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Using Natural Radionuclides to Trace Sources of Suspended Particles in the Lower Reaches of the Yellow River

Journal of Ocean University of China 2024年第1期23卷 99-108页

作者： ZHANG Han BURNETT CWilliam ZHANG Xiaojie ZHAO Shibin yang disong NAN Haiming YU Zhigang XU Bochao 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 Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahasseeFL 32306USA North China Sea Environmental Monitoring Center State Oceanic AdministrationKey Laboratory of Ecological Prewarning and Protection of Bohai SeaMNRQingdao 266033China Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation Qingdao 266033China

Natural radionuclides are powerful tools for understanding the sources and fate of suspended particulate matter(SPM).Particulate matter with different particle sizes behaves differently with respect to adsorption and *** analyzed the activi-ties and distribution characteristics of multiple natural radionuclides(238U,226Ra,40K,228Ra,7Be and 210Pbex)on size-fractionated SPM at the Lijin Hydrographic Station(Huanghe or Yellow River)every month over a one-year *** showed that medium silt(16–32µm)was the main *** expected,the activity of each radionuclide decreased with an increase of particle *** examined the sources of SPM with different particle sizes using activity ratios of 226Ra/238U,228Ra/226Ra,40K/238U and 7Be/210Pbex,and concluded that SPM with different particle sizes originated from different *** results indicate that fine SPM(32µm)was mainly derived from resuspension of riverbed *** high runoff periods,the concentration of SPM increased significantly,and the pro-portion of fine particles originating upstream *** occurring radioactive isotopes,especially on size-fractionated par-ticles,are therefore seen as useful tracers to understand the sources and behaviors of riverine particles transported from land to sea.

关键词： the Yellow River suspended particulate matter size-fractions radionuclides sediment sources water elutriator

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Using Rn-222 to Study Human-Regulated River Water-Sediment Input Event in the Estuary

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Journal of Ocean University of China 2023年第6期22卷 1464-1472页

作者： XU Yuezhi XIAO Liu GAO Maosheng yang disong ZHAO Shibin XU Haowei WANG Lisha ZHANG Xiaojie College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education and Frontiers Science Center for Deep Ocean Multispheres and Earth SystemOcean University of ChinaQingdao 266100China SGS-CSTC Standard Technical Service(Qingdao)Co. Ltd.Qingdao 266100China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China

The implementation of the water sediment regulation scheme(WSRS)is a typical example of artificially controlling land-source *** WSRS,the water discharge of the Yellow River will increase significantly,and so will the input of terri-genous *** this study,we used a natural geochemical tracer 222Rn to quantify terrestrial inputs under the influence of the 2014 WSRS in the Yellow River *** results indicated that during WSRS the concentration of 222Rn in the estuary increased by about four times than in the period before *** high-level 222Rn plume disappeared quickly after WSRS,indicating that 222Rn has a very short‘memory effect’in the *** on the investigation conducted from 2015 to 2016,the concentration of 222Rn tended to be stable in the lower reaches of the Yellow *** WSRS,the concentrations of 222Rn in the river water in-creased sharply at about 3–5 times greater than in the non-WSRS *** on the 222Rn mass balance model,the fluxes of 222Rn caused by submarine groundwater discharge(SGD)were estimated to be(3.5±1.7)×10^(3),(11±3.9)×10^(3),and(5.2±1.9)×10^(3)dpm m^(-2)d^(-1)in the periods before,during,and after WSRS,*** finding indicated that SGD was the major source of 222Rn in the Yellow River Estuary,which can be significantly increased during ***,the SGD-associated nutrient fluxes were estimated to be 9.8×10^(3),2.5×102,and 1.1×10^(4)μmolm^(-2)d^(-1)for dissolved inorganic nitrogen,phosphorus,and silicon,respectively,during WSRS or about 2–40 times greater than during the non-WSRS period.

关键词： 222Rn submarine groundwater discharge water sediment regulation scheme nutrient Yellow River

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Using radium isotopes to quantify submarine groundwater discharge at different scales in the Huanghe River Estuary,China

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Acta Oceanologica Sinica 2023年第8期42卷 32-39页

