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Acta Oceanologica Sinica 2023年第8期42卷 24-31页

作者： Hequan Gu Feng Zhao Zhixin Ni Meigui Wu Li Zhao Aicui Dang Dongmei Li Minxia Zhang Qin Hu South China Sea Environment Monitoring Center State Oceanic AdministrationGuangzhou 510300China Nansha Islands Coral Reef Ecosystem National Observation and Research Station Guangzhou 510300China Key Laboratory of Marine Environmental Survey Technology and Application Ministry of Natural ResourcesGuangzhou 510300China CNOOC Research Institute Co. Ltd.Beijing 100028China

Submarine groundwater discharge(SGD),which can be traced using naturally occurring radium isotopes,has been recognized as a significant nutrient source and land-ocean interaction passage for the coastal waters of the daya bay,***,uncertainties in assessing SGD fluxes must still be discussed in *** this study,we attempted to utilize the Monte Carlo method to evaluate the uncertainties of radium-derived SGD flux in the northeast and entirety of the daya *** results show that the uncertainties of the SGD estimate in the northeast bay are very sensitive to variations in excess radium inventories as well as radium inputs from bottom sediments,while the uncertainties of the SGD estimate for the entire bay are strongly affected by fluctuations in radium inputs from bottom sediments and radium end-members of *** study will help to distinguish the key factors controlling the accuracy of SGD estimates in similar coastal waters.

关键词： submarine groundwater discharge(SGD) radium isotopes Monte-Carlo method daya bay uncertainty analysis

A model of ^90Sr distribution in the sea near daya bay Nuclear Power Plant in China

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Frontiers of Environmental Science & Engineering 2014年第6期8卷 845-853页

作者： Jingyu WANG Hongwei FANG Guojian HE Lei HUANG The State Key Laboratory of Hydro Science and Engineering Department of Hydraulic Engineering Tsinghua University Beijing 100084 China

The impact on the environment ofradionuclide release from nuclear power plants has attracted increased attention, especially after the accident at Fukushima Daiichi Nuclear Power Plant in Japan. Based on the mechanisms of adsorption/desorption at solid/liquid interfaces and a surface micromorphology model of sediments, a theoretical expression of the distribution coefficient Kd is derived. This coefficient has significant effects on the distribution of radionuclide in seawater, suspended sediment and seabed sediment. Kd is then used to simulate ^90Sr transport in the sea near the daya bay Nuclear Power Plant. The simulation results are compared with field measurements of tidal level, current velocity, suspended sediment concentration and ^90Sr concentrations in the same period. Overall, the simulated results agree well with the field measured data. Thus, the derived expression for Ka is capable of interpreting realistic adsorption/desorption processes. What＇s more, conclusion is drawn that about 40% ^90Sr released by daya bay Nuclear Power Plant will be adsorbed by suspended sediment and 20% by seabed sediment, only about 40% ^90St will remain in the sea near daya bay Nuclear Power Plant in South China Sea.

关键词： distribution coefficient daya bay hydrodynamic sediment transport radionuclide transport

Improved measurement of electron antineutrino disappearance at daya bay

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Chinese Physics C 2013年第1期37卷 1-20页

