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Contributions of shortwave radiation to the formation of temperature inversions in the Bay of Bengal and eastern equatorial Indian Ocean:A modeling approach

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Acta Oceanologica Sinica 2022年第9期41卷 19-37页

作者： K M Azam Chowdhury Wensheng Jiang changwei bian Guimei Liu Md Kawser Ahmed Shaila Akhter College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao266100China Department of Oceanography&International Centre for Ocean Governance(ICOG) University of DhakaDhaka1000Bangladesh National Marine Environmental Forecasting Center Beijing100081China Key Lab of Marine Environment and Ecology of Ministry of Education Ocean University of ChinaQingdao266100China Frontiers Science Center for Deep Ocean Multispheres and Earth System(FDOMES) Ocean University of ChinaQingdao266100China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao266237China Bangladesh Betar Ministry of Information and BroadcastingGovernment of the People’s Republic of BangladeshDhaka1207Bangladesh

Variations in incoming shortwave radiation influence the net surface heat flux,contributing to the formation of a temperature inversion.The effects of shortwave radiation on the temperature inversions in the Bay of Bengal and eastern equatorial Indian Ocean have never been investigated.Thus,a high-resolution(horizontal resolution of 0.07°×0.07° with 50 vertical layers) Regional Ocean Modeling System(ROMS) model is utilized to quantify the contributions of shortwave radiation to the temperature inversions in the study domain.Analyses of the mixed layer heat and salt budgets are performed,and different model simulations are compared.The model results suggest that a 30% change in shortwave radiation can change approximately 3% of the temperature inversion area in the Bay of Bengal.Low shortwave radiation reduces the net surface heat flux and cools the mixed layer substantially;it also reduces the evaporation rate,causing less evaporative water vapor losses from the ocean than the typical situation,and ultimately enhances haline stratification.Thus,the rudimentary outcome of this research is that a decrease in shortwave radiation produces more temperature inversion in the study region,which is primarily driven by the net surface cooling and supported by the intensive haline stratification.Moreover,low shortwave radiation eventually intensifies the temperature inversion layer by thickening the barrier layer.This study could be an important reference for predicting how the Indian Ocean climate will respond to future changes in shortwave radiation.

关键词： mixed layer cooling haline stratification temperature inversion ROMS model shortwave radiation Bay of Bengal eastern equatorial Indian Ocean

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近20年黄河口营养盐结构演变及现状研究

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渔业科学进展 2024年第2期45卷 1-13页

作者：吴傲琳钟正浩于松眭晓超姚晓邹立王涛边昌伟江文胜中国海洋大学教育部海洋环境与生态重点实验室山东青岛266100 山东省东营生态环境监测中心山东东营257091 中国海洋大学深海圈层与地球系统前沿科学中心和物理海洋学实验室山东青岛266100

追踪和把握黄河口海域的营养盐分布和历史变化,不仅是西北太平洋边缘海域生源要素地球化学循环的关键内容,而且对区域富营养化和环境质量监管、污染综合整治具有重要意义。本研究延续该海域的营养盐及相关环境要素的现状调查,整理近20... 详细信息

追踪和把握黄河口海域的营养盐分布和历史变化,不仅是西北太平洋边缘海域生源要素地球化学循环的关键内容,而且对区域富营养化和环境质量监管、污染综合整治具有重要意义。本研究延续该海域的营养盐及相关环境要素的现状调查,整理近20年的历史资料,分析黄河口营养盐组成和结构的发展趋势,揭示黄河口营养盐现状的主要影响因素。结果显示,溶解无机氮(DIN)、活性磷酸盐(DIP)和硅酸盐浓度总体由黄河口分别向北和向东南逐渐降低,但其组成和分布的时空差异较大,河口口门外出现异常高值;硝酸氮是DIN的主要组分,各组分相对贡献变化较大,都出现超过80%贡献率的状况;氮磷比(N/P)较高,最低为43.7。近20年黄河口海域DIN变化大致分为3段,2006年前逐渐增加到最高浓度(60μmol/L),到2009年逐渐降至30μmol/L,之后到2023年在浓度小于30μmol/L的范围内波动;DIP浓度在2005年和2013年出现峰值,2006—2008年浓度较高,其他年度浓度较低。除2000年,黄河口N/P不低于25,2010年以来呈现持续升高的趋势。主成分分析结果表明,营养盐组成能显著表征黄河口水质特征。黄河口海域营养盐组成和分布的极不均匀性以及高N/P,使得黄河口水环境质量情势严峻。

