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Science China chemistry 2013年第12期56卷 1749-1756页

作者： LIN Qi LIN HongMei ZHANG YuanHui RONG MingCong KE HuiXian TANG XinHua CHEN Xi key lab of global change and marine-atmospheric chemistry SOA Third Institute of Oceanography SOA Department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen Standard Scientific Instrument Co. Ltd.

In this work,we reported a simultaneous determination approach for Pb(II),Cd(II)and Zn(II)atμg L 1concentration levels using differential pulse stripping voltammetry on a bismuth film electrode(BiFE).The BiFE could be prepared in situ when the sample solution contained a suitable amount of Bi(NO)3,and its analytical performance was evaluated for the simultaneous determination of Pb(II),Cd(II)and Zn(II)in *** determination limits were found to be 0.19μg L 1for Zn(II),and0.28μg L 1for Pb(II)and Cd(II),with a preconcentration time of 300 *** BiFE approach was successfully applied to determine Pb(II),Cd(II)and Zn(II)in tea leaf and infusion samples,and the results were in agreement with those obtained using an atomic absorption spectrometry *** Hg usage,the in situ preparation for BiFE supplied a green and acceptability sensitive method for the determination of the heavy metal ions.

关键词： bismuth film electrode differential pulse stripping voltammetry tea leaves tea infusion

Nitrous oxide research progress in polar and sub-polar oceans

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Advances in Polar Science 2020年第4期31卷 241-247页

作者： ZHAN Liyang ZHANG Jiexia LI Yuhong&WU Man key laboratory of global change and marine-atmospheric chemistry Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China

N2O gas depletes ozone and has a powerful greenhouse *** are among the most important N2O sources and have been the subject of extensive *** oceans are important regions for deep water formation and global-scale thermohaline ***,these water bodies play an important role in the N2O budget,however,these regions were not well *** review of previously published studies and data on polar oceans,including both the Arctic Ocean and Southern Ocean,describes the distribution pattern of N2O and possible regulating mechanism of these distribution patterns and shows that the Arctic Ocean and Southern Ocean both represent source and sink regions,suggesting that the source/sink characteristics of the Arctic and Southern oceans and their strengths need further *** related to N2O circulation in polar oceans were proposed,and future work is suggested.

关键词： nitrous oxide source/sink Arctic Ocean Southern Ocean Prydz Bay

A POSSIBLE IMPACT OF EL NINO MODOKI ON SEA SURFACE TEMPERATURE OF CHINA'S OFFSHORE AND ITS ADJACENT REGIONS

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Journal of Tropical Meteorology 2014年第1期20卷 1-7页

作者：谭红建蔡榕硕 key laboratory of global change and marine-atmospheric chemistry Third Institute of Oceanography State Oceanic Administration Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of Sciences

El Nio Modoki,similar to but different from canonical El Nio,has been observed since the *** this paper,using HadISST and NCEP/NCAR wind data,we analyze the relationship between El Nio Modoki and Sea Surface Temperature(SST)in the offshore area of China and its adjacent waters for different *** results show a significant negative correlation between El Nio Modoki in summer and SST in autumn in the offshore area of China and its adjacent waters,particularly for regions located in the east of the *** is also found that during El Nio Modoki period,anomalous northerlies prevail over the regions from the northern part of the Philippines to the offshore area of China,indicating that the northerlies are unfavorable for the transport of warm water from the western tropical Pacific to the mid-latitude ***,El Nio Modoki in summer may play a substantial role in cold SST anomalies in the offshore area of China and its adjacent waters in autumn through the influence of the Kuroshio,with a lagged response of the ocean to the atmospheric wind field.

关键词： offshore area of China and its adjacent waters SST El Ni?o Modoki Kuroshio anomalous northerlies

Differences in nitrous oxide distribution patterns between the Bering Sea basin and Indian Sector of the Southern Ocean

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Acta Oceanologica Sinica 2014年第6期33卷 9-19页

作者： CHEN Liqi ZHANG Jiexia ZHAN Liyang LI Yuhong SUN Heng College of Ocean and Earth Science Xiamen University key laboratory of global change and marine-atmospheric chemistry of State Oceanic Administration Third Institute of OceanographyState Oceanic Administration

