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Vegetation dynamics and climate variability over the past 2.00 years inferred from Son Kul marsh in the western Tianshan Mountains

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Journal of Mountain Science 2021年第5期18卷 1246-1255页

作者： ZHANG Dong-liang LI Yao-ming LI Kai-hui MA Xue-xi YANG Yun-peng state key {2. of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Research Center for Ecology and environment of Central Asia Chinese Academy of SciencesUrumqi 830011China state key {2. of {2. and quaternary geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China College of environment and Planning Henan UniversityKaifeng 475004China key laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions(Ministry of Education) Henan UniversityKaifeng 475004China

A pollen study was conducted on an alpine marsh sediment in the Son Kul Basin and was allowed to reconstruct changes in vegetation dynamics and climatic information in the western Tianshan Mountains during the past 2.00 *** diagram reveals that regional vegetation is dominated by alpine meadow in the past 2.00 years,being similar with modern vegetation components in the *** Artemisia/Chenopodiaceae-indicated moisture exhibits a warm-dry Roman Warm Period(RWP,~0-~500 AD),a cold-dry Dark Ages Cold Period(DACP,~500-~800 AD),a warm-wet Medieval Warm Period(MWP,~800-~1350 AD),a cold-dry Little Ice Age(LIA,~1350-~1850 AD)and a warm-dry Current Warm Period(CWP,since~1850 AD).Our pollen-based moisture reconstructions are supported by other nearby moisture *** with other pollen data in the western Tianshan Mountains,we found that the vegetation was relatively stable before~1650-~1750 AD and the anthropogenic activities obviously intensified afterwards(especially at the middle-elevation sites).Further work involving more and higher-resolution palaeovegetation records would contribute to fully understand the information on the complex links between environmental,climatic and anthropogenic changes in the western Tianshan Mountains.

关键词： Pollen analysis Past 2.00 years Son Kul marsh Kyrgyzstan Central Asia

Research on the relationship between site function and environment at the site of Zhongba,Chongqing City,China

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chinese Science Bulletin 2008年第S1期53卷 58-73页

作者： SUN ZhiBin institute of Cultural Relics and Archaeology of Sichuan Province,Chengdu 610041,China 1. institute of Cultural Relics and Archaeology of Sichuan Province Chengdu 610041 China

The Zhongba site has been demonstrated to be a location of salt production based on multi-disciplinary research including salt archaeology,environmental archaeology,zooarchaeology,paleobotany,and other natural science *** continuity of salt production from the Han Dynasty to the present day as understood primarily from ancient texts can now be traced back to even earlier times. Based on the characteristics of cultural layer deposits,features,and artifacts,Zhongba can be clearly distinguished from known settlements,and from bronze,iron,pottery and porcelain *** to various natural science examinations,the major impurities in local salt brine are also found in floor features,brine troughs,and rounded bottom pots at the site even though NaCl itself was not *** traces were left over from the salt production process rather than being naturally *** and its constituent features and artifacts share many common characters with other salt production sites around the ***,the Zhongba site can be confidently identified as a salt production site where activity continued for several thousand *** formation of the site cannot be separated from salt production,and it is also highly related to its natural environment.

关键词： Zhongba site function salt production environmental relationships

High-Resolution Geochemical Records in the Inner Shelf Mud Wedge of the East China Sea and Their Indication to the Holocene Monsoon Climatic Changes and Events

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Journal of Ocean University of China 2021年第6期20卷 1409-1418页

作者： WANG Longsheng ZHOU Bin ZHENG Bang WANG Ke MEI xi WANG Qing WANG xiaohui ZHENG Hongbo Coast institute of Ludong University Yantai 264025China School of earth sciences and Engineering Nanjing UniversityNanjing 210023China key laboratory of Coastal {2.al Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Yantai 264003China Department of earth and Planetary Science Graduate School of ScienceThe University of TokyoTokyo 1130033Japan key laboratory of Gas Hydrate Ministry of Natural ResourcesQingdao Institute of Marine GeologyQingdao 266071China Research Center for earth System Science Yunnan UniversityKunming 650091China state key {2. of {2. and quaternary geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China