关键词：黄河口营养盐组成和结构历史变化

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Numerieal Prediction of Storm Surge in the Qingdao Area Under the Impact of Climate Change

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Journal of Ocean University of China 2014年第4期13卷 539-551页

作者： FENG Jianlong JIANG Wensheng bian changwei Physical Oceanography Laboratory Ocean University of China Laboratory of Marine Environment and Ecology Ocean University of China

A typhoon-induced storm surge simulation system was developed for the Qingdao area, including a typhoon diagnostic model for the generation of wind and pressure fields and a 2D Advanced Circulation(ADCIRC) model for simulating the associated storm surge with a 200 m resolution along the Qingdao coastline. The system was validated by an extreme surge event Typhoon Mamie(8509) and the parameters of Typhoon Mamie were used to investigate the sensitivity of typhoon paths to Qingdao storm surges with four selected paths: the paths of Typhoons Mamie(8509), Opal, 3921 and 2413, the selection being made according to their relative position to Qingdao. Experiments based on the Typhoon Mamie(8509) storm surge were also conducted to study the possible influences of future climate changes, including the sea level rise and sea surface temperature(SST) rise, on storm surges along the Qingdao coast. Storm surge conditions under both present day and future(the end of the 21 st century) climate scenarios associated with the four selected paths were simulated. The results show that with the same intensity, when typhoons follow the paths of 3921 and 2413, they would lead to the most serious disasters in different areas of Qingdao. Sea level and SST affect storm surges in different ways: sea level rise affects storm surge mainly through its influence on the tide amplitude, while the increased SST has direct impact on the intensity of the surges. The possible maximum risk of storm surges in 2100 in the Qingdao area caused by typhoons like Mamie(8509) was also estimated in this study.

关键词：未来气候变化青岛地区风暴潮海平面上升台风路径预测海洋表面温度仿真系统

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The Suspended Sediment Concentration Distribution in the Bohai Sea,Yellow Sea and East China Sea

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Journal of Ocean University of China 2013年第3期12卷 345-354页

作者： bian changwei JIANG Wensheng Richard J.Greatbatch DING Hui Physical Oceanography Laboratory Ocean University of China Helmholtz Centre for Ocean Research at Kiel University (GEOMAR)

The distribution of the suspended sediment concentration(SSC) in the Bohai Sea,Yellow Sea and East China Sea(BYECS) is studied based on the observed turbidity data and model simulation results.The observed turbidity results show that(i) the highest SSC is found in the coastal areas while in the outer shelf sea areas turbid water is much more difficult to observe,(ii) the surface layer SSC is much lower than the bottom layer SSC and(iii) the winter SSC is higher than the summer SSC.The Regional Ocean Modeling System(ROMS) is used to simulate the SSC distribution in the BYECS.A comparison between the modeled SSC and the observed SSC in the BYECS shows that the modeled SSC can reproduce the principal features of the SSC distribution in the BYECS.The dynamic mechanisms of the sediment erosion and transport processes are studied based on the modeled results.The horizontal distribution of the SSC in the BYECS is mainly determined by the current-wave induced bottom stress and the fine-grain sediment distribution.The current-induced bottom stress is much higher than the wave-induced bottom stress,which means the tidal currents play a more significant role in the sediment resuspension than the wind waves.The vertical mixing strength is studied based on the mixed layer depth and the turbulent kinetic energy distribution in the BYECS.The strong winter time vertical mixing,which is mainly caused by the strong wind stress and surface cooling,leads to high surface layer SSC in winter.High surface layer SSC in summer is restricted in the coastal areas.

