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A novel high resolution model without open boundary conditions applied to the China Seas: first investigation on tides

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Acta Oceanologica Sinica 2010年第6期29卷 12-25页

作者： YU Huaming CHEN Xueen BAO Xianwen thomas pohlmann WU Dexing Institute of Physical Oceanography Ocean University of China Qingdao 266100 China Institute of Oceanography Centre for Marine and Climate Research University of Hamburg Hamburg 20146 Germany

We developed a Global Ocean Circulation and Tide Model （GOCTM） with coarse grids in the open deep ocean degrading ‘smoothly’ into the highly resolved China Seas （CS） of refined grids to study the tides and circulation *** is based on the framework of the Finite Volume approach for better mass conservation through improved transports across the discrete individual control *** also takes a full advantage of the geometric flexibility of unstructured mesh using a realistic global topography including the Arctic *** CS are given a special focus by refining the unstructured grids,but they are embedded into global domain ***,GOCTM not only successfully avoids the treatment of the open boundaries,but also optimizes the trade-off between computational cost and model ***,GOCTM is driven by the astronomical tide-generating potential and the secondary tide-generating potential directly,together with the wind stress and heat *** succeeds in reproducing the global eight principal tidal harmonic ***,the simulated tidal results in the CS are improved compared to some other regional models with the discrepancy of 3.9 cm for M 2 *** idea of GOCTM can also be referred for other regional ocean study.

关键词： finite volume model GOCTM open boundary conditions the China Seas

Organophosphate Esters in Air and Seawater of the South China Sea:Spatial Distribution,Transport,and Air−Sea Exchange

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Environment & Health 2023年第3期1卷 191-202页

作者： Lijie Mi Zhiyong Xie Lulu Zhang Joanna J.Waniek thomas pohlmann Wenying Mi Weihai Xu Institute of Coastal Environmental Chemistry Helmholtz-Zentrum HereonGeesthacht 21502Germany Institute of Oceanography University of HamburgHamburg 20146Germany Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Sanya Institute of Ocean Eco-Environmental Engineering Sanya 572000China University of Chinese Academy of Sciences Beijing 100049China Department of Marine Chemistry Leibniz Institute for Baltic Sea Research WarnemündeRostock 18119Germany MINJIE Institute of Environmental Science and Health Research Geesthacht 21502Germany

Organophosphate esters(OPEs)have become one group of chemicals with emerging concern in the marine *** this work,we investigated OPEs in the air and seawater of the South China Sea in summer *** concentrations of∑_(10)OPEs in the atmosphere ranged from 66 to 550 pg/m^(3),with TCIPP,TNBP,TPhP,and TEP predominating in the *** total dissolved OPE concentrations(∑_(10)OPEs without TEP)measured in high-volume water samples ranged from 300 to 3600 pg/L,with a mean concentration of 1180±910 pg/*** was measured with liquid−liquid extraction(LLE),and it showed the highest concentration(average 2000±1450 pg/L)among the selected *** suspended matter associated OPEs accounted for less than 4.7%of the sum of OPE concentrations in *** fractions and air−sea exchange fluxes showed that TCEP,TCIPP,TIBP,TEHP,TPhP,and EHDPP were favored to volatilize,TEP dominated the deposition,while TPrP and TNBP varied between volatilization and *** particle deposition fluxes ranged from 5 to 71 ng/m^(2)/day with an average of 17±15 ng/m^(2)/*** input of∑OPEs to the entire South China Sea via atmospheric particle deposition was estimated to be 22±19 tons/year,while the net air−sea exchange fluxes of OPEs were volatilization from seawater to air with an average of 44±33 tons/*** work suggests that air−sea exchange and atmospheric particle deposition are significant processes interfering with the transport of OPEs in the marine environment.