作者：安丰鹏安琪白景芝 A.B.Balantekin H.R.Band W.Beriguete M.Bishai S.Blyth R.L.Brown 曹国富曹俊 R.Carr W.T.Chan 常劲帆 Y.Chang C.Chasman 陈和生 H.Y.Chen 陈申见陈少敏陈潇聪陈晓辉陈晓苏陈羽陈义学 J.J.Cherwinka 朱明中 J.P.Cummings 邓子艳丁雅韵 M.V.Diwan E.Draeger 杜小峰 D.Dwyer W.R.Edwards S.R.Ely 方绍东付金煜付在伟葛良全 R.L.Gi11 M.Gonchar 龚光华宫辉 Y.A.Gornushkin 顾文强关梦云郭新恒 R.W.Hackenburg R.L.Hahn S.Hans 郝慧峰何苗贺青 K.M.Heeger 衡月昆 P.Hinrichs Y.K.Hor Y.B.Hsiung B.z.Hu 胡涛黄翰雄 H.z.Huang 黄性涛 P.Huber V.Issakov z.Isvan D.E.Jaffe S.Jetter 季筱璐季向盼姜海静焦健斌 R.A.Johnson 康丽 S.H.Kettell M.Kramer 关健强郭文伟郭人能 C.Y.Lai 赖万昌 W.H.Lai K.Lau L.Lebanowski J.Lee 雷瑞霆 R.Leitner 梁干庄梁嘉怡 C.A.Lewis 李飞李高嵩李秋菊李卫东李小波李小男李学潜李仪李志斌梁昊林政儒 C.L.Lin S.K.Lin 林延畅凌家杰 J.M.Link L.Littenberg B.R.Littlejohn D.W.Liu 刘金昌刘江来刘颖彪陆昌国路浩奇陆永康 K.B.Luk 马秋梅马续波马骁妍马宇蒨 K.T.McDonald M.C.McFarlane R.D.McKeown Y.Meng D.Mohapatra Y.Nakajima J.Napolitano D.Naumov I.Nemchenok 倪浩然 W.K.Ngai 聂阳波宁哲 J.P.Ochoa-Ricoux A.Olshevski S.Patton V.Pec J.C.Peng L.E.Piilonen L.Pinsky 潘振声齐法制祁鸣钱鑫 N.Raper 任杰 R.Rosero B.Roskovec 阮锡超邵贝贝师恺 H.Steiner 孙功星孙吉良 N.Tagg 谭耀豪 H.K.Tanaka 唐晓 H.Themann Y.Torun S.Trentalange O.Tsai K.V.Tsang R.H.M.Tsang C.E.Tull Y.C.Tung B.Viren V.Vorobe1 C.H.Wang 王灵淑王玲玉王龙泽王萌王乃彦王瑞光 W.Wang 王玺王贻芳王喆王铮王志民 D.M.Webber 魏瀚宇魏亚东温良剑 K.Whisnant C.G.White L.Whitehead Y.Williamson T.Wise H.L.H.Wong E.T.Worcester F.F.Wu 吴群习建博夏冬梅邢志忠徐建一徐晶徐吉磊徐晔薛涛杨长根杨雷叶梅 M.Yeh Y.S.Yeh B.L.Young 于泽源占亮 C.Zhang 章飞虹张家文张清民张书华张一纯张银鸿张一心张志坚张子平张智勇赵洁赵庆旺赵豫斌郑磊钟玮丽周莉周祖英庄红林邹佳恒 Institute of High Energy Physics Chinese Academy of Sciences University of Science and Technology of China University of Wisconsin Brookhaven National Laboratory National United University California Institute of Technology Nanjing University Department of Engineering Physics Tsinghua University Chinese University of Hong Kong Shenzhen Univeristy North China Electric Power University Siena College Department of Physics Illinois Institute of Technology Lawrence Berkeley National Laboratory Department of Physics University of California Department of Physics University of Illinois at Urbana-Champaign Chengdu University of Technology Joint Institute for Nuclear Research Shanghai Jiao Tong University Beijing Normal University Joseph Henry Laboratories Princeton University Center for Neutrino Physics Virginia Tech Department of Physics National Taiwan University Institute of Physics National Chiao-Tung University China Institute of Atomic Energy University of California Shandong University School of Physics Nankai University University of Cincinnati Dongguan University of Technology Department of Physics The University of Hong Kong Department of Physics University of Houston Charles University Faculty of Mathematics and Physics Sun Yat-Sen(Zhongshan)University College of William and Mary Rensselaer Polytechnic Institute China Guangdong Nuclear Power Group Iowa State University Xi'an Jiaotong University

We report an improved measurement of the neutrino mixing angle θ13 from the daya bay Reactor Neutrino Experiment. We exclude a zero value for sin22θ13 with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GWm th were detected in six antineutrino detectors deployed in two near （flux-weighted baselines of 470 m and 576 m） and one far （1648 m） underground experimental halls. Using 139 days of data, 28909 （205308） electron antineutrino candidates were detected at the far hall （near halls）. The ratio of the observed to the expected number of antineutrinos assuming no oscillations at the far hall is 0.944± 0.007（stat.） ± 0.003（syst.）. An analysis of the relative rates in six detectors finds sin22θ13=0.089± 0.010（stat.）±0.005（syst.） in a three-neutrino framework.