关键词：泥沙浓度分布沉积物再悬浮东中国海渤海黄海模型模拟建模系统 SSC

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Particle Size Distributions and Organic-Inorganic Compositions of Suspended Particulate Matters Around the Bohai Strait

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Journal of Ocean University of China 2017年第1期16卷 25-34页

作者： WANG Xiao bian changwei BI Rong JIANG Wensheng ZHANG Hua ZHANG Xueqing Key Laboratory of Marine Environment and Ecology Ocean University of ChinaQingdao 266100P.R.China Key Laboratory of Physical Oceanography Ocean University of ChinaQingdao 266003P.R.China Key Laboratory of Marine Chemistry Theory and Technology Ocean University of ChinaQingdao 266100P.R.China Yantai Institute of Coastal Zone Research Chinese Academy of ScienceYantai 264003P.R.China

Laser in situ scattering and transmissometry(LISST) significantly improves our ability to assess particle size distribu-tion(PSD) in seawater, while wide-ranging measurements of the organic-inorganic compositions of suspended particulate matters(SPM) are still difficult by using traditional methods such as microscopy. In this study, PSD properties and SPM compositions around the Bohai Strait(China) were investigated based on the measurements by LISST in combination with hydro-biological parameters collected from a field survey in summer 2014. Four typical PSD shapes were found in the region, namely right-peak, left-peak, dou-ble-peak and negative-skew shapes. The double-peak and negative-skew shapes may interconvert into each other along with strong hydrodynamic variation. In the upper layer of the Bohai Sea, organic particles were in the majority, with inorganic particles rarely observed. In the bottom layer, SPM were the mixture of organic and inorganic matters. LISST provided valuable baseline information on size-resolved organic-inorganic compositions of SPM: the size of organic particles mainly ranged from 4 to 20 μm and 40 to 100 μm, while most SPM ranging from 20 to 40 μm were composed of inorganic sediment.

关键词： particle size distribution phytoplankton sediment field survey Bohai Sea

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Identification and analysis of a minority fraction in a U87 cell line Do side-population cells represent bona fide stem cell-like cancer cells?

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Neural Regeneration Research 2009年第11期4卷 805-813页

作者： changwei Gu Qingfang Sun Jiang Zhu Liuguan bian Weiguo Zhao Jiankang Shen HengGao Dongxia Feng l lnternational Cooperation of Neuro-centre in Jiangyin People's HospitaI Jiangyin 214400 Jiangsu Province China Department of Neurosurgery Ruijin Hspitaal School of Medicine Shanghai Jiao Tong University Shanghai 200025 China Shanghai Institute of Hematology Ruijin Hospital Shanghai 200025 China

