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Ice sheet controls on fine-grained deposition at the southern Mendeleev Ridge since the penultimate interglacial

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Acta Oceanologica Sinica 2020年第9期39卷 86-95页

作者： Liming Ye xiaoguo yu Weiyan Zhang Rong Wang Key Laboratory of Submarine Geosciences Ministry of Natural ResourcesHangzhou 310012China Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China

Clay minerals deposited at the southern Mendeleev Ridge in the Arctic Ocean have a unique provenance,which can be used to reconstruct changes in the local sedimentary *** show that sediments in core ARC7-E23 record high-frequency changes in clay minerals since the penultimate *** clay minerals,grain size,and ice-rafted debris indicate the extent of the East Siberia Ice Sheet(ESIS).During the glacial periods of Marine Isotope Stage 2(MIS2)and MIS4,the southern Mendeleev Ridge was likely covered by an ESIS-extended ice shelf,blocking almost all sediment input from the Canadian Arctic and Laptev Sea,but allowing transport of fine-grained sediments from the East Siberian and Chukchi Sea *** ESIS retreat,the Beaufort Gyre and Transpolar Drift became the primary transport mechanism for the distally sourced *** conditions in MIS3 enhanced both the oceanic circulation and sediment transport.

关键词： Arctic Ocean Mendeleev Ridge East Siberian Ice Sheet clay minerals

Sedimentary records of eutrophication in the Changjiang Estuary upwelling area over last 100 a

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Acta Oceanologica Sinica 2008年第6期27卷 49-61页

作者： FENG Xuwen JING Xianglong yu xiaoguo LI Hongliang CHEN Jianfang QIAN Jiangchu Geology Science Department Zhejiang University Hangzhou 310027 China Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China Laboratory of Submarine Geosciences of State Oceanic Administration Second Institute Oceanography State Oceanic Adminis-tration Hangzhou 310012 China Laboratory of Marine Ecosystem and Biogeochemistry of State Oceanic Administration Second Institute Oceanography StateOceanic Administration Hangzhou 310012 China

The upwelling area in the Changjiang Estuary was selected to collect the core, where the red tide occurred frequently and hypoxic existed. The total organic carbon （TOC）, total nitrogen （TN）, biogenic silica （BSi） and stable organic carbon isotopic ratios（δ13 Corg） were determined on the 210pb-dated sediment core. The concentrations of TOC, TN, BSi as well as their sedimentation fluxes have in- creased to some extent since the 1970s. TOC and TN fluxes increased about 45%, 36% respectively. The average δ13 Coorg value in the core was -23.67 ×10^-3 which remained nearly constant before the 20 century. The δ13 Corg values increased after the 1900s, two marked increases were observed from the 1950s and the 1970s. A simple δ13 Cors model was used to estimate the contribution of terrigenous and marine organic matter inputs for the sediment, which indicated the increase in accumulation since the 1970s has been almost exclusively marine. The increasing of marine organic matter accumulation （TOC, TN and BSi） was corresponding with the increasing of fertilizer consumption and the NO3-N budgets from the Changjiang River. The riverine runoff of fertilizers and nutrients stimulated the algae blooming. Enhanced primary production resulted in an enrichment of organic matter in the sediment. These data support the hypothesis that anthropogenic nutrient loading has been a significant factor on the eutrophication in the Changjiang Estuary.

关键词： Changjiang Estuary total organic carbon total nitrogen biogenic silica stable carbon isotopes eutrophication

Grain size composition and transport of sedimentary organic carbon in the Changjiang River(Yangtze River) Estuary and Hangzhou Bay and their adjacent waters

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Acta Oceanologica Sinica 2015年第10期34卷 46-56页

作者： ZHANG Weiyan JIN Haiyan YAO Xuying JI Zhongqiang ZHANG Xiaoyu yu xiaoguo ZHANG Fuyuan GAO Aigen Key Laboratory of Submarine Geosciences State Oceanic Administration Second Institute of Oceanography State Oceanic Administration Key Laboratory of Marine Ecosystem and Biogeochemistry State Oceanic Administration Department of Earth Sciences Zhejiang University

