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Spatial and temporal variability of heat content above the thermocline in the tropical Pacific ocean

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Acta oceanologica Sinica 2003年第2期22卷 179-190页

作者： Pu Shuzhen, Yu Fei, Hu Xiaomin, Chen Xingrong first institute of oceanography, state oceanic administration, qingdao 266061.china, state ocean Adm Inst Oceanog 1 Qingdao 266061 Peoples R China

Heat content of the upper layer above the 20℃ isotherm in the tropical Pacific ocean isestimated by using the sea temperature data set with a resolution 2°latitude×5°longitude (1980-1993) for the water depths (every 10 m) from 0 m to 400 m, and its temporal and spatial variabilities are analyzed. (1) The temporal variability indicates that the total heat in the upper layer of the equatorial Pacific ocean is characterized by the interannual variability. The time series of the equatorial heat anomaly 5 months lead that of the El Nino index at the best positive lag correlation between the two, and the former 13 months lag behind the latter at their best negative lag correlation. Therefore the equatorial heat content can be used as a better predictor than the El Nino index for a warm or cold event. In addition, it is also found that less heat anomaly in the equator corresponds to the stronger warm events in the period (1980- 1993) and much more heat was accumulated in the 4 years including 1992/1993 ENSO (1989-1993) than the 4 years including 1982/1983 ENSO (1980-1983); (2) The spatial variability indicates that the area with the highest lag correlation among the grids moves in an anti-clockwise circle in the northern tropical Pacific ocean within 4 years period and in a clockwise circle in the southern tropical Pacific ocean. This result provides scientific evidence for the quasi - cycle theory of El Nino events.

关键词： Heat content ENSO tropical Pacific ocean

Warming in Arctic intermediate and deep waters around Chukchi Plateau and its adjacent regions in 1999

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Science china Earth Sciences 2005年第8期48卷 1312-1320页

作者： ZHAO Jinping1, GAO Guoping2 & JIAO Yutian1 1. first institute of oceanography, state oceanic administration, qingdao 266061. china 2. ocean University of china, qingdao 266003, china 1. first institute of oceanography State Oceanic Administration 266061 Qingdao China 2. ocean University of china 266003 Qingdao China

Based on the data measured during Arctic scientific expedition of china in 1999, the characteristics of temperature and salinity distributions around the Chukchi Plateau and its ad-jacent regions have been studied. It was found that the intermediate water with temperature higher than 0.5℃ existed in all parts of a 640 km section with a maximum temperature of 0.85℃ indicating a strong signal of the warming in Arctic Intermediate Water in 1999. Two important phenomena are described in this paper. first, the temperature of warm water was horizontally nonuniform. In the area of Chukchi Plateau, the temperature was higher, the layer of warm water was thicker and the depth of the warm water core was shallower than those in the area of con-tinental slope. The horizontal nonuniformity of the temperature distribution of warming water im-plies that the upward heat flux should also be nonuniform, thus exerting different effects on sea ice thickness, ice extent, and air-sea heat exchange. The mechanism to generate higher tem-perature in the plateau region was the bypassing of current around the plateau area caused by the special local topography, which restricted water exchange across the plateau and conserved heat in the water body. Second, the deep water down to 1400 m was also warming with a tem-perature increase of 0.2℃. The warming in deep water reflects the occurrence of complicated heat redistribution processes in the intermediate water, which altered the thermal structure in the upper 1400 m. The warming data embody the obvious impact of global climate change on the Arctic ocean and further studies are wanted.

关键词： Chukchi Plateau, Arctic ocean, warming in intermediate water, warming in deep water.

Study on interaction between the coastal water, shelf water and Kuroshio water in the Huanghai Sea and East china Sea

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Acta oceanologica Sinica 2003年第3期22卷 351-367页

作者： Binghuo Guo, Xiaomin Hu, Xuejun Xiong, Renfeng Ge first institute of oceanography, state oceanic administration, qingdao 266061. china state ocean Adm Inst Oceanog 1 Qingdao 266061 Peoples R China

The main processes of interaction between the coastal water, shelf water and Kuroshio water in the Huanghai Sea (HS) and East china Sea (ECS) are analyzed based on the observation and study results in recent years. These processes include the intrusion of the Kuroshio water into the shelf area of the ECS, the entrainment of the shelf water into the Kuroshio, the seasonal process in the southern shelf area of the ECS controlled alternatively by the Taiwan Strait water and the Kuroshio water intruding into the shelf area, the interaction between the Kuroshio branch water, shelf mixed water and modified coastal water in the northeastern ECS, the water-exchange between the HS and ECS and the spread of the Changjiang diluted water.