作者： Haowei Xu disong yang Xiaoyi Guo Maosheng Gao Guangquan Chen Diansheng Ji Shengtao Chen Huaming Yu Bochao Xu Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China North China Sea Environmental Monitoring Center of State Oceanic Administration/Key Laboratory of Ecological Prewarning and Protection of Bohai Sea Ministry of Natural ResourcesQingdao 266033China Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation Qingdao 266033China Qingdao Institute of Marine Geology Qingdao 266071China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Yantai Marine Center Ministry of Natural ResourcesYantai 264003China North China Sea Ecological Center Ministry of Natural ResourcesQingdao 266033China Key Laboratory of Ecological Prewarning and Protection of Bohai Sea Ministry of Natural ResourcesQingdao 266033China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Sanya Oceanographic Institution Ocean University of ChinaSanya 572000China

As an important land-ocean interaction process,submarine groundwater discharge(SGD)is composed of multiple dynamical processes at different scales and plays an important role in the study of coastal ocean geochemical ***,most of the existing studies focus on the quantification of the total groundwater discharge,few studies are about the differentiation and quantification of groundwater discharge processes at different scales(i.e.,short-scale SGD and long-scale SGD).As a world-class river,the Huanghe River is highly turbid and heavily regulated by *** natural and anthropogenic factors have a significant impact on groundwater discharge processes in the Huanghe River Estuary(HRE).In this study,the distribution patterns of the natural geochemical tracer radium isotopes(^(224)Ra and^(223)Ra)and other hydrological parameters in the HRE were investigated during four *** solving the mass balance of^(224)Ra and^(223)Ra in the HRE,the long-scale SGD flux was quantified as 0.01−0.19 m/d,and the short-scale SGD flux was 0.03−0.04 m/*** rate of short-scale SGD remained essentially constant among seasons,while the rate of long-scale SGD varied considerably at different periods and showed a synchronous trend with the variation of river *** results of this study are significant for understanding the SGD dynamics in the HRE and the contribution of SGD to the ocean geochemical budgets.

关键词： radium isotopes submarine groundwater discharge Huanghe River Estuary

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Submarine groundwater discharge and benthic biogeochemical zonation in the Huanghe River Estuary

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Acta Oceanologica Sinica 2022年第1期41卷 11-20页

作者： Guangquan Chen Bochao Xu Shibin Zhao disong yang William C.Burnett Shaobo Diao Maosheng Gao Xingyong Xu Lisha Wang Key Laboratory of Coastal Science and Integrated Management First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China Marine Ecology and Environmental Science Laboratory Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee 32306USA Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China

Submarine groundwater discharge(SGD)has received increasing attention by studies on coastal areas;however,its effects on biogeochemical zonation have not been investigated to *** Huanghe River Estuary(HRE)is a world class river estuary with high turbidity,and heavy human *** study investigated how SGD is related to the benthic biogeochemistry of the *** on the distribution of several parameters(e.g.,salinity,temperature,dissolved oxygen(DO)levels,p H,radium isotopes,and nutrients),the HRE was subdivided into six different zones,and the SGD fluxes within each zone were quantified and *** highest SGD flux was found in the northwest nearshore zone,where it was more than one order of magnitude higher than in the offshore *** SGD resulted in low DO and p H,but high nutrient levels in the benthic boundary *** southeast nearshore zone was also characterized by high SGD flux,but benthic waters were more oxic because of the dominating inputs by the Huanghe *** data suggest that such a zonation would help to understand benthic biogeochemical *** SGD may not only contribute to the estuarine nutrient budget,but may also contribute to the formation of hypoxia and acidification.

关键词： SGD zonation benthic biogeochemistry radium isotopes Huanghe River Estuary

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海底地下水排放对南黄海沿岸海水细菌群落结构的影响

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环境科学学报 2021年第12期41卷 4942-4952页

作者：张胜东赵世彬陈烨杨迪松许博超甄毓中国海洋大学海洋环境与生态教育部重点实验室青岛266100 青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室青岛266237 中国海洋大学环境科学与工程学院青岛266100 中国海洋大学化学化工学院青岛266100 深海圈层与地球系统前沿科学中心和海洋化学理论与工程技术教育部重点实验室中国海洋大学青岛266100

在南黄海沿岸岸滩采集海水样品,将同位素地球化学与分子生物学技术相结合,探讨海底地下水排放(submarine groundwater discharge,SGD)对沿岸海水微生物群落结构的影响.结果表明,南黄海沿岸水体微生物优势类群为变形菌门、放线菌门、拟... 详细信息

在南黄海沿岸岸滩采集海水样品,将同位素地球化学与分子生物学技术相结合,探讨海底地下水排放(submarine groundwater discharge,SGD)对沿岸海水微生物群落结构的影响.结果表明,南黄海沿岸水体微生物优势类群为变形菌门、放线菌门、拟杆菌门、蓝细菌门、疣微菌门、厚壁菌门等.海水中较高浓度的镭同位素活度极有可能是由近岸海底地下水排放过程导致.沿岸海水中的^(224)Ra活度与营养盐浓度、微生物群落的多样性及丰富度具有相对同步的变化规律.溶解氧对海水中的细菌群落结构具有显著影响(p<0.05),海底地下水排放输入的高浓度溶解无机氮、溶解硅酸盐可能是影响沿岸海水中细菌群落结构特征的主要因素之一.本研究表明,海底地下水排放对沿岸微生物群落结构的影响是不可忽视的.