The inner shelf mud wedge(ISMW)located in the East China Sea(ECS)is the fine-grained sedimentary area with high sedimentation rate and has provided an ideal study area for understanding the East Asian Summer Monsoon(EASM)evolution during the *** this paper,we presented the high-resolution geochemical data of the sediments from the core MD06-3040 in the ISMW of the ECS determined by X-ray fluorescence core scanning(XRF-CS)analysis,a high-resolution,continuous,and multielement *** and factor analysis results reveal that the variations of elemental compositions(Al,Si,K,Ti,Fe),the elemental ratios of Al/Zr,Ca/Ti and Rb/Sr,and the factor scores(F1 are correlated with the changes of the EASM during the period of 6000–1300 cal yr *** higher values of geochemical compositions indicating the terrigenous inputs implied the intensification of anthropogenic activities after 1300 cal yr ***,the significant decrease of most geochemical compositions and the F1 factor scores during 4500–3500 cal yr BP and 1700–1500 cal yr BP,within the dating errors,coincided with the weak EASM events(presumably drought and cold events).The spectral analysis results of K concentrations,Al/Zr ratios and F1 factor scores show the millennial and centennial climatic fluctuations,which are consistent with other marine sedimentary records in the adjacent *** the findings show that the geochemical compositions of sediments from core MD06-3040 are influenced by the EASM evolution,the variable El Niño/Southern Oscillation(ENSO)and the local oceanic thermohaline circulation(e.g.,Kuroshio Current).These results are greatly helpful in uncovering the forcing mechanism of the monsoonal climate in the east China over the Holocene and also contribute to the understanding of EASM variability.

关键词： Holocene climatic event East Asian Summer Monsoon XRF core scanning inner shelf mud wedge

南黄海SYS90-1A孔第四纪沉积物磁性地层学研究

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海洋地质与第四纪地质 2024年第2期44卷 97-109页

作者：陆凯孙军李广雪杨慧良王忠蕾梅西陈晓辉祁江豪朱晓青强小科中国海洋大学海洋地球科学学院青岛266100 中国地质调查局青岛海洋地质研究所青岛266237 崂山实验室海洋矿产资源评价与探测技术功能实验室青岛266237 中国地质大学(北京)海洋学院北京100083 黄土与第四纪地质国家重点实验室中国科学院地球环境研究所西安210008

可靠的年代地层框架是开展南黄海地区第四纪环境演变研究的基础。目前南黄海南部地区缺乏可靠年代学控制的长序列钻孔。通过对南黄海南部SYS90-1A孔(孔深90.1 m)沉积物开展详细的磁性地层学研究,并结合AMS14C测年结果及区域已有磁性地... 详细信息

可靠的年代地层框架是开展南黄海地区第四纪环境演变研究的基础。目前南黄海南部地区缺乏可靠年代学控制的长序列钻孔。通过对南黄海南部SYS90-1A孔(孔深90.1 m)沉积物开展详细的磁性地层学研究,并结合AMS14C测年结果及区域已有磁性地层学结果,建立南黄海南部地区第四纪沉积物年代地层框架。结果显示,SYS90-1A孔岩芯记录了从布容(Brunhes)正极性时至松山(Matuyama)负极性时上部,包括Kamikatsura和Santa Rosa地磁漂移事件。早、中更新世界线即布容正极性时与松山负极性时界线(B/M界线)深度位于74.2.m,Kamikatsura和Santa Rosa地磁漂移事件深度分别位于79.75~82.47 m和85.2.~87.74 m。根据Kamikatsura和Santa Rosa地磁漂移事件的年代控制点和平均沉积速率,推算钻孔底部年龄为0.96 Ma。南黄海SYS90-1A孔早更新世晚期的沉积速率约为8.66 cm/ka,中更新世以来的沉积速率约为9.5 cm/ka,而全新世以来的沉积速率为12.8 cm/ka,沉积速率自早更新世晚期以来呈增加趋势。这一结果不仅为南黄海南部第四纪沉积物研究提供了有效的年代学约束,而且为南黄海地区第四纪地层划分和对比、沉积环境与气候变化、物源示踪等研究提供了重要的时间标尺。

关键词：古地磁学沉积速率第四纪中部泥质区南黄海

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土壤生态系统微生物多样性技术研究进展

地球与环境 2018年第2期46卷 204-209页

作者：陈慧清李晓晨于学峰马瑜柯杨朱海云薛静陕西师范大学西安710119 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室西安710061 陕西省微生物研究所西安710043