Nitrous oxide （N2O） distribution patterns in the Bering Sea basin （BSB） and Indian Sector of the Southern Ocean （ISSO） were described and compared. In both sites, the waters were divided into four layers： surface layer, subsurface layer, N2O maximum layer, and deep water. Simulations were made to find out the most important factors that regulate the N2O distribution patterns in different layers of both sites. The results showed that in the surface water, N2O was more understaturated in the ISSO than the BSB. This phenom- enon in the surface water of ISSO may result from ice melt water intrusion and northeastward transport of the Antarctic surface water. Results of the rough estimation of air-sea fluxes during the expedition were （-0.34±0.07）-（-0.64±0.13） μmol/（m2·d） and （-1.47±0.42）-（-1.77±0.51） μmol/（m-2·d） for the BSB and the ISSO, respectively. Strongly stratified surface layer and temperature minimum layer restricted exchange across the thermocline. The N2O maximum existed in higher concentration and deeper in the BSB than the ISSO, but their contribution to the upper layer by eddy diffusions was negligible. In deep waters, a concentration difference of 5 nmol/L N2O between these two sites was found, which suggested that N2O production occurred during thermohaline circulation. N2O may be a useful tracer to study important large-scale hydrographic processes.

关键词： nitrous oxide Bering Sea basin Southern Ocean distribution

Characteristics of pCO_(2) in surface water of the Bering Abyssal Plain and their effects on carbon cycle in the western Arctic Ocean

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Science China Earth Sciences 2004年第11期47卷 1035-1044页

作者： CHEN Liqi1,2,GAO Zhongyong1,3,WANG Weiqiang3 & YANG Xulin1,3 1.key lab of global change and marine-atmospheric chemistry,State Oceanic Administration,Xiamen 361005,China 2.Chinese Arctic and Antarctic Administration,Beijing 100860,China 3.Third Institute of Oceanography,State Oceanic Administration,Xiamen 361005,China Correspondence should be addressed to Chen Liqi(email: Lqchen@***) key lab of global change and marine-atmospheric chemistry State Oceanic Administration Xiamen China Chinese Arctic and Antarctic Administration Beijing China Third Institute of Oceanography State Oceanic Administration Xiamen China

Characteristics of the pCO2 distribution in surface water of the Bering Abyssal Plain and their relationships with the ambient hydrological conditions were discussed using variations of the partial pressure of CO2 in surface water of the Bering Abyssal Plain and the Chukchi Sea. Data in this study are from a field investigation during the First Chinese National Arctic Research Expedition in 1999. Compared to the high productivity in the Bering Continental Shelf, much lower levels of chlorophyll a were observed in the Bering Abyssal Plain. The effect of hydrological factors on the pCO2 distribution in surface seawater of the Plain in summer has become a major driving force and dominated over biological factors. The Plain also presents a High Nutrient Low Chlorophyll (HNLC). In addition, the pCO2 distribution in the Bering Abyssal Plain has also been found to be influenced from the Bering Slope Current which would transform to the Anadyr Cur- rent when it inflows northwestward over the Plain. The Anadyr Current would bring a high nutrient water to the western Arctic Ocean where local nutrients are almost depleted in the surface water during the summer time. Resupplying nutrients would stimulate the growth of phytoplankton and enhance capacity of absorbing atmospheric CO2 in the surface water. Otherwise, in the Bering Sea the dissolved inorganic carbon brought from freshwater are not deposited down to the deep sea water but most of them would be transported into the western Arctic Ocean by the Alaska Coastal Current to form a carbon sink there. Therefore, the two carbon sinks in the western Arctic Ocean, one carried by the Anadyr Current and another by the Alaska Costal Current, will impli- cate the western Arctic Ocean in global change.

关键词： pCO2, Arctic carbon sinks, water masses transport, Bering Abyssal Plain, Chukchi Sea.