关键词：海底地下水排放微生物群落同位素地球化学

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Using Rn-222 to Study Human-Regulated River Water-Sediment Input Event in the Estuary

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Journal of Ocean University of China 2023年第6期

作者： XU Yuezhi XIAO Liu GAO Maosheng yang disong ZHAO Shibin XU Haowei WANG Lisha ZHANG Xiaojie

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Data-driven Estimation of Cloud Effects on Surface Irradiance at Xianghe,a Suburban Site on the North China Plain

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Advances in Atmospheric Sciences 2022年第12期39卷 2213-2223页

作者： Mengqi LIU Jinqiang ZHANG Hongrong SHI disong FU Xiang'ao XIA Key Laboratory of Atmospheric Sounding Chengdu University of Information TechnologyChengdu 610225China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044China

Clouds are a dominant modulator of the energy *** cloud shortwave radiative effect at the surface(CRE)is closely related to the cloud macro-and micro-physical *** observation of surface irradiance and cloud properties are needed to narrow uncertainties in *** this study,1-min irradiance and Total Sky Imager measurements from 2005 to 2009 at Xianghe in North China Plain are used to estimate cloud types,evaluate cloud fraction(CF),and quantify the sensitivities of surface irradiance with respect to changes in CF whether clouds obscure the sun or *** annual mean CF is 0.50,further noting that CF exhibits a distinct seasonal variation,with a minimum in winter(0.37)and maximum in summer(0.68).Cumulus occurs more frequently in summer(32%),which is close to the sum of the occurrence of stratus and *** annual CRE is–54.4 W m^(–2),with seasonal values ranging from^(–2)9.5 W m^(–2)in winter and–78.2 W m^(–2)in *** clouds do not obscure the sun,CF is a dominant factor affecting diffuse irradiance,which in turn affects global *** is a positive linear relationship between CF and CRE under sun-unobscured conditions,the mean sensitivity of CRE for each CF 0.1 increase is about 1.2 W m^(–2)[79.5°

关键词： cloud radiative effect solar radiation cloud fraction cloud-radiation interaction

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A Thorough Evaluation of the Passive Microwave Radiometer Measurements onboard Three Fengyun-3 Satellites

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Journal of Meteorological Research 2023年第4期37卷 573-588页

作者： Xinran XIA Wenying HE Shengli WU disong FU Wei SHAO Peng ZHANG Xiangao XIA School of Hydrology and Water Resources Nanjing University of Information Science&TechnologyNanjing 210044 Key Laboratory of Middle Atmosphere and Global Environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 National Satellite Meteorology Centre China Meteorological AdministrationBeijing 100081 University of Chinese Academy of Sciences Beijing 101408

Microwave Radiometer Imager(MWRI) is a key payload of China’s second generation polar meteorological satellite, i.e., Fengyun-3 series(FY-3). Up to now, 5 satellites including FY-3A(2008), FY-3B(2010), FY-3C(2013), FY-3D(2018), and FY-3E(2021) have been launched successfully to provide multiwavelength, all-weather, and global data for decades. Much progress has been made on the calibration of MWRI and a recalibrated MWRI brightness temperature(BT) product(V2) was recently released. This study thoroughly evaluates the accuracy of this new product from FY-3B, 3C, and 3D by using the simultaneous collocated Global Precipitation Measurement(GPM)Microwave Imager(GMI) measurements as a reference. The results show that the mean biases(MBEs) of the BT between MWRI and GMI are generally less than 0.5 K and the root mean squares(RMSs) between them are less than1.5 K. The previous notable ascending and descending difference of the MWRI has disappeared. This indicates that the new MWRI recalibration procedure is very effective in removing potential errors associated with the emission of the hot-load reflector. Analysis of the dependence of MBE on the latitude and earth scene temperature shows that MBE decreases with decreasing latitude over ocean. Furthermore, MBE over ocean decreases linearly with increasing scene temperature for almost all channels, whereas this does not occur over land. A linear regression fitting is then used to modify MWRI, which can reduce the MBE over ocean to be within 0.2 K. The standard deviation of error of GMI, FY-3B, and FY-3D MWRI BT data derived by using the three-cornered hat method(TCH) shows that GMI has the best overall performance over ocean except at 10.65 GHz where its standard deviation of error is slightly larger than that of FY-3D. Over land, the standard deviation of error of FY-3D is the lowest at almost all channels except at 89V. MWRI onboard FY-3 series satellites would serve as an important passive microwave radiometer member of t

