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An N-shape thermal front in the western south yellow sea in winter

Chinese Journal of Oceanology and Limnology 2009年第4期27卷 898-906页

作者：王凡刘传玉 Institute of Oceanology Chinese Academy of Sciences Key Laboratory of Circulation and Waves Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

An N-shape thermal front in the western south yellow sea （YS） in winter was detected using Advanced Very High Resolution Radiation （AVHRR） sea Surface Temperature data and in-situ observations with a merged front-detecting method. The front, which exists from late October through early March, consists of western and eastern wings extending roughly along the northeast-southwest isobaths with a southeastward middle segment across the 20--50 m isobaths. There are north and south inflexions connecting the middle segment with the western and eastern wings, respectively. The middle segment gradually moves southwestward from November through February with its length increasing from 62 km to 107 km and the southern inflexion moving from 36.2°N to 35.3°N. A cold tongue is found to coexist with the N-shape front, and is carried by the coastal jet penetrating southward from the tip of the Shandong Peninsula into the western south YS as revealed by a numerical simulation. After departing from the coast, the jet flows as an anti-cyclonic recirculation below 10 m depth, trapping warmer water originally carried by the compensating yellow sea Warm Current （YSWC）. A northwestward fowing branch of the YSWC is also found on the lowest level south of the front. The N-shape front initially forms between the cold tongue and warm water involved in the subsurface anti-cyclonical recirculation and extends upwards to the surface through vertical advection and mixing. Correlation analyses reveal that northerly and easterly winds tend to be favorable to the formation and extension of the N-shape front probably through strengthening of the coastal jet and shifting the YSWC pathway eastward, respectively.

关键词： N-shape front south yellow sea coastal jet yellow sea Warm Current (YSWC)

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Spatiotemporal variability of physical-biogeochemical processes and intrinsic correlations in the semi-enclosed south yellow sea

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Acta Oceanologica Sinica 2020年第10期39卷 11-26页

作者： Qinsheng Wei Baodong Wang Mingzhu Fu Junchuan Sun Qingzhen Yao Ming Xin Zhigang Yu First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Frontiers Science Center for Deep Ocean Multispheres and Earth System Ministry of EducationOcean University of ChinaQingdao 266100China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Investigating the spatiotemporal variability of biogeochemical processes and ecological responses under multiple physical controls in shelf seas is of great importance for obtaining an in-depth understanding of marine *** on a compiled data set of historical observations and remote sensing data,the spatiotemporal variability and heterogeneity of physical-biogeochemical processes in the semi-enclosed south yellow sea(SYS)are investigated,and the intrinsic connectivity among different subregions and the associated mechanisms are *** results show that the seasonal alternation between southward transport in cold seasons and upwelling-induced vertical delivery in warm seasons is the primary physical control of the biogeochemical processes and primary production off Shidao and in the area adjacent to the Haizhou *** northeastward expansion of coastal waters in the Subei Shoal constitutes an important physical driver for the offshore transport of Ulva prolifera in *** significantly affects the biogeochemical processes in the yellow sea Cold Water Mass(YSCWM)-dominated area during warm seasons,and nutrients can accumulate in bottom waters from spring to autumn,making the yellow sea Cold Water Mass(YSCWM)be an important nutrient *** around the YSCWM boundary in the stratified season leads to consistency among the high chlorophyll a(Chl a)area,high primary productivity region and low-temperature upwelling *** cold seasons,the interactions of the southward cold waters in the western nearshore area and the northward warm waters in the central region lead to an“S”-shaped front in the *** summer,upwelling can extract nutrients from the YSCWM;thus,the biogeochemical-ecological processes inside the cold-water mass and in the frontal zone are well connected via upwelling,and three typical physical-biogeochemical coupling regions are generated,namely,the Shidao coast,the area beyond the Haizhou Bay and the area off the

关键词： physical-biogeochemical process upwelling front yellow sea Cold Water Mass south yellow sea

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Mineral distributions in surface sediments of the western south yellow sea:implications for sediment provenance and transportation

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Chinese Journal of Oceanology and Limnology 2015年第2期33卷 510-524页

作者：卢健李安春黄朋李艳 Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences University of Chinese Academy of Sciences Yantai Ocean Environmental Monitoring Central Station of State Oceanic Administration