关键词： neutrino oscillation neutrino mixing reactor daya bay

Surface currents measured by GPS drifters in daya bay and along the eastern Guangdong coast

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Frontiers of Earth Science 2020年第2期14卷 376-383页

作者： Yang GAO Yongxiang HUANG Hongyang LIN Zhenyu SUN Jia ZHU Jianyu HU State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China

GPS-based surface drifters were used to investigate the surface currents in daya bay and along the eastern Guangdong coast in *** current vectors were measured based on the GPS location and corresponding time information sent by drifters through the mobile phone *** analysis of data from 120 drifters,deployed in late spring 2018 in the case-study region,shows that the drifters are generally capable of capturing the surface(tidal and residual)*** drifter trajectories suggest an anticlockwise surface current inside daya bay and a north-eastward current along the eastern Guangdong coast,where the coastal current along the eastern Guangdong coast is faster than that inside daya *** surface currents in the investigated region follow an irregular semidiurnal cycle due to the influence of the tidal current,while the currents inside daya bay are strongly affected by the *** to the harmonic analysis,an irregular semidiurnal type of tidal current is evident at a study grid inside daya bay,with an Eulerian residual current speed of 9.0 cm/s and a direction of 276°.The Lagrangian residual current outside daya bay moves north-eastward with a mean speed of 22 cm/s along the eastern Guangdong coast,while the current inside daya bay moves northward to the bay head with a mean speed of about 8.0 cm/s,which agrees well with the one reported in other literatures.

关键词： drifter surface current residual current daya bay eastern Guangdong coast

Study of RPC gas composition using daya bay RPCs

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Chinese Physics C 2010年第8期34卷 1116-1121页

作者：马烈华王贻芳张家文 Logan Lebanowski Viktor Pě 陈进谢宇广韩纪峰张清民钱森宁哲 Institute of High Energy Physics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Department of Physics University of Houston Charles University Faculty of Mathematics and Physics

This study uses daya bay RPCs operating in streamer mode to investigate gas mixtures of at least 50% argon, at most 6% isobutane, and with small amounts of SF6. Isobutane is reduced to 2% without degradation of performance, and SF6 reduces the noise rate and current, as well as the signal size. This study provides quantitative relationships between basic RPC operating parameters and various gas compositions.

关键词： RPC gas composition streamer isobutane daya bay SF6

Study of monthly variations in primary production and their relationships with environmental factors in the daya bay based on a general additive model

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Acta Oceanologica Sinica 2018年第12期37卷 107-117页

作者： KANG Jianhua HUANG Hao LI Weiwen LIN Yili CHEN Xingqun Laboratory of Marine Biology and Ecology Third Institute of Oceanography Ministry of Natural Resources

In this study, the horizontal and vertical distribution of primary production(PP) and its monthly variations were described based on field data collected from the daya bay in January–December of 2016. The relationships between PP and environmental factors were analyzed using a general additive model(GAM). Significant seasonal differences were observed in the horizontal distribution of PP, while vertical distribution showed a relatively consistent unimodal pattern. The monthly average PP(calculated by carbon) ranged from 48.03 to 390.56 mg/(m~2·h),with an annual average of 182.77 mg/(m~2·h). The highest PP was observed in May and the lowest in ***, the overall trend in PP was spring>summer>winter>autumn, and spring PP was approximately three times that of autumn PP. GAM analysis revealed that temperature, bottom salinity, phytoplankton, and photosynthetically active radiation(PAR) had no significant relationships with PP, while longitude, depth, surface salinity, chlorophyll a(Chl a) and transparency were significantly correlated with PP. Overall, the results presented herein indicate that monsoonal changes and terrestrial and offshore water systems have crucial effects on environmental factors that are associated with PP changes.

关键词： primary production environmental factors general additive model monthly variations daya bay

Onsite data processing and monitoring for the daya bay experiment

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Chinese Physics C 2014年第8期38卷 48-52页

作者：刘颖彪何苗刘北江王萌马秋梅齐法制曾珊 Institute of High Energy Physics Chinese Academy of Sciences Chinese University of Hong Kong Department of Physics The University of Hong Kong Shandong University

The daya bay Reactor Neutrino Experiment started running on September 23, 2011. The offiine computing environment, consisting of 11 servers at daya bay, was built to process onsite data. With the current computing ability, onsite data processing is running smoothly. The Performance Quality Monitoring system （PQM） has been developed to monitor the detector performance and data quality. Its main feature is the ability to efficiently process multiple data streams from the three experimental halls. The PQM processes raw data files from the daya bay data acquisition system, generates and publishes histograms via a graphical web interface by executing the userdefined algorithm modules, and saves the histograms for permanent storage. The fact that the whole process takes only around 40 minutes makes it valuable for the shift crew to monitor the running status of all the sub-detectors and the data quality.

