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Multi-core structure of the main part of the Kuroshio at G-PN section in the East china Sea

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Chinese Science Bulletin 2006年第6期51卷 738-746页

作者： CHEN Hongxia yuan {1. {2. feng institute of {1. Chinese Academy of Sciences Qingdao266071 China First institute of Oceanography State Oceanic Administration Qingdao 266061 China Graduate School of Chinese academy of {1. Beijing 100039China

Sectional velocity distribution of the East china Sea Kuroshio is one of the basic points in the study of the Kuroshio. Hydrographic temperature and salinity data at G-PN section in the East china Sea from June {2.55 to November 2.0{2.are collected and properly processed to calculate the geostrophic cur-rent using dynamic height method at the transect of the Kuroshio. After analysis of calculation results, the basic current structure of the Kuroshio in its main part is examined together with scalar estimate and char-acters of multi- core structure, and spacial-temporal variations of current cores’ position. Main result shows that ({2. single-core structure, double-core structure and multi-core structure are basic forms in axial part of the Kuroshio; (2. abvious temporal varia-tions exist in current structure of the Kuroshio; (3) the current of structure of the Kuroshio has distinctly seasonal association. The number of current cores is on the high side of core numbers in average and multi-core stucture appears in fall mostly.

关键词：黑潮中国东海日本洋流多中心结构速度分布

Statistical model on the surface elevation of waves with breaking

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Science china Earth {1. 2008年第5期51卷 759-768页

作者： yuan {1. {2. feng ZHANG ShuWen HAN Lei Marine Science and Numerical Modeling Laboratory SOAQingdao 266061China First institute of Oceanography SOAQingdao 266061China South china Sea Environmental {1. Guangdong Ocean UniversityZhanjiang 524088China

In the surface wind drift layer with constant momentum flux, two sets of the consistent surface eleva- tion expressions with breaking and occurrence conditions for breaking are deduced from the first in- tegrals of the energy and vortex variations and the kinetic and mathematic breaking criterions, then the expression of the surface elevation with wave breaking is established by using the Heaviside function. On the basis of the form of the sea surface elevation with wave breaking and the understanding of small slope sea waves, a triple composite function of real sea waves is presented including the func- tions for the breaking, weak-nonlinear and basic waves. The expression of the triple composite func- tion and the normal distribution of basic waves are the expected theoretical model for surface elevation statistics.

关键词： first integrals for energy and vortex variations in wind drift layer kinetic and mathematic wave breaking criterions triple composite function of the real sea waves normal distribution of the basic waves

胶州湾大气降水水溶性离子组成特征及来源解析

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中国环境科学 2024年第3期44卷 1225-1233页

作者：冯辰龙邢建伟袁华茂宋金明中国科学院海洋研究所中国科学院海洋生态与环境科学重点实验室山东青岛266071 中国科学院大学北京100049 中国科学院海洋大科学研究中心山东青岛266071 青岛科技大学化学与分子工程学院山东青岛266042

基于2.1.年6月至2.2.年8月胶州湾沿岸的大气降水样品,分析降水主要水溶性离子(Na^(+)、K^(+)、Ca^(2.)、Mg^(2.)、NH^(4+)、F-、Cl^(-)、SO_(4)^(2.)、NO_(3)^(-)、MAS-(甲基磺酸根))的组成特征和湿沉降通量,评估其对近海营养成分输入... 详细信息

基于2.1.年6月至2.2.年8月胶州湾沿岸的大气降水样品,分析降水主要水溶性离子(Na^(+)、K^(+)、Ca^(2.)、Mg^(2.)、NH^(4+)、F-、Cl^(-)、SO_(4)^(2.)、NO_(3)^(-)、MAS-(甲基磺酸根))的组成特征和湿沉降通量,评估其对近海营养成分输入的贡献和潜在生态效应,并利用气团后向轨迹和正定矩阵因子分解法(PMF)解析其主要来源.结果表明,观测期间,胶州湾大气降水雨量加权平均(Volume-weighted Mean,VWM)pH为6.41.电导率的VWM值为1..3μS/cm,降水中水溶性离子以Na^(+)、NH^(4+)、NO_(3)^(-)、Cl^(-)和SO_(4)^(2.)为主,在季节上呈现出冬春季浓度明显高于夏秋季的特征,而湿沉降通量则因受降水量的控制而主要集中在夏季(约占55%).胶州湾区域大气降水共清除72.4.6t水溶性离子,营养盐(主要为NH^(4+)和NO_(3)^(-),以氮计)沉降入海量达951.9t/a,表明降水在清洁大气的同时也加剧了海洋环境的污染和海洋生态系统的失衡.气团后向轨迹分析得到了观测期间控制胶州湾降水的4类主要气团,在不同季节,降水过程受到不同气团的影响,其中以来自华东地区和东北方向的气团的影响较大.基于PMF的源解析结果显示,胶州湾大气降水水溶性离子受到农业源、海洋源、扬尘源、生物质和垃圾燃烧源、工业和交通源5种来源的共同控制,其中以农业源排放的贡献最为突出(2..7%),而其他4种源的贡献大致相当.研究证实胶州湾大气环境受到复杂人为源排放、矿物沙尘以及海洋源排放的综合制约,而人为排放的贡献占主导地位.