BACKGROUND： Overwhelming evidence suggests that tumor bulks are comprised of differentiated tumor cells and cancer stem cells （CSCs）. The stem cell-like side-population （SP） cells account for a minor fraction of the total tumor cells, yet are apparently the cells capable of tumor initiation, growth, maintenance, and recurrence. OBJECTIVE： To identify potential stem cell-like cancer cells in a U87 human brain glioma cell line on the basis of dye efflux, clone formation, and multi-drug resistance capacity. DESIGN, TIME AND SETTING： The cellular and molecular biology experiment was performed at the Laboratory of Shanghai Institute of Hematology and Laboratory of Shanghai Institute of Endocrinology in Ruijin Hospital; in vivo contrast observational animal trial was performed at Experimental Animal Center, School of Medicine, Shanghai Jiao Tong University from June 2007 to May 2008. MATERIALS： The U87 cell line was provided by the Shanghai Institute of Cancer Research, Chinese Academy of Science; DMEM/F12 （1 ： 1） and fetal bovine serum were purchased from Gibco Invitrogen, USA; human recombinant basic fibroblast growth factors were purchased from BD Bioscience, USA; Hoechst 33342, Verapamil, and methyl thiazolyl tetrazolium were purchased from Sigma, USA; phycoerythrin-labeled anti-human-CD133 was purchased from Milteny Biotec, Germany; SYBR PrimeScriptTM RT-PCR kit was purchased from TaKaRa Biotechnology, Dalian, China. METHODS： Monolayer cultured cells were harvested by 0.25% Trypsin-EDTA and suspended at a 1 ×10^6/mL dilution in PBS containing 2% FBS, and were stained with Hoechst 33342 dye, either alone or in combination with Verapamil. Following fluorescence-activated cell sorting, SP and non-SP subsets were cultivated with serum-containing （DMEM plus 10% fetal bovine serum） or serum-free culture medium [DMEM/F12 （1： 1）＋ 1× B27 supplement ＋ 10 ng/mL basic fibroblast growth factors ＋ 1× L-glutamine] to determine growth characteristics in vitro. Finally, single free U87 cells and subsets （SP or non-SP cells） were

关键词： cancer stem cells tumor-initiating cells side population glioma CD133

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渤海海峡沉积物输运的参数化计算

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海洋学报 2020年第3期42卷 83-96页

作者：齐富康边昌伟徐景平中国海洋大学海洋地球科学学院山东青岛266100 中国海洋大学物理海洋教育部重点实验室山东青岛266100 南方科技大学海洋科学与工程系广东深圳518055 青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室山东青岛266061

本文以2018年冬季渤海海峡两个站位的定点连续观测数据为基础,使用一维参数化方案,计算了观测站位底边界层内的水平悬浮物输运通量以及推移质输运量。在参数化方案中,简化的一维对流扩散方程被用于计算底边界层内的垂向悬浮物浓度。为... 详细信息

本文以2018年冬季渤海海峡两个站位的定点连续观测数据为基础,使用一维参数化方案,计算了观测站位底边界层内的水平悬浮物输运通量以及推移质输运量。在参数化方案中,简化的一维对流扩散方程被用于计算底边界层内的垂向悬浮物浓度。为了验证参数化方案的可靠性,本文基于观测数据对比了两种底剪切应力计算模型、四种临界起动剪切应力计算方法和两种一维对流扩散方程解法。对比结果表明:(1)不同模型计算的底剪切应力结果相近;(2)临界起动剪切应力受到颗粒间黏性作用的影响;(3)一维对流扩散方程的求解过程需要考虑沉积物浓度的分层效应和不同粒级颗粒临界起动剪切应力的差异。基于上述对比结果确定的最优参数化方案,进一步计算了观测站位的沉积物输运量:(1)在有再悬浮的时段,距底5 m内的水平悬浮物通量占全水深悬浮物通量的比例(T01站约为21%,T02站约为17%)显著高于相同层位水通量的占比;(2)依据参数化方案估算的冬季平均的悬浮物通量比忽略底边界层悬浮物浓度垂向变化的传统方法结果高约16%;(3)推移质输运量比悬移质输运量约低两个数量级。

关键词：底边界层悬浮物通量推移质输运量渤海海峡

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一种新的纤维增强水泥基材料塑性开裂试验方法

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建筑技术 2005年第6期36卷 465-467页

作者：姜国庆卞荣兵孙伟缪昌文东南大学材料科学与工程系江苏省建筑科学研究院有限公司 210008

水泥基材料塑性开裂试验的新方法,采用试模外形尺寸为600mm×600mm×70mm,分两层浇筑,基层为C60高强混凝土,其间均匀分布垂直于底部的螺杆,上层可用来做水泥胶砂或水泥净浆试验,将其置于试验室进行恶劣环境条件试验,观察塑性开裂情况。... 详细信息