The south yellow sea(SYS) is strongly influenced by the substantial sediment loads of the Huanghe(yellow)(including the modern Huanghe and abandoned old Huanghe subaqueous delta) and Changjiang(Yangtze) Rivers. However,the dispersal patterns of these sediments,especially in the western SYS,have not been clearly illustrated. In this study,we have analyzed clay minerals,detrital minerals,and grain sizes for 245 surface sediment samples(0–5 cm) collected from the western SYS. The clay minerals,on average,consist of 67% illite,14% smectite,11% chlorite,and 8% kaolinite. Clay minerals,detrital minerals,and grain size analyses of surface sediments,combined with water mass hydrology analysis,reveal that sediments in the western SYS are mainly derived from the modern Huanghe River,the abandoned subaqueous delta of the old Huanghe River,some material from the Changjiang,and coastal erosion. The clay minerals(especially illite and smectite) and quartz/feldspar ratio distribution patterns,reveal that the influence of modern Huanghe sediments can reach 35°N in the northwestern part of the study area,an influence that can be enhanced especially in winter owing to northerly winds. Conversely,sediments along the Jiangsu coast are mixed,in summer,with material from the Changjiang arriving via northward flow of Changjiang Diluted Water. The Subei Coastal Current carries the refreshed sediments northward into the western SYS. Sediment distribution and transport in the western SYS are mainly controlled by the oceanic circulation system that is primarily related to the monsoon.

关键词： south yellow sea clay mineral Subei Coastal Current provenance

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Role of Resuspended Sediments as Sources of Dissolved Inorganic Phosphorus Along Different Dimensions in the Subei Shoal, south yellow sea, China

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Journal of Ocean University of China 2023年第1期22卷 161-170页

作者： WANG Changyou ZHENG Ping SU Rongguo LUO Zhuhua ZHANG Yuanzhi MAO Longjiang School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing 210044China Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao 266100China Key Laboratory of Marine Biogenetic Resources Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China

Several studies have documented that during‘green tide’events,comprising green macroalgae blooms in aquatic ecosystems,dissolved inorganic phosphorus(DIP)levels remain relatively steady despite the absorption of a large amount of *** this study,surface sediment samples and a sediment core were extracted using a modified sequential extraction scheme,and water and surface sediment samples were analyzed in April 2017 to better understand phosphorus(P)cycling and replenishment in Subei *** used a simple model on equilibrium of adsorption-desorption to present the buffering capacity of *** total P(TP)in the surface sediments ranged from 12.2 to 28.4μmol g^(-1)(average 15.5μmol g^(-1))and was dominated by inorganic ***,exchangeable P,reactive and reductive Fe/Al bound P,and authigenic apatite P significantly decreased northward and eastward from Subei shoal,contrary to the detrital P and organic P *** and particulate inorganic P in the water samples ranged from 0.01 to 0.54μmol L^(-1)(average 0.19μmol L^(-1))and 0.9 to 19.6μmol g^(-1)(average 4.9μmol g^(-1)),*** applied model showed that suspended particulate matter is an important regulator of DIP ***,modification of SPM can alter the DIP buffering *** calculated buffering capacity in the surface layer of the sea water was>60 within Subei shoal and always>10 along the path of floating Ulva prolifera,providing a reasonable explanation for the steady concentration of DIP and its replenishment during the blooming of this green macroalgae.

关键词： phosphorus speciation sediment buffering capacity south yellow sea

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Spatiotemporal distribution and influencing factors of Ulva prolifera and Sargassum and their coexistence in the south yellow sea,China

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Journal of Oceanology and Limnology 2022年第3期40卷 1070-1084页

作者： Longxiao ZHENG Mengquan WU Min ZHOU Lianjie ZHAO College of Resources and Environmental Engineering Ludong UniversityYantai 264039China

Marine ecological disasters occurred frequently in recent years and raised widespread concerns about the ecological health of the *** analyzed the spatiotemporal distributions of Ulva prolifera and Sargassum from April to July each year between 2016 and 2020 in the south yellow sea using multisource(GF-1 and HJ-1A/1B)remote sensing images,combined with the MODIS sea surface temperature(SST)data,photosynthetically active radiation(PAR)data,and Quick SCAT sea surface wind(SSW)data,to explore the potential influencing *** results show that(1)*** and Sargassum appeared mainly from May to July and April to June,respectively;(2)*** showed an impact in larger spatial scope than that of *** originated in the shoal area of northern Jiangsu and finally disappeared in the sea near Haiyang-Rongcheng *** spatial scope of the impact of Sargassum tended to *** was first detected in the ocean northeast of the Changjiang(Yangtze)River estuary and disappeared near 35°N;and(3)correlation analysis showed that the SST influenced the growth rate of *** and *** had varied eff ects on *** and Sargassum at different times.A moderate light conditions could accelerate the growth and reproduction of *** and *** irradiance levels of ultraviolet radiation may cause photoinhibition and damage on *** and *** southeast monsoon and surface currents promoted the drift of *** and Sargassum from the southeast to the northwest and ***,the spatial and temporal similarities and differences between *** and Sargassum were influenced by a combination of factors during their growth processes.