关键词： Microwave Radiometer Imager(MWRI) Global Precipitation Measurement(GPM)Microwave Imager(GMI) brightness temperature(BT) the three-cornered hat method(TCH)

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Fengyun-4 Geostationary Satellite-Based Solar Energy Nowcasting System and Its Application in North China

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Advances in Atmospheric Sciences 2022年第8期39卷 1316-1328页

作者： Chunlin HUANG Hongrong SHI Ling GAO Mengqi LIU Qixiang CHEN disong FU Shu WANG Yuan YUAN Xiang′ao XIA Key Laboratory of Aerospace Thermophysics Ministry of Industry and Information TechnologyHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044China National Satellite Meteorological Center China Meteorological AdministrationBeijing 100192China Key Laboratory of Atmospheric Sounding Chengdu University of Information TechnologyChengdu 610225China State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems China Electric Power Research Institute(CEPRI)Beijing 100192China Key Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Surface solar irradiance(SSI)nowcasting(0-3 h)is an effective way to overcome the intermittency of solar energy and to ensure the safe operation of grid-connected solar power *** this study,an SSI estimate and nowcasting system was established using the near-infrared channel of Fengyun-4A(FY-4A)geostationary *** system is composed of two key components:The first is a hybrid SSI estimation method combining a physical clear-sky model and an empirical cloudy-sky *** second component is the SSI nowcasting model,the core of which is the derivation of the cloud motion vector(CMV)using the block-matching *** goal of simultaneous estimation and nowcasting of global horizontal irradiance(GHI)and direct normal irradiance(DNI)is *** system was evaluated under different sky conditions using SSI measurements at Xianghe,a radiation station in the North China *** results show that the accuracy of GHI estimation is higher than that of DNI estimation,with a normalized root-mean-square error(nRMSE)of 22.4%relative to 45.4%.The nRMSE of forecasting GHI and DNI at 30-180 min ahead varied within 25.1%-30.8%and 48.1%-53.4%,*** discrepancy of SSI estimation depends on cloud occurrence frequency and shows a seasonal pattern,being lower in spring-summer and higher in *** FY-4A has great potential in supporting SSI nowcasting,which promotes the development of photovoltaic energy and the reduction of carbon emissions in *** system can be improved further if calibration of the empirical method is improved.

关键词： Fengyun-4A surface solar irradiance estimates and forecasting cloud motion block-matching

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Estimation of PM2.5 Mass Concentration from Visibility

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Advances in Atmospheric Sciences 2020年第7期37卷 671-678页

作者： Denghui JI Zhaoze DENG Xiaoyu SUN Liang RAN Xiangao XIA disong FU Zijue SONG Pucai WANG Yunfei WU Ping TIAN Mengyu HUANG Key Laboratory of Middle Atmosphere and Global environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Regional Climate-Environment for Temperate East Asia(RCE-TEA) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Beijing Weather Modification Office Beijing 100089China Xianghe Observatory of Whole Atmosphere Institute of Atmospheric PhysicsChinese Academy of SciencesXianghe 065400China University of Chinese Academy of Sciences Beijing 100049China

Aerosols in the atmosphere not only degrade visibility,but are also detrimental to human health and *** order to develop a method to estimate PM2.5 mass concentration from the widely measured visibility,a field campaign was conducted in Southwest China in January ***,ambient relative humidity(RH),PM2.5 mass concentrations and scattering coefficients of dry particles were *** the campaign,two pollution episodes,i.e.,from 4-9 January and from 10-16 January,were *** of the two episodes could be divided into two *** aerosol hygroscopicity was found during the first period,when RH was higher than 80%at most of the time,and sometimes even approached 100%.The second period experienced a relatively dry but more polluted condition and aerosol hygroscopicity was lower than that during the first *** empirical relationship between PM2.5 mass concentration and visibility(ambient aerosol extinction)under different RH conditions could thus be *** on the empirical relationship,PM2.5 mass concentration could be well estimated from visibility and *** method will be useful for remote sensing of PM2.5 mass concentration.

关键词： concentration. pollution visibility

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