水泥基材料塑性开裂试验的新方法,采用试模外形尺寸为600mm×600mm×70mm,分两层浇筑,基层为C60高强混凝土,其间均匀分布垂直于底部的螺杆,上层可用来做水泥胶砂或水泥净浆试验,将其置于试验室进行恶劣环境条件试验,观察塑性开裂情况。采用不同聚丙烯纤维及不同配合比分析塑性开裂情况,研究结果表明该方法比加拿大的塑性开裂试验方法更先进,对合成纤维在水泥基材料中的作用可以定量化分析。

关键词：塑性开裂聚丙烯纤维双层浇筑试验

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夏季渤海悬浮物粒径与浓度分布特征研究

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海洋湖沼通报 2017年第5期 125-131页

作者：王骁江文胜张学庆周舟边昌伟中国海洋大学海洋环境与生态教育部重点实验室山东青岛266100 中国海洋大学物理海洋教育部重点实验室山东青岛266003 中国海洋大学海洋与大气学院山东青岛266100

为研究夏季渤海悬浮物粒径与浓度分布特征,我们利用现场激光粒度仪LISST于2015年6月、7月和8月在渤海海域进行了264个站位的悬浮物观测。观测结果表明,夏季渤海悬浮物存在左峰型(峰值范围在4-20μm)、右峰型(峰值范围在100-250μm)、双... 详细信息

为研究夏季渤海悬浮物粒径与浓度分布特征,我们利用现场激光粒度仪LISST于2015年6月、7月和8月在渤海海域进行了264个站位的悬浮物观测。观测结果表明,夏季渤海悬浮物存在左峰型(峰值范围在4-20μm)、右峰型(峰值范围在100-250μm)、双峰型和混合型4种主要粒径分布形态。悬浮物平均粒径和体积浓度空间分布都是近岸高,外海低;底层高,表层低。夏季渤海悬浮物浓度在6月、7月和8月存在显著变化,其中渤海表层、10m层和底层悬浮物体积浓度变化程度最大的海区分别为莱州湾、渤海中部海区和渤海湾,变化幅度分别为207%,240%和97%。

关键词：渤海悬浮物体积浓度粒径分布

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添加Ni对Mg-Al储氢合金电化学性能的影响

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沈阳师范大学学报（自然科学版） 2013年第1期31卷 16-20页

作者：曹中秋吴迪李昌蔚边静张轲沈阳师范大学化学与生命科学学院沈阳110034

为探究添加Ni对Mg-Al储氢合金电化学性能的影响机制,笔者采用机械合金化在氩气保护下经高能球磨制备了添加5%Ni的Mg58Al42储氢合金,利用电化学方法研究了球磨时间和添加Ni对其放电容量及腐蚀电化学性能的影响。结果表明:目前研究的储氢... 详细信息

为探究添加Ni对Mg-Al储氢合金电化学性能的影响机制,笔者采用机械合金化在氩气保护下经高能球磨制备了添加5%Ni的Mg58Al42储氢合金,利用电化学方法研究了球磨时间和添加Ni对其放电容量及腐蚀电化学性能的影响。结果表明:目前研究的储氢合金放电容量与球磨时间有关,随球磨时间的延长先变大,球磨10h时放电容量最大为408.5mAh.g-1,此时的放电时间为490min,随后逐渐减少;储氢合金出现二次钝化现象,但二次钝化区间较短,腐蚀速度与球磨时间有关,球磨1h时腐蚀速度最低,此时的腐蚀电流密度为1.28×10-5 A.cm-2;交流阻抗谱由单容抗弧组成,极化电阻随球磨时间的延长先减小再增大而后减小。添加5%Ni后合金放电容量最大,但腐蚀速度有所加快。

关键词： Mg-Al合金添加Ni 放电容量极化曲线交流阻抗谱(EIS)

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