Separation of strontium from associated elements with selective specific resin and extraction chromatography

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Chinese Chemical Letters 2013年第7期24卷 633-635页

作者： Shu-Chao Wu Chao-Yang Sun Wen-Ni Wang Ying-Ting He Sheng-Hong Hu Cun-Jiang Zheng Faculty of Earth Sciences China University of Geosciences Zhejiang Institute of Geology & Mineral Resources key laboratory of global change and marine-atmospheric chemistry State Oceanic Administration

In this paper, separation of Sr from associated elements （Na, K, Ca, Mg, and Ba） was carried out using an extraction chromatographic column packed with Sr selective specific resin consisting of an octanol solution of 4,4＇（5＇）-bis（t-butylcyclohexo）-lS-crown-6 sorbed on an inert polymeric support. Using 8.0 mol/L HNO3 as the eluent, Ba and associated elements were eluted immediately from the column, whereas Sr was strongly retained. The adsorbed Sr could then be stripped from the column as the eluent was changed to 0.05 mol/L HNO~. Complete Sr/Ba separation was demonstrated to be feasible in that Ba could be washed from the column leaving pure Sr by adequate rinsing with 8.0 mol/L HN03. Furthermore, matrix effect could be effectively eliminated and the selectivity of the method was improved. The method was applied for the determination of Sr in the high purity barium carbonate （BaCO3） product and seawater. The recoveries of Sr in 2 samples were determined to be 93.2% and 109%, respectively.

关键词： Strontium Extraction chromatography Selective specific resin

The synthesis of B,N-carbon dots by a combustion method and the application of fluorescence detection for Cu^2+

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Chinese Chemical Letters 2017年第5期28卷 1119-1124页

作者： Ming-Cong Rong Ke-Xin Zhang Yi-Ru Wang Xi Chen Department of chemistry and the MOE key laboratory of Spectrochemical Analysis&Instrumentation College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State key laboratory of marine Environmental Science Xiamen UniversityXiamen 361005China key laboratory of global change and marine-atmospheric chemistry Third Institute of OceanographyState Oceanic AdministrationXiamen 361005China

Heteroatom doping is an efficient approach to regulate the fluorescence properties of carbon *** aminophenylboronic acid as the raw material,a combustion method was developed for the synthesis of boron,nitrogen-doped carbon dots（B,N-carbon dots）.The B,N-carbon dots emitted green fluorescence and displayed high resistance to both photo bleaching and ionic strength.A facile fluorescence sensing approach for Cu^2＋ was fabricated via static fluorescence *** optimal conditions,a rapid detection of Cu^2＋ could be completed in 2 min with a linearity ranging from 1 μmol/L to 25 μmol/L and a detection limit of 0.3 μmol/L Furthermore,the proposed method showed potential applications for the detection of Cu^2＋ in natural water samples.

关键词： Combustion method B N-carbon dots Fluorescence method Cu^2+ Static fluorescence quenching

Unveiling controls of the latitudinal gradient of surface pCO_(2) in the Kuroshio Extension and its recirculation regions(northwestern North Pacific)in late spring

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Acta Oceanologica Sinica 2022年第5期41卷 110-123页

作者： Chenglong Li Weidong Zhai Di Qi Institute of marine Science and Technology Shandong UniversityQingdao266237China Polar and marine Research Institute Jimei UniversityXiamen361021China key laboratory of global change and marine-atmospheric chemistry of Ministry of Natural Resources Third Institute of OceanographyMinistry of Natural ResourcesXiamen361005China

In the northwestern North Pacific,annual net air-sea CO_(2) flux is greatest in the Kuroshio Extension(KE)zone,owing to its low annual mean partial pressure of CO_(2)(pCO_(2)),and it decreases southward across the *** quantify the influences of factors controlling the latitudinal gradient in CO_(2) uptake,sea surface pCO_(2) and related parameters were investigated in late spring of 2018 in a study spanning the KE,Kuroshio Recirculation(KR),and subtropical *** found that the sea-to-air pCO_(2) difference(ΔpCO_(2))was negative and at its lowest in the KE zone.ΔpCO_(2) gradually increased southward across the KR zone,and the sea surface was nearly in air-equilibrium with atmospheric CO_(2) in the subtropical *** found that northward cooling and vertical mixing were the two major processes governing the latitudinal gradient in surface pCO_(2) and ΔpCO_(2),while biological influences were relatively *** the KE zone affected by upwelling,the vertical-mixing-induced increase in surface pCO_(2) likely canceled out approximately 61%of the decrease in surface pCO_(2) caused by cooling and biological ***,the prolonged air-sea equilibration for CO_(2) and relatively short hydraulic retention time jointly led to the low surface pCO_(2) in the KE zone in ***,the cooling KE current flows out of the region before it can be re-equilibrated with atmospheric CO_(2).

