-温跃层-深水层”的热力学分层结构,决定了湖内溶解氧(DO)的垂直分布和混合交换,影响着湖内生态系统的健康.然而,目前对于深水湖泊耗氧与复氧过程及其驱动因素的研究还不够深入,尤其对高原深水湖泊的研究更为缺乏... 详细信息

深水湖泊特有的“表水层-温跃层-深水层”的热力学分层结构,决定了湖内溶解氧(DO)的垂直分布和混合交换,影响着湖内生态系统的健康.然而,目前对于深水湖泊耗氧与复氧过程及其驱动因素的研究还不够深入,尤其对高原深水湖泊的研究更为缺乏.为此,本研究于2.2.年1月-2.2.年2.进行了分层采样和逐月监测,探究了典型高原深水湖泊抚仙湖的溶解氧分层特征及驱动因素.结果表明:①抚仙湖热力学分层周期分为两期,即分层期和非分层期.分层期为3.下旬至11月上旬,混合期为11月下旬至3.上旬.②在湖泊热力学分层的驱动下,湖内DO垂直分层明显.表水层DO浓度年内变化范围为6.67~8.64 mg/L,而温跃层和深水层DO最低浓度分别可降至3.1.和1.2. mg/L.③抚仙湖不同水层DO浓度变化的驱动因素及效应占比不同.表水层DO受到水温、光合作用、大气复氧和气象条件的综合影响;温跃层DO主要受分层强度和浮游植物生命活动的影响;深水层DO主要受分层强度、有机质沉降分解、沉积物有机质分解的影响.研究显示,抚仙湖底层水体长期处于厌氧状态,由此带来的湖泊生境的改变以及底部营养盐释放的风险值得关注.

关键词：高原深水湖泊抚仙湖溶解氧(DO) 驱动因素混合模式富营养化

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Data Resource Profile:A Protocol of china National Diabetic Chronic Complications Study

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Biomedical and environmental sciences 2022年第7期35卷 633-640页

作者： hou Xu Hong wang Li Min CHEN Si Yu LIANG Ye Bei ZHANG Mei HUANG Zheng Jing CHEN Hong Li {2. Jing Zhu {2. Jing JIA Wei Ping Department of Endocrinology and Metabolism Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai Diabetes InstituteShanghai Key Laboratory of Diabetes MellitusShanghai Clinical Center for DiabetesShanghai Key Clinical Center for Metabolic DiseaseShanghai 200233China National Center for Chronic and Noncommunicable Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China Department of Endocrinology and Metabolism Suzhou Dushu Lake Hospital(Dushu Lake Hospital Affiliated to Soochow University)Suzhou 215000JiangsuChina Department of Endocrinology and Metabolism Shanghai General HospitalShanghai 200080China

Diabetes affects approximately 10.5%of adults worldwide,and its chronic complications lead to severely disabling sequelae and premature death,thus placing a heavy healthcare burden on both patients affected and society[1].china has experienced a dramatic increase in diabetes prevalence from 0.67%in 1980[2.to 12.8%in 2.18[3.and has approximately one-quarter of people with diabetes worldwide[1].It is therefore essential to understand the epidemiologic characteristics of the chronic complications and co-morbidities of diabetes,and the current status of diabetes management to guide planning for appropriate diabetes care and intervention for these complications and co-morbidities at the national level[4-7].

关键词： diabetes Chronic death

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洞庭湖湿地短尖薹草(Carex brevicuspis)种群克隆生长对泥沙淤积的适应

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湖泊科学 2024年第5期36卷 1470-1478,I0015页

作者：潘柏含邹雅邓正苗谢永宏侯志勇李旭曾静吴滔谢洪涛黎慧娟湖南师范大学生命科学学院长沙410081 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室洞庭湖湿地生态系统观测研究站长沙410125 湖南省益阳市林业局益阳413000 湖南鑫远环境科技股份有限公司湖南省环境保护入河湖湿地生态修复工程技术中心长沙410008

泥沙淤积是影响湿地植物生存和生长的重要因素。克隆植物是湿地生态系统的主要植物类型之一。在自然水文条件下,湿地克隆植物种群对不同淤积速率的响应研究相对较少。本研究以洞庭湖湿地优势克隆植物短尖薹草(Carex brevicuspis)为对象... 详细信息