Surface sediments from the Changjiang River （Yangtze River） Estuary, Hangzhou Bay, and their adjacent waters were analyzed for their grain size distribution, organic carbon （OC） concentration, and stable carbon isotope composition （δ13C）. Based on this analysis, about 36 surface sediment samples were selected from various environments and separated into sand （〉0.250 ram, 0.125-0.250 ram, 0.063-0.125 mm） and silt （0.025-0.063 mm） fractions by wet-sieving fractionation methods, and further into silt- （0.004-0.025 mm） and clay-sized （〈0.004 mm） fractions by centrifugal fractionation. Sediments of six grain size categories were analyzed for their OC and 613C contents to explore the grain size composition and transport paths of sedimentary OC in the study area. From fine to coarse fractions, the OC content was 1.18%, 0.51%, 0.46%, 0.42%, 0.99%, and 0.48%, respectively, while the δ13C was -21.64‰, -22.03‰, -22.52‰, -22.46‰, -22.36‰, and -22.28%0, respectively. In each size category, the OC contribution was 42.96%, 26.06%, 9.82%, 5.75%, 7.09%, and 8.33%, respectively. The OC content in clay and fine silt fractions （〈0.025 ram） was about 69.02%. High OC concentrations were mainly found in offshore modern sediments in the northeast of the Changjiang River Estuary, in modern sediments in the lower estuary of the Changjiang River and Hangzhou Bay, and in Cyclonic Eddy modern sediments to the southwest of the Cheju Island. Integrating the distribution of terrestrial OC content of each grain size category with the δ13C of the bulk sediment indicated that the terrestrial organic material in the Changjiang River Estuary was transported seaward and dispersed to the Cyclonic Eddy modern sediments to the southwest of the Cheju Island via two pathways： one was a result of the Changjiang River Diluted Water （CDW） northeastward extending branch driven by the North Jiangsu Coastal Current and the Yellow Sea Coastal Current, while the other one was the result of the CDW southward extendin

关键词： Changjiang River (Yangtze River) Estuary Hangzhou Bay grain size composition organic carbon,material transport

晚更新世北极楚克奇陆架边缘有机碳的差异埋藏

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地球科学 2024年第9期49卷 3387-3398页

作者：宋赛叶黎明于晓果吴自银张永战章伟艳李中乔季仲强金海燕张泳聪杨映南京大学地理与海洋科学学院海岸与海岛开发教育部重点实验室江苏南京210023 自然资源部海底科学重点实验室自然资源部第二海洋研究所浙江杭州310012 自然资源部海洋生态系统动力学重点实验室自然资源部第二海洋研究所浙江杭州310012

有机碳埋藏是评价北冰洋碳封存能力的关键因素,但其在轨道时间尺度上的埋藏特征目前还存在很大的争论.通过分析楚克奇陆架边缘M04孔和周边表层沉积物中总有机碳、稳定碳同位素和生物标记物等指标,进一步探讨了晚更新世楚克奇陆架边缘有... 详细信息

有机碳埋藏是评价北冰洋碳封存能力的关键因素,但其在轨道时间尺度上的埋藏特征目前还存在很大的争论.通过分析楚克奇陆架边缘M04孔和周边表层沉积物中总有机碳、稳定碳同位素和生物标记物等指标,进一步探讨了晚更新世楚克奇陆架边缘有机碳的组成、来源、埋藏速率及其与周边冰盖的协同演化.结果表明,陆源有机碳是楚克奇陆架边缘有机碳埋藏的主体,且在冰期‒间冰期旋回中表现出了显著的差异性,间冰期(MIS1和MIS3)埋藏速率低,冰期(MIS4和MIS2)埋藏速率急骤升高.结合楚克奇陆架边缘的地貌特征和沉积环境,东西伯利亚冰盖(ESIS)的扩张和冰下排水系统的输运可能是陆架有机碳二次搬运、并在陆架边缘高速埋藏的主要控制因素.M04孔的沉积记录为梳理北冰洋有机碳的埋藏特征提供了新的视角,进一步揭示了高速沉积区有机碳埋藏的驱动机制,有助于客观评价北冰洋碳埋藏对全球碳封存的推动作用,但仍需要更多、特别是来自北极加拿大一侧的数据才能有效刻画北冰洋碳埋藏与气候转型之间的耦合关系.

关键词：北冰洋楚克奇陆架边缘有机碳碳埋藏碳封存冰期晚更新世.