土壤微生物多样性主要研究土壤环境中微生物种群的类别、丰度、分布、结构变化及微生物群落功能的多样性,是土壤生物多样性研究的主体部分。19世纪末,传统的微生物分离培养方法应用于土壤微生物多样性解析。至2.世纪70年代,建立了以磷... 详细信息

土壤微生物多样性主要研究土壤环境中微生物种群的类别、丰度、分布、结构变化及微生物群落功能的多样性,是土壤生物多样性研究的主体部分。19世纪末,传统的微生物分离培养方法应用于土壤微生物多样性解析。至2.世纪70年代,建立了以磷脂脂肪酸图谱分析法（PLFA）和BIOLOG微量分析法为代表的对土壤微生物群落多样性评价的生物化学方法。2.世纪90年代后期,随着分子生物学技术的快速发展,建立了变性梯度凝胶电泳（DGGE）、末端限制性片段长度多样性（TRFLP）、克隆文库和高通量测序等土壤微生物多样性研究方法。本文综述了土壤微生物多样性研究技术的原理、进展,并对不同技术的优缺点及应用进行探讨,并对相关领域研究提出思考。

关键词：微生物多样性土壤生态系统微生物群落研究进展

The Remagnetization of Marine Carbonate Rocks of the Late Ordovician in Pingliang Section,Southwest Ordos(China)

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Acta Geologica Sinica(English Edition) 2019年第S01期93卷 132-134页

作者： LUO Junhua DAI Shuang Mark DEKKERS WANG Weiguo QIANG xiaoke QIANG Lei TIAN Chao xi Haiyu Wout KRIJISMAN School of earth sciences and {2. {2. of Mineral Resources in Western China(Gansu Province) Lanzhou UniversityLanzhou 730000China key laboratory of Western China’s {2.al Systems Ministry of Education of China&College of Resources and EnvironmentLanzhou UniversityGansu 730000China Paleomagnetic laboratory’Fort Hoofddijk’ Utrecht University3584 CD UtrechtThe Netherlands Lab of Coast and Ocean geology Third Institute of OceanographyState Oceanic AdministrationXiamen361005China state key {2. of {2. and quaternary geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710075China

The natural remnant magnetization(NRM)of carbonate rocks in particular must be understood for the construction of a meaningful Paleozoic geomagnetic polarity time *** would enable evaluating geomagnetic features(*** f... 详细信息

关键词： remagnetization carbonate rocks Ordovician Southwest Ordos

The Ordovician Magnetostratigraphy and Cyclostratigraphy:A Review

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Acta Geologica Sinica(English Edition) 2019年第S01期93卷 94-97页

作者： DAI Shuang LUO Junhua Mark DEKKERS WANG Weiguo QIANG xiaoke WU Huaichun QIANG Lei TIAN Chao xi Haiyu Wout KRIJISMAN School of earth sciences and {2. {2. of Mineral Resources in Western China(Gansu Province) Lanzhou UniversityLanzhou 730000China key laboratory of Western China’s {2.al Systems Ministry of Education of China&College of Resources and EnvironmentLanzhou UniversityLanzhouGansu 730000China Paleomagnetic laboratory’Fort Hoofddijk’ Utrecht University3584 CD UtrechtThe Netherlands Lab of Coast and Ocean geology Third Institute of OceanographyState Oceanic AdministrationXiamen361005China state key {2. of {2. and quaternary geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710075China state key {2. of Bio{2. and environmental {2. and School of Ocean sciences China University of GeosciencesBeijing 100083China

The study of magnetostratigraphy and cyclostratigraphy in the last two decades has provided a great deal of opportunities to improve the geologic time *** Cenozoic and Mesozoic geologic timescale have been well calibrated(Gradstein et al..2.12.Ogg et al,2.12.Cohen et al.,2.18).However,for the Paleozoic era the uncertainty over boundary ages are still very large.