泥沙淤积是影响湿地植物生存和生长的重要因素。克隆植物是湿地生态系统的主要植物类型之一。在自然水文条件下,湿地克隆植物种群对不同淤积速率的响应研究相对较少。本研究以洞庭湖湿地优势克隆植物短尖薹草(Carex brevicuspis)为对象,通过连续3.的野外控制实验,研究了不同淤积速率(0、2.4、6 cm/a,分别对应对照组,低、中和高淤积速率组)对湿地克隆植物种群的影响。结果表明:淤积速率对短尖薹草的种群密度影响显著,淤积处理的密度显著低于对照处理。随着淤积速率的增加,密度下降,地下/地上生物量比增加,高淤积速率下种群的密度最低,地下/地上生物量比最高。与对照处理相比,泥沙淤积促进了更多的短根(<10 cm)、长根茎(≥1 cm)和游击型克隆分株的形成,长根茎的长度随淤积速率的增加而增加。高淤积速率下的长根茎数量较低,但其根长最长,表明其克隆生长策略由密集型向游击型转变。由此可见,短尖薹草种群可通过对密度、生物量分配、根系长度和克隆生长策略的调节,有效地应对不同泥沙淤积速率的影响。

关键词：淤积速率湿地植物种群特征根系克隆生长

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Spatiotemporal dynamics of cell abundance,colony size and intracellular toxin concentrations of pelagic and benthic Microcystis in lake Caohai,china

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Journal of environmental sciences 2019年第10期31卷 184-196页

作者： Bing Feng Chunbo wang Xingqiang wu Cuicui Tian Meng Zhang Yingying Tian Bangding Xiao key laboratory of Algal Biology of{2. Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072China Jiangxi academy of environmental {2. Nanchang 330039 China Henan institute of technology Henan 453003 China

lake Caohai has experienced extensive Microcystis blooms in recent years,and to improve its water quality,the local government carried out a series of water control *** better understand the dynamics of both pelagic and benthic Microcystis and their characteristics in lake Caohai,we conducted a 1-year investigation from December 2.15to December 2.16 to gain a seasonal outlook on the distribution and dynamics of cell abundance,colony size and intracellular microcystins(MCs)of *** results indicated that the Microcystis bloom occupied primarily the northeastern region and then moved gradually from lakeshore to lake *** perennial southwesterly winds and the water inflow from northeast to southwest in lake Caohai determined the spatiotemporal distribution of pelagic *** Microcystis was mainly distributed in the northeastern region in summer,occupied the lake center in autumn and then occupied the southeastern region in winter,determined by the sedimentation of pelagic Microcystis and the death of benthic *** colonies(2.-60μm)overwintered more easily in both water column and *** concentrations of intracellular toxin of benthic Microcystis were observed to be significantly higher than those of pelagic *** might be because Microcystis synthesized large amount of MCs to acclimate to an unfavorable benthic *** knowledge on the dynamics of Microcystis expands our understanding of mechanisms underpinning the formation of Microcystis blooms.

关键词： Spatiotemporal dynamics Pelagic Microcystis Benthic Microcystis Cell abundance Colony size Intracellular MCs

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Characteristics of U-pattern distribution of high-concentration ^(2.0)Pb in surface air at central Guizhou,china

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chinese Science Bulletin 2005年第16期50卷 1750-1755页

作者： WAN Guojiang YANG Wei wang Shilu WAN Enyuan wu Fengchang S.N.LEE wang Changsheng HUANG Ronggui State key laboratory of {2.al Geochemistry ChineseAcademy of Sciences Guiyang 550002 China environmental Measurements laboratory Department of Homeland Security NY 10014-4811 USA

A better understanding of the variation of 2.0Pb concentrations in the surface air is the key to trace lake {2. and catchment erosion, to establish and vali-date the global diffusion model of contaminants, and to as-sess the impact of natural radiation on the ecological system. Basing on the study progresses of the {2., the at-mospheric model and the unique environmental background in the Yunnan-Guizhou Plateau, and starting from December 2., 2.01, we made use of a 500 NE Type aerosol sampler to collect filter samples, once a week in the past consecutive two years, in the surface air at Mt. Guanfeng, Guiyang City, china. Synchronous detailed γ -energy spectrometric obser-vations of 2.0Pb concentrations at both chinese and U.S. laboratories have shown that the average monthly 2.0Pb concentration displays a regular U-patterns distribution of annual variations, with high values appearing in winter and low values in late spring and summer. The average annual 2.0Pb concentrations are estimated to be 2.77±0.63.mBq/m3. about 4 times the average maximum concentrations reported from quite a number of monitoring stations throughout the world. The possible factors affecting the sources of 2.0Pb in the surface air in the central part of Guizhou Province are: Release of 2.2.n from the U-Ra series enriched in the soils; chemical weathering of carbonate rocks; the exploitation, processing and utilization of coal and phosphorous resources. The principal factor controlling the high 2.0Pb concentrations in the surface air in the central Guizhou and their annual U-pattern distribution is the release of 2.2.n. The average monthly 2.0Pb concentrations show a good negative power- function relationship with increasing precipitation and also show a good negative linear-function relationship with the rise of air temperature in month grouping. Group No.1 (June to November) reflects a relatively low release of 2.2.n from soils in relatively high temperature seasons; Group

关键词：表面空气铅浓度 U模式分布中国贵州

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