关键词： Ulva prolifera Sargassum virtual-baseline floating macro algae height(VB-FAH) spatiotemporal distribution south yellow sea multi-source remote sensing

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Characterization of microbial communities in sediments of the south yellow sea

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Journal of Oceanology and Limnology 2021年第3期39卷 846-864页

作者： Ye CHEN Siqi LI Xiaoqing XU Manman MA Tiezhu MI Yu ZHEN Zhigang YU College of Marine Life Science Ocean University of ChinaQingdao 266003China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Marine Environment and Ecology Ministry of EducationQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education/Institute for Advanced Ocean StudyOcean University of ChinaQingdao 266100China

Illumina sequencing and quantitative PCR(qPCR)based on the 16 S ribosomal RNA(rRNA)gene were conducted to characterize the vertical distribution of bacterial and archaeal communities in the sediments of two sites from the south yellow *** bacterial and archaeal communities showed a clear stratified distribution with sediment *** microbial communities in the upper layers were distinct from those in the deeper layers;the relative abundances of sequences of Thaumarchaeota,Gammaproteobacteria,and Actinobacteria were higher in the upper than in the deeper sediments,whereas the sequences of Bathyarchaeia,Lokiarchaeota,Euryarchaeota,Chloroflexi,and Deltaproteobacteria were relatively more abundant in the deeper *** depth and total organic carbon(TOC)can significantly influence both the bacterial and archaeal ***,bacterial and archaeal groups potentially involved in nitrogen,sulfur,and methane metabolism were detected in both *** our study,both ammonia-oxidizing bacteria(Nitrospira)and ammonia-oxidizing archaea(Candidatus Nitrosopumilus)were responsible for ammonia ***,sulfur-reducing bacteria SEEP-SRB1 forming consortia with anaerobic methane-oxidizing archaea ANME-2 a-2 b were capable of anaerobic methane oxidation(AOM)in the 3400-02 sediment samples.

关键词： microbial community 16S rRNA gene high-throughput sequencing south yellow sea sediment

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Evolution of Palaeoenvironment of the south yellow sea Since the Last Deglaciation

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Journal of Ocean University of China 2020年第4期19卷 827-836页

作者： WANG Haoyin LI Guangxue ZHANG Yang LIU Yong LIU Dongsheng DING Dong XU Jishang MA Yanyan QIAO Lulu WANG Liyan LI Qian Key Laboratory of Submarine Sciences&Prospecting Techniques Ministry of EducationOcean University of ChinaQingdao 266100China College of Marine Geosciences Ocean University of ChinaQingdao 266100China

The sediments in core YS01 recovered from the south yellow sea mud deposit zone contain abundant benthic foraminifera,particularly shallow continental shelf species,but rare of planktonic *** benthic foraminifera are dominated by stenohaline cold shallow-water species and euryhaline brackish-water *** this paper,the palaeoenvironmental changes were discussed based on the grain-size compositions and benthic foraminiferal *** different benthic foraminiferal assemblages were discriminated by species analysis from the foraminiferal *** to AMS14C dating data in core YS01,we identified four main stages of marine environmental changes since the last deglaciation:a near-shore depositional stage(13.1–9.5 kyr B.P.),a transitional stage from near-shore deposition to shallow-sea deposition(9.5–5.6 kyr B.P.),a high sea level stage with shallow-sea deposition(5.6–2.9 kyr B.P.),and a stable shallow-sea depositional stage(2.9 kyr *** the present).

关键词： benthic foraminifera last deglaciation south yellow sea palaeoenvironmental change

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Composition, Source and Environmental Indication of Clay Minerals in Sediments from Mud Deposits in he southern Weihai Offshore, Northwestern Shelf of the south yellow sea, China

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Journal of Ocean University of China 2022年第5期21卷 1161-1173页

作者： LIU Jinqing LIU Yilin YIN Ping GAO Fei CAO Ke CHEN Xiaoying College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China

Studying the sedimentary characteristics of the muddy area along the yellow sea shelf is of great significance for deep-ening the understanding of the climate and environment evolution since the last glacial ***,a small muddy area developed in the southern Weihai offshore has attracted a lot of *** on high-resolution grain size,clay mineral,AMS14C,and OSL data of sediments from the core WHZK01 in the muddy area,we acquired a new understanding of sedimentary characteristics,sources and paleoclimatic environment during the last 13 *** results show that the core WHZK01 sediments were mainly from the yellow River and local rivers along the ***,the sources varied for different deposition *** riverbed(before 13 kyr BP)and fluvial plain deposits(13-10 kyr BP)were mainly from local river *** very thin littoral deposits from 10 kyr BP to 8 kyr BP also mainly originate from coastal river inputs,while the littoral-neritic deposits since 8 kyr BP were dominated by the yellow River materials and partly supplied by the coastal rivers and the island *** addition,five events related with the strong East Asian winter monsoon(EAWM)during the intervals of 13.0-11.0 kyr BP,10.0-8.2 kyr BP,7.0-5.0 kyr BP,3.5-2.5 kyr BP,and 1.2-0.5 kyr BP were *** events related with the enhancement of the EAWM since the middle Holocene have strengthened the transport capacity of the coastal currents of the Shandong ***,more yellow River-derived distal sediments were deposited to the southern Weihai offshore and formed wedge-shaped muddy *** short,the ratio of smectite/illite could be used as an effective EAWM indicator since 13 kyr BP on the northwestern shelf of the south yellow sea.