The composition and origination of particles from surface water in the Chukchi Sea, Arctic Ocean

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Advances in Polar Science 2014年第3期25卷 147-154页

作者： yu xiaoguo LEI Jijiang YAO Xuying ZHU Jihao JIN Xiaobing Key Laboratory of Submarine Geosciences Second Institute of Oceanography SOA

Suspended particle samples were collected at 11 stations on the shelf and slope regions of the Chukchi Sea and the central Arctic Ocean during the fifth Chinese National Arctic Research Expedition （summer 2012）. The particle concentration, total organic carbon （TOC）, total nitrogen （TN） and the isotopic composition of the samples were analyzed. The suspended particle concentration varied between 0.56 and 4.01 ***; the samples collected from the sea ice margin have higher concentrations. The organic matter content is higher in the shelf area （TOC： 9.78%-20.24%; TN： 0.91‰-2.31%）, and exhibits heavier isotopic compositions （δ13C： -23.29‰ to -26.33‰ PDB; δ15N： 6.14‰-7.78‰）, indicating that the organic matter is mostly marine in origin with some terrigenous input. In the slope and the central Arctic Ocean, the organic matter content is lower （TOC： 8.06%- 8.96%; TN： 0.46%-0.72%）, except for one sample （SR15）, and has lighter isotopic compositions （δ13C： -26.93‰ to -27.78‰ PDB; δ15N： 4.13‰-4.84‰）. This indicates that the organic matter is mostly terrestrially-derived in these regions. The extremely high amount of terrigenous organic matter （TOC： 27.94%; TN： 1.16%; δ13C： -27.43‰ PDB; δ15N： 3.81‰） implies that it was carried by transpolar currents from the East Siberian Sea. Material, including sea ice algae, carried by sea ice are the primary source for particles in the sea ice margins. Sea ice melting released a substantial amount of biomass into the shelf, but a large amount of detrital and clay minerals in the slope and the central Arctic Ocean.

关键词： Chukchi Sea particles organic matter stable isotopes

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崖13-1气田油气混合特征研究

石油勘探与开发 2000年第1期27卷 19-22页

作者：傅宁于晓果中国海洋石油勘探开发研究中心

崖131气田位于莺歌海盆地和琼东南盆地交界处,其气源长期存在争论。采用天然气GS/MS分析新技术,根据该气田天然气生物标志化合物、有机包裹体生物标志化合物、储集层包裹体温度、油气轻烃组成及碳同位素等资料,对其天然气的气源和混合... 详细信息

崖131气田位于莺歌海盆地和琼东南盆地交界处,其气源长期存在争论。采用天然气GS/MS分析新技术,根据该气田天然气生物标志化合物、有机包裹体生物标志化合物、储集层包裹体温度、油气轻烃组成及碳同位素等资料,对其天然气的气源和混合作用进行综合研究,结果表明:该气田的天然气为典型的混合气,由不同类型有机质、不同热演化程度气源岩生成的天然气(煤成气和高成熟—过成熟海相成因气,以海相成因气为主)混合而成,北区块是Ⅲ型、Ⅱ型干酪根成因的混合气藏,南区块主要是Ⅱ型干酪根成因的气藏。主力气源岩是崖南凹陷沉积中心下第三系崖城组、陵水组的浅海相泥岩,生烃母质具有Ⅱ型干酪根特征。该气田的凝析油为煤成油,在蒸发分馏作用下形成;琼东南盆地存在切穿多层烃源岩的深断裂,形成局部低压带,为产生蒸发分馏作用提供了重要地质背景。图5表3参6(傅宁摘)

关键词：气田油气混合特征研究油气成因

Overview of the 9th Chinese National Arctic Research Expedition

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Atmospheric and Oceanic Science Letters 2020年第1期13卷 1-7页

作者： WEI Zexun CHEN Hongxia LEI Ruibo yu xiaoguo ZHANG Tao LIN Lina TIAN Zhongxiang ZHUANG Yanpei LI Tao yuAN Zhuoli First Institute of Oceanography Ministry of Natural ResourcesQingdaoChina Polar Research Institute of China ShanghaiChina Second Institute of Oceanography Ministry of Natural ResourcesHangzhouChina National Marine Environmental Forecasting Center BeijingChina College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdaoChina

The 9th Chinese National Arctic Research Expedition was carried out from 20 July to 26 September 2018. The expedition was successful in undertaking multidisciplinary comprehensive surveys in the fields of physical oceanography, marine meteorology, sea ice, marine chemistry,marine biology, marine ecology, geology, and geophysics in the Bering Sea, Chukchi Sea, Chukchi Plateau, Mendeleev Ridge, and Canada Basin. This paper gives an overview of the main achievements of this expedition and highlights the scientific achievements.