关键词： partial pressure of CO_(2) temperature effect vertical mixing biological activity air-sea exchange northwestern North Pacific

Distribution and sources of polycyclic aromatic hydrocarbons in the water column of Kongsfjorden, Arctic

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Journal of Environmental Sciences 2020年第11期32卷 186-193页

作者： Ruijing Li Hui Gao Zhongqiang Ji Shuaichen Jin Linke Ge Humin Zong Liping Jiao Zhifeng Zhang Guangshui Na National marine Environmental Monitoring Center Dalian 116023China key laboratory of marine Ecosystems and Biogeochemistry Second Institute of OceanographyMinistry of Nature ResourcesHangzhou 310012China key laboratory of Ocean-atmospheric chemistry and global change Third Institute of OceanographyMinistry of Nature ResourcesXiamen 361005China Hainan Tropical Ocean University Key Laboratory of Utilization and Conservation for Tropical Marine BioresourcesMinistry of EducationChina

Kongsfjorden is known for its characteristic multi-layer water mass formed by the convergence of freshwaters from nearby glaciers and rivers and saline water from the Atlantic and *** distribution of polycyclic aromatic hydrocarbons(PAHs)in the water column of Kongsfjorden was investigated and their potential sources were *** total concentrations of 16 PAHs in the surface seawater and river water were in the range of 33.4-79.8 ng/L(mean 48.5 ng/L)and 2.3-201.4 ng/L(mean 126.1 ng/L),***,PAHs were mainly concentrated around river estuaries and the glacier front in the dissolved ***,the PAHs in the particulate phase followed surface-enrichment and depth-depletion patterns in most stations,with the maximum concentration found at 50 m depth in the central area of *** compositions of PAHs in seawater and rivers were similar,with two-ring and tricyclic PAHs comprising the majority of the dissolved and particulate *** found in Kongsfjorden waters appeared to be derived from multiple sources such as petroleum and coal *** in the bay mouth of Kongsfjorden were mainly introduced by the West Spitsbergen Current and the Arctic waters,while in the inner bay,atmospheric deposition and local sources were the major *** distribution of PAHs was mainly attributed to the suspended particulate distribution.

关键词： PAHs Distribution Source Water mass Kongsfjorden

Methane in the Yellow Sea and East China Sea: dynamics, distribution, and production

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Journal of Oceanology and Limnology 2022年第2期40卷 530-550页

作者： Wangwang YE Guanxiang DU Honghai ZHANG Guiling ZHANG Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and TechnologyMinistry of EducationOcean University of ChinaQingdao 266100China key laboratory of global change and marine-atmospheric chemistry Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China laboratory for marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

The Yellow Sea(YS)and East China Sea(ECS)are important marginal seas of the western *** the dynamics of methane(CH_(4))in the YS and ECS are essential to evaluate the role of coastal seas in global *** measured dissolved CH_(4) at various depths in the water column of the YS and ECS during a cruise from March to April *** concentrations of CH_(4) varied greatly in different water masses,suggesting that the hydrographic conditions can substantially aff ect the CH_(4) *** CH_(4) budget in the shelf of the ECS,which was estimated with a box model,suggests CH_(4) consumption in the water column was the major sink(>95%),followed by a loss with a total of 2.2%CH_(4) released to the *** a local CH_(4) production of 0.28 nmol/(L·d)was needed to maintain the CH_(4) *** from laboratory incubations showed an increase in CH_(4)(1.5 times higher than the value of the control)after the addition of dimethylsulfoniopropionate(DMSP).Field incubations result in a CH_(4) production rate of 1.2 nmol/(L·d)under a N-stressed conditions(N꞉P<1),indicates that the DMSP-dependent CH_(4) production prefer to occur in the oligotrophic seawaters,where nitrogen is *** study demonstrates that the marginal seas of China is a hotspot for CH_(4) dynamics,and the cycling of methylated sulfur compounds(such as DMSP)may contribute importantly to locally formed CH_(4).This may have further implication to carbon and sulfur biogeochemical cycles in the western Pacific.

关键词： methane East China Sea Yellow Sea aerobic production dimethylsulfi de(DMS) dimethylsulfoniopropionate(DMSP)