关键词： clay minerals sediment provenance East Asian winter monsoon mud deposits southern Weihai offshore south yellow sea

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11000-Year Record of Trace Metals in Sediments off the southern Shandong Peninsula in the south yellow sea

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Journal of Ocean University of China 2020年第6期19卷 1307-1314页

作者： QIU Jiandong LIU Jinqing LI Meina CAO Ke WANG Shuang YUE Nana Qingdao Institute of Marine Geology Ministry of Natural ResourcesQingdao 266071China Shandong Key Laboratory of Depositional Mineralization&Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590China First Institute of Oceanography Ministry of Natural ResourceQingdao 266061China

Geochemical background values are the normal concentration of trace metals in the natural environment and sediment cores have been proved to be excellent samples to get these *** trace metal(Cu,Pb,Zn,Cr,Cd,As,Hg,Ni,Li,and Co)concentration profiles along a sediment core are investigated to get the background values and to assess the depositional processes and contamination levels off the southern Shandong Peninsula,*** the metals,except As and Hg,had similar concentration profiles with the highest average values during the period of 6-3 *** high concentrations of As and Hg occurred before 6ka and during the period of 3-0 *** difference in metal concentrations before and after 6 kyr was mainly attributed to the source of core sediments,which are derived from proximal sediment on the Shandong Peninsula before 6 kyr and the mixture of proximal sediment and yellow River sediment after 6 *** effects of particle size and human activity were mainly contributed to the metal concentrations since 6 *** average concentrations of trace elements in sediments between 6 and 3 kyr were selected as background *** principal component factor analysis indicate that the metals were from the natural sources throughout the observed depositional period,with the exception of As and Hg,which may had anthropogenic sources for the sediments from the bottom 2 m of the *** geoaccumulation indices indicate that the sediments were not contaminated for Cu,Zn,Cr,Cd,Pb,Ni,Li and Co,whereas they were contaminated recently for As and Hg due to the regional civilization and human activities.

关键词： trace metals core sediment Shandong Peninsula south yellow sea

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Numerical Simulation and Analysis of Storm Surges Under Different Extreme Weather Event and Typhoon Experiments in the south yellow sea

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Journal of Ocean University of China 2022年第1期21卷 1-14页

作者： ZHANG Mingzong ZHOU Chunyan ZHANG Jisheng ZHANG Xinzhou TANG Zihao Key Laboratory of Ministry of Education for Coastal Disaster and Protection Hohai UniversityNanjing 210024China College of Harbour Coastal and Offshore EngineeringHohai UniversityNanjing 210024China Key Laboratory of Port Waterway and Sedimentation Engineering of the Ministry of TransportNanjing Hydraulic Research InstituteNanjing 210029China Department of Civil and Environment Engineering University of AucklandAuckland 1023New Zealand

In this study,a coupled tide-surge-wave model was developed and applied to the south yellow *** coupled model simulated the evolution of storm surges and waves caused by extreme weather events,such as tropical cyclones,cold waves,extratropical cyclones coupled with a cold wave,and tropical cyclones coupled with a cold *** modeled surge level and significant wave height matched the measured data *** results of the typhoon with different intensities revealed that the radius to the maximum wind speed of a typhoon with 1.5 times wind speed decreased,and its influence range was farther away from the Jiangsu coastal region;moreover,the impact on surge levels was ***,eight hypothetical typhoons based on Typhoon Chan-hom were designed to investigate the effects of varying typhoon tracks on the extreme value and spatial distribution of storm surges in the offshore area of Jiangsu *** typhoon along path 2 mainly affected the Rudong coast,and the topography of the Rudong coast was conducive to the increase in surge ***,the typhoon along path 2 induced the largest surge level,which reached up to 2.91 m in the radial sand ridge *** maximum surge levels in the Haizhou Bay area and the middle straight coastline area reached up to 2.37 and 2.08 m,*** terms of typhoons active in offshore areas,the radial sand ridge area was most likely to be threatened by typhoon-induced storm surges.

关键词： Jiangsu coast south yellow sea extreme weather events storm surge numerical experiments

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