关键词： Organophosphate esters South China Sea Air−sea exchange Atmospheric deposition Long-range transport

原始热通量资料的海陆分布对近海SST模拟的影响

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中国海洋大学学报（自然科学版） 2010年第7期40卷 24-28页

作者：宋丹 thomas pohlmann 陈学恩中国海洋大学物理海洋实验室山东青岛266100 德国汉堡大学海洋研究所德国汉堡d20146

对于海洋数值模式用以计算海表温度(SST)的热通量资料,本文在插值的过程中引入了1个权重因子f,以探讨由于原始资料和数值模式的分辨率以及相应的海陆分布的不同所导致的近海SST模拟误差。对于原始资料中坐标位于海洋的点,f_O=1.0;而对... 详细信息

对于海洋数值模式用以计算海表温度(SST)的热通量资料,本文在插值的过程中引入了1个权重因子f,以探讨由于原始资料和数值模式的分辨率以及相应的海陆分布的不同所导致的近海SST模拟误差。对于原始资料中坐标位于海洋的点,f_O=1.0;而对于坐标位于陆地的点,f_L～[0,1]。数值实验对比了渤海和北黄海的原始数据插值结果和SST模拟结果。通过对比数值模式和原始资料的海陆分布,发现在模拟海区有相当多的模式水点被原始资料的陆点半围绕,在这些点上的插值结果受f_L的取值影响较大。本文的对比数值实验表明,当f_L分别取0.5和1.0时,对SST的模拟差异在部分海域达到了O(0.1℃)的量级,与数值模式本身的误差量级相当,是海洋数值研究中应当给予重视的误差因素。

关键词：热通量资料海陆分布权重因子海表温度

The influence of the Three-Gorges Dam on hydrographic and hydrodynamic conditions of the East China Sea

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Acta Oceanologica Sinica 2011年第5期30卷 45-55页

作者： FAN Xiaopeng ZHOU Feng CHEN Xueen HUANG Daji pohlmann thomas State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China Institute of Physical Oceanography Ocean University of China Qingdao 266002 China Institute of Oceanography University of Hamburg Hamburg 20146 Germany Department of Ocean Science and Engineering Zhejiang University Hangzhou 310058 China

A fine resolution model has been applied to get more insight into the effects of a modified runoff due to the Three-Gorges-Dam （TGD） on the East China Sea （ECS）.The region of interest was confined to the offshore area in the vicinity of the Changjiang *** the east,it extended up to the area southwest of Cheju *** model was used to evaluate the effect of a modified runoff on the water properties of the adjacent regions like the Changjiang diluted water （CDW） and the Zhoushan Fishing *** sensitivity of the ECS to a modified Changjiang runoff was explored firstly by sensitivity studies and secondly by experiments based on historical runoff records and water management plans of the *** experiments led to the general conclusion that the most affected area by runoff is located close to the Changjiang River *** area of influence has an extension of about 150 km×150 *** the realistic experiment,the related anomalies reached their maximum value in early summer （May）.In normal years the related salinity anomalies can get to as large as 2.

关键词： Three-Gorges-Dam surface salinity anomalies stratification East China Sea

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渤海环流与输运季节变化的数值模拟(英文)

黄渤海海洋 2001年第2期19卷 1-9页

作者：魏皓武建平 pohlmann thomas 青岛海洋大学物理海洋研究所山东青岛266003 国家海洋局第一海洋研究所山东青岛266061 Institute of Oceanology

渤海的风和温度层结有明显的季节变化 ,因而其环流与输运亦有明显的季节信号。以季节平均的海面气象条件和开边界的潮波系统驱动三维斜压水动力模型———HAMSOM ,模拟了渤海冬、夏季的总环流。渤海环流冬强夏弱 ,表层风漂流常被下层逆... 详细信息

渤海的风和温度层结有明显的季节变化 ,因而其环流与输运亦有明显的季节信号。以季节平均的海面气象条件和开边界的潮波系统驱动三维斜压水动力模型———HAMSOM ,模拟了渤海冬、夏季的总环流。渤海环流冬强夏弱 ,表层风漂流常被下层逆风流所补偿。深度平均环流 ,即水柱内的输运 ,流型有显著的季节变化 :冬季在渤海中部沿逆时针方向旋转 ,辽东湾顶有一个顺时针流涡 ,阻碍了湾顶水与外海水的交换 ;夏季则为一个大的贴岸的顺时针流环 ,内嵌许多局地涡旋。这些与渤黄东海海洋水文图集中给出的多年观测的环流基本相同 ,同时也被水文要素分布及耐盐浮游动物的出现所佐证。风的季节变化决定了渤海大部分海区、特别是海峡附近环流的季节变化 ,但辽东湾东岸众多的岬角涡旋却不随季节变化 ,因为它们是由潮波系统与岬角岸型变化的非线性相互作用产生的。

关键词：环流输运季节变化渤海数值模拟风温度层结