关键词： magnetostratigraphy geomagnetic polarity timescale cyclostratigraphy geologic timescale Ordovician

芍药苷对PM2.5诱导BEAS-2.细胞损害的保护作用

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南方医科大学学报 2018年第2期38卷 168-173页

作者：吴晓芳王丽云易建华雷剑奥宇宏李建军韩晶西安交通大学医学部公共卫生学院陕西西安710061 西北妇女儿童医院陕西西安710000 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室陕西西安710075

目的探索芍药苷对PM2.5诱导人支气管上皮细胞(BEAS-2.细胞)损害的保护作用及其机制。方法采用析因设计,分别利用MTT法,TBA法及化学荧光法,测定不同剂量芍药苷对PM2.5染毒所致BEAS-2.细胞生长抑制,细胞培养上清中丙二醛(MDA)及细胞内活性... 详细信息

目的探索芍药苷对PM2.5诱导人支气管上皮细胞(BEAS-2.细胞)损害的保护作用及其机制。方法采用析因设计,分别利用MTT法,TBA法及化学荧光法,测定不同剂量芍药苷对PM2.5染毒所致BEAS-2.细胞生长抑制,细胞培养上清中丙二醛(MDA)及细胞内活性氧(ROS)的含量的影响。结果随着PM2.5干预浓度水平的增高,细胞存活率显著性降低(P2.5诱导BEAS-2.细胞存活率下降的幅度明显降低(P0.05);同时发现PM2.5染毒可致细胞培养上清中MDA,细胞内ROS含量均显著增高(P2.5所致BEAS-2.细胞的生长抑制有明显的保护作用,其机制可能与芍药苷抗氧化作用有关。

关键词：芍药苷 PM2.5 BEAS-2.细胞抗氧化

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辽东湾北部钻孔磁性地层年代框架及地质意义

第四纪研究 2020年第3期40卷 616-632页

作者：王忠蕾郑洪波梅西孟祥君强小科南京师范大学地理科学学院江苏南京210023 中国地质调查局青岛海洋地质研究所山东青岛266071 云南大学地球系统科学研究中心云南昆明650091 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室陕西西安710061

辽东湾地属渤海,其沉积历史和特征,是揭示渤海海域晚新生代以来构造演化与地理格局形成过程的重要窗口。目前该区缺少精确年代学控制的长序列研究钻孔。文章基于磁性地层学方法,结合粒度分析、AMS 14C测年和光释光测年数据,建立了该区北... 详细信息

辽东湾地属渤海,其沉积历史和特征,是揭示渤海海域晚新生代以来构造演化与地理格局形成过程的重要窗口。目前该区缺少精确年代学控制的长序列研究钻孔。文章基于磁性地层学方法,结合粒度分析、AMS 14C测年和光释光测年数据,建立了该区北部JXC-1孔和YKC-2.的年代地层框架。JXC-1孔地理坐标为40°2.'43.38″N,12.°03'2..37″E,水深约2. m,进尺70.3 m,取芯率89.2.;YKC-2.地理坐标为40°2.'53.95″N,12.°36'30.2.″E,水深约14 m,进尺70.1 m,取芯率85.3%。研究结果显示:JXC-1孔底界年龄为1.2.Ma,YKC-2.底界年龄为0.7 Ma。根据沉积速率特征,JXC-1孔可分为2.阶段:阶段Ⅰ年龄为0~0.78 Ma,埋深0~45.18 m,沉积物以粉砂、细砂为主,位于布容正极性时(Brunhes),记录了Mono Lake、Levantine-BiwaⅢ和Calabrian RidgeⅡ等极性事件;阶段Ⅱ年龄为0.78~1.2. Ma,埋深45.18~70.30 m,沉积物以粉砂为主,位于松山负极性时(Matuyama),贾拉米洛正极性亚时(Jaramillo)埋深为61.6~66.2.m。YKC-2.主要位于布容正极性时(Brunhes)上部,包括Gothenburg、Blake等极性事件。JXC-1孔的布容松山倒转边界(MBB)位于45.18 m,与渤海及周边其他钻孔存在较大差别,YKC-2.则未打穿MBB。通过不同构造单元沉积记录和新构造运动响应对比,发现辽东湾北部晚更新世以来沉积厚度存在"东厚西薄"的模式。整个渤海及周边地区沉积相对连续,沉积厚度呈现以渤中坳陷为中心向四周减薄的特征。这表明,在新近纪构造基底控制的基础上,受郯庐断裂晚更新世以来的活动性影响,叠加了区域新构造运动,二者共同控制了区域内沉积厚度差异。这一研究深化了该区构造及沉积演化模式。

关键词：辽东湾北部磁性地层学年龄框架布容正极性时沉积厚度差异