关键词： Chinese National Arctic Research Expedition Chukchi Sea Canada Basin Bering Sea Arctic Ocean

Analysis on Genetic Diversity of 40 Flowering Cherry Cultivars and Construction of Molecular ID Based on SSR Markers

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Agricultural Sciences 2024年第2期15卷 256-273页

作者： Chaoren Nie xiaoguo Xu Xiaoqin Zhang Hongbing Sun Jingya yu Wensheng Xia Wuhan Institute of Landscape Architecture Wuhan China Wuhan Landscape Ecology Group Co. Ltd. Wuhan China

Studying on the genetic diversity and genetic relationship of flowering cherry cultivars is extremely important for germplasm conservation, cultivar identification and breeding. Flowering cherry is widely cultivated as an important woody ornamental plant in worldwide, especially Japan, China. However, owning to the morphological similarity, many cultivars are distinguished hardly in non-flowering season. Here, we evaluated the genetic diversity and genetic relationship of 40 flowering cherry cultivars, which are mainly cultivated in China. We selected 13 polymorphicprimers to amplify to allele fragments with fluorescent-labeled capillary electrophoresis technology. The population structure analysis results show that these cultivars could be divided into 4 subpopulations. At the population level, Na and Ne were 6.062, 4.326, respectively. Ho and He were 0.458 and 0.670, respectively. The Shannon’s information index (I) was 1.417. The Pop3, which originated from P. serrulata, had the highest Ho, He, and I among the 4 subpopulations. AMOVA showed that only 4% of genetic variation came from populations, the 39% variation came from individuals and 57% (p < 0.05) came from intra-individuals. 5 polymorphic SSR primers were selected to construct molecular ID code system of these cultivars. This analysis on the genetic diversity and relationship of the 40 flowering cherry cultivars will help to insight into the genetic background, relationship of these flowering cherry cultivars and promote to identify similar cultivars.

关键词： Flowering Cherry SSR Genetic Relationship Molecular ID Identifying Cultivars

南海北部甲烷渗漏系统环境变化的碳、氧同位素记录

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地球科学（中国地质大学学报） 2016年第7期41卷 1206-1215页

作者：杨克红于晓果初凤友董彦辉国家海洋局第二海洋研究所浙江杭州310012 国家海洋局海底科学重点实验室浙江杭州310012

冷泉碳酸盐岩记录了甲烷渗漏活动和流体组分随时间的变化过程,对示踪冷泉系统沉积环境变化具有非常重要的意义.对南海北部获取的冷泉碳酸盐岩进行了碳、氧同位素剖面研究,并对南海北部冷泉碳酸盐岩的碳、氧同位素变化范围进行了统计分析... 详细信息

冷泉碳酸盐岩记录了甲烷渗漏活动和流体组分随时间的变化过程,对示踪冷泉系统沉积环境变化具有非常重要的意义.对南海北部获取的冷泉碳酸盐岩进行了碳、氧同位素剖面研究,并对南海北部冷泉碳酸盐岩的碳、氧同位素变化范围进行了统计分析.研究结果及已发表的δ13 C和δ18 O剖面数据表明,南海北部冷泉碳酸盐岩剖面的δ13 C和δ18 O之间普遍存在相关性,相关系数R2最高可达0.933 1.经统计,南海北部冷泉碳酸盐岩样品δ13 C和δ18 O均具有较大的变化范围,其最大变化分别为34.50×10-3和5.89%(Vienna Pee Dee Belemnite,V-PDB).冷泉碳酸盐岩δ13 C和δ18 O的相关性特征可能指示了初始流体的变化、后期矿物形成/重结晶作用、渗漏系统较为复杂或者成岩作用等环境变化信息.对不同碳酸盐岩样品来说,δ13 C的变化主要由海水的参与程度决定,而δ18 O的变化可能与温度和Mg元素参与方解石沉淀的程度有关.

关键词：同位素甲烷渗漏冷泉碳酸盐岩南海北部环境地质