关键词： multi-data-stream data quality daya bay

Overview on neutrinos and the daya bay experiment

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Frontiers of physics 2013年第3期8卷 242-247页

作者： Miao He Division for Experimental Physics The Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

Neutrinos are elementary particles in the Standard Model. Neutrino oscillation is a quantum mechanical phenomenon beyond the Standard Model. Neutrino oscillation can be described by two independent mass-squared differences △m21^2, △m31^2 （or △m32^2） and a 3× 3 unitary matrix, containing three mixing angles θ12, θ23, θ13, and one charge-parity （CP） phase. θ12 is about 34° and determined by solar neutrino experiments and the reactor neutrino experiment KamLAND. θ23 is about 45° and determined by atmospheric neutrino experiments and accelerator neutrino experiments. 013 can be measured by either accelerator or reactor neutrino experiments. On Mar. 8, 2012, the daya bay Reactor Neutrino Experiment reported the first observation of non-zero 013 with 5.2 standard deviations. In June, with 2.5× previous data, daya bay improved the measurement of sin2 2013 = 0.089 ± 0.010（stat）± 0.005（syst）.

关键词： neutrino oscillation neutrino mixing daya bay

PMT waveform modeling at the daya bay experiment

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Chinese Physics C 2012年第8期36卷 733-741页

作者： Sren JETTER Dan DWYER 蒋文奇刘大为王贻芳王志民温良剑 Institute of High Energy Physics Chinese Academy of Sciences California Institute of Technology Pasadena CA 91125 USA University of Illinois at Urbana-Champaign Urbana IL 61801 USA

Detailed measurements of Hamamatsu R5912 photomultiplier signals are presented, including the single photoelectron charge response, waveform shape, nonlinearity, saturation, overshoot, oscillation, prepulsing, and afterpulsing. The results were used to build a detailed model of the PMT signal characteristics over a wide range of light intensities. Including the PMT model in simulated daya bay particle interactions shows no significant systematic effects that are detrimental to the experimental sensitivity.

关键词： PMT model simulation daya bay

Mechanisms of high-frequency dinoflagellate blooms of Scrippsiella trochoidea in daya bay,South China Sea

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Journal of Oceanology and Limnology 2021年第4期39卷 1293-1304页

作者： Yuan TIAN Simin HU Xianzhi LIN Hui HUANG Xingyu SONG Yan YAN Xuedong XIE Tao LI Sheng LIU Key Laboratory of Tropical Marine Bio-resources and Ecology Guangdong Provincial Key Laboratory of Applied Marine BiologySouth China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China Tropical Marine Biological Research Station in Hainan Chinese Academy of SciencesSanya 572000China Nansha Marine Ecological and Environmental Research Station Chinese Academy of SciencesGuangzhou 510301China Guangdong Ocean and Fishery Environment Monitoring and Forecasting Center Guangzhou 510222China

Harmful algal blooms(HABs),such as dinoflagellate blooms,have adverse eff ects on coastal water environments,causing seafood contamination and aquaculture economic *** on historical HAB records data(1983-2017)and phytoplankton data(1982-2008),field investigation and laboratory experiments on frequently bloomed dinoflagellate species,we analyzed the possible mechanisms of high frequency dinoflagellate blooms in daya bay,South China *** HAB records data show that the proportion of dinoflagellate blooms increased from 15% before 1994 to 77.27% after *** bloom occurred mostly in summer(57.58%)in Yaling bay(76.92%).The species inducing dinoflagellate blooms tended to be singular over time,with high proportion of Scrippsiella trochoidea(42.86%-88.88%).Laboratory experiment and field investigation of *** bloom showed that this species grew rapidly at 30℃ and 32.1℃(r=0.47,Pbay was aff ected by nearby nuclear plant effluent,which favored the *** ***,nearly 70% of *** blooms occurred in about 7 days after local spring tide and strong wind(wind velocity>7 m/s),which disturbed the resting cysts in the sediment and bring them into surface *** into account of environmental parameters,algae source,and atmospheric conditions,the probable mechanism of *** bloom could be *** cysts were resuspended by the spring tide or strong wind,germinated at the bottom layer,reproduced rapidly at higher temperature,and then aggregated in the inner bay(Yaling bay),resulting the frequent *** *** the influences of global warming and human activities,it should be taken more attention that dinoflagellate blooms might increase along the coastal waters.

关键词： harmful algal blooms dinoflagellate daya bay Scrippsiella trochoidea

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