关键词：水溶性离子湿沉降通量大气降水气团后向轨迹正定矩阵因子模型胶州湾

Stabilization technology and corrosion mechanism of rust layer on Q370 weathering steel surface

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Journal of Iron and Steel Research International 2022年第10期29卷 1694-1709页

作者： Shao-zheng Ma Li-juan Sun Hu-yuan Sun Hong-bin Sun Jin-{1. Jiang Yi-xin Yin Shu-{1. Qu Zhen-hua Liu Shao-xia Xu Key Laboratory of Marine Environmental Corrosion and Bio-Fouling Institute of OceanologyChinese Academy of SciencesQingdao266071ShandongChina University of Chinese academy of {1. Beijing100049China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237ShandongChina Shandong Weilai High Speed Railway Co. Ltd.Jinan250102ShandongChina School of Civil Engineering Shandong UniversityJinan250061ShandongChina china Railway No.1. Engineering Group Co. Ltd.Qingdao266034ShandongChina

A newly developed rust layer on Q370qENH weathering steel(sample C)was studied under dry–wet cycle test of 3.5 wt.%NaCl solution and salt spray test,compared with the bare weathering steel(sample A)and the weathering steel with additive contents(CuSO_(4)0.2.FeSO_(4)0.1.NaHSO_(3)0.02.NaCl 0.02.Na_(2.HPO_(4)0.01.and water balance,in mass%,termed as sample B).Corrosion mechanism of Q370qENH weathering steel after different surface treatments was investigated by means of surface potential scanning,mass change,polarization curve,and X-ray *** results of X-ray diffraction indicate that rust of bare weathering steel has rare Fe_(3)O_(4),and a dense oxide layer mainly composed of Fe_(3)O_(4) is formed on rust of both sample B and sample *** surface potential of sample A gradually increases to−0.2.V in the dry–wet cycle test,while the surface potential of sample A maintains at about−0.6 V in the salt spray *** surface potential of sample B and sample C is higher than that of sample A in the early stage and remains stable during the short-term accelerated corrosion ***,the mass change of sample C gradually stabilizes with time in the dry–wet cycle and salt spray *** corrosion current of the sample A is lower than that of sample C in the initial stage of short-term accelerated corrosion ***,the corrosion current of sample C is smaller than that of the sample A in the *** main components of the deep rust of sample A areγ-FeOOH andα-FeOOH,while those of the deep rust of sample B and sample C are Fe_(3)O_(4).

关键词： Weathering steel Rust layer stabilization Surface treatment Corrosion Surface potential scanning Rust layer analysis

近2.年中国近海和海岸带大气黑碳干湿沉降及源解析

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海洋科学 2023年第2期47卷 71-85页

作者：冯辰龙邢建伟袁华茂宋金明李学刚马骏中国科学院海洋生态与环境科学重点实验室中国科学院海洋研究所山东青岛266071 青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室山东青岛266237 中国科学院大学北京100049 中国科学院海洋大科学研究中心山东青岛266071 青岛科技大学化学与分子工程学院山东青岛266061

作为一种在大气中普遍存在的碳质气溶胶成分,黑碳因可对生态环境产生深远影响而备受关注。对海洋大气黑碳沉降的深入认识有助于进一步明确海洋碳循环过程。目前对中国近海和海岸带大气黑碳沉降的研究工作少且零散,相关研究数据不足以探... 详细信息

作为一种在大气中普遍存在的碳质气溶胶成分,黑碳因可对生态环境产生深远影响而备受关注。对海洋大气黑碳沉降的深入认识有助于进一步明确海洋碳循环过程。目前对中国近海和海岸带大气黑碳沉降的研究工作少且零散,相关研究数据不足以探求其规律。对该区域近2.年来已报道的大气黑碳数据进行系统梳理和再分析,利用整合的数据集成估算沉降通量并分析其空间分布特征,最后评述了目前黑碳的源解析方法并评估了该区域大气黑碳的来源,对未来近海大气黑碳研究作了展望。结果表明:①中国近海和海岸带陆域大气黑碳浓度平均值分别约为1.95±1.2.和5.05±2.62.g·m^(-3),具有显著的人为污染特征,由北向南,海岸带陆域黑碳浓度近似呈“V”形分布,最低值位于南黄海沿岸,而近海区则大致呈递减趋势;②中国近海和沿海陆域大气黑碳的总沉降通量分别为41..2.1.7.1.1.2..7±72.0}1.mg·m^(-2.·a^(-1.,以湿沉降为主,南北差异明显,主要受控于降水过程和陆源排放强度;我国近海黑碳大气沉降量可占全球海洋黑碳总沉降量的1.%;③化石燃料源贡献了中国海岸带大气黑碳总排放量的62.~84%,因此,应注重从减少化石燃料源使用的角度控制大气黑碳污染。今后,应注重不同源解析方法间的集成和互校,并加强黑碳在地球不同储库间的迁移、转化和埋藏机制研究。近海和海岸带大气环境中的黑碳有着多方面的影响,其沉降入海并以惰性形式埋藏对增强海洋碳汇有着重大意义。

关键词：大气黑碳浓度中国近海和海岸带空间分布沉降通量源解析