关键词： Huanghai Sea East china Sea coastal water shelf water Kuroshio water interaction

Numerical experiments of HAB inducement in qingdao adjacent coastal area

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Acta oceanologica Sinica 2010年第5期29卷 109-120页

作者： LIU Xuehai LI Ruixiang YUAN Yeli College of Physical and Environmental oceanography Ocean University of China Qingdao 266100 China first institute of oceanography State Oceanic Administration Qingdao 266061 China Key Laboratory of Marine Science and Numerical Modeling State Oceanic Administration First Institute of Oceanography State Oceanic Administration Qingdao 266061 China

A three-dimension ecological dynamic model was established to numerically study the relationship of HAB and environmental *** numerical experiments showed that the growth of diatom,the dominant HAB specie,was mainly restricted by phosphate and *** the concentrations of phosphate and silicate reach 17-25 μg/L and 300-375 μg/L respectively,the water is in a state of *** phosphate and silicate up to 26-32 μg/L and 350-500 μg/L respectively,HAB could be *** major regions of HAB occurrence are Jiaozhou Bay mouth,coastal bays,and coastal area from Maidao to *** avoid HAB occurrence,concentration of phosphate and silicate should not exceed 17-20 μg/L and 300 μg/L as a *** control of pollutant discharge is a key point to prevent water eutrophication and HAB occurrence.

关键词： HAB numerical model marine ecosystem dynamics environmental condition

THE VERTICAL THERMAL STRUCTURE OF THE INDIAN ocean DIPOLE MODE FROM WOCE DATA

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Journal of Hydrodynamics 2001年第3期13卷 24-27页

作者： Yu Wei-dong Key Laboratory of Marine Science and Numerical Modeling, state oceanic administration, first institute of oceanography, qingdao 266061. china Key Laboratory of Marine Science and Numerical Modeling State Oceanic Administration First Institute of Oceanography

The Dipole Mode in tropical Indian ocean (DMI) is a newly verified independent internal mode of atmosphere ocean system in Indian ocean. Its surface manifestation is illustrated in detail with the aid of the historical data sets. But relatively few is known about its vertical characteristics. Here the vertical thermal structure of DMI is analyzed using the newly released WOCE GLOBAL DATA (V2.0). Attention is focused on the comparison of the abnormal upper ocean thermal structure along one section with the normal state in year 1990 respectively in two cases: in year 1994 when there was IDM but no E1 Nino and in year 1997 when there were DMI and also E1 Nino. This may shed light on the further theoretical and numerical study of IDM.

关键词： DMI thermal structure

AN EXTENDED MODELING OF TIDE-WAVE MOTION

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Journal of Hydrodynamics 2001年第3期13卷 100-106页

作者： Zhang Qing hua, Xu Hao, Qu Yuan yuan first institute of oceanography, state oceanic administration, qingdao 266061. china Key Laboratory of Marine Science and Numerical Modeling, state oceanic administration, qingdao 266061. china first Inst. of oceanography State Oceanic Administration Qingdao 266061 China

By vertical boundary conditions, a spectral expansion of horizontal tide wave velocity is done in vertical direction in terms of a complete basis functions selected properly, hence a relation between tide levels and spectral components is found theoretically under condition of ignoring the horizontal friction stress and nonlinear effect. And a relation between bottom friction of tide current, which satisfies the viscous condition on sea bottom, and tide levels is determined. The relation is different from the relation of the traditional parameterizing of bottom friction. Moreover integration of the continuity equation and momentum equations is carried out in the vertical direction using zero flux condition on solid boundaries and inputting condition on open boundaries, and then a boundary value problem of elliptic form on the tide levels is constructed.

关键词： tide waves basis function spectral expansion bottom friction

THE RE-DERIVATION OF THE VORTICITY EQUATION OF THE LAYERED FLOW OF THE SHALLOW SEA

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Journal of Hydrodynamics 2001年第3期13卷 10-16页

作者： Zhang Qing-hua, Li Jian ke, Qu Yuan yuan first institute of oceanography, state oceanic administration, qingdao 266061. china Key Laboratory of Marine Science and Numerical Modeling, state oceanic administration, qingdao 266061. china first Inst. of oceanography State Oceanic Administration Qingdao 266061 China

The scale analysis of the layered flow problem of the shallow sea shows that the parameter of E V represented the relative thickness of the friction layer is the little value larger than Rossby number. This illustrates that they are not ignorable and the important control factors of the layered flow although friction effect is only limited within interface Ekman layer and bottom Ekman layer. Using larger little parameter E V as the little perturbation parameter is more reasonable than using the classical Rossby number ε. By using the perturbation expansion and doing the researches of the structure of the Ekman layer on the sea surface, sea bottom and interface, a group of new layered flow vorticity equation is derived. It combines the vorticity of the flow of every layer, the inclination of the interface, the inclination of the sea bottom and the wind stress vorticity on the sea surface. Different from the conventional vorticity equation, which derived by using Rossby number as little parameter and is applied to large scale motion, it allows relatively large interfaces fluctuation, even it is applied to the problem that interface touch the bottom or touch the sea surface.

关键词： interface Ekman layer interface fluctuation touch the bottom touch the sea surface

The influence of the surface heat fluxes of the Kuroshio key-area on meiyu rainfall in the Changjiang River region

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Acta oceanologica Sinica 1991年第1期10卷 73-82页

作者： Ding Liangmo first institute of oceanography,state oceanic administration,qingdao,china first institute of oceanography State Oceanic Administration Qingdao China China

On the basis, of the surface heat fluxes of the Kuroshio key-area (26°-30°N, 125°-30°E)in March andApril, the climatologicai influence of the Kuroshio heat fluxes on meiyu rainfall in the Changjiang River (Yangtse River) region are studied. The results are concluded as follows;the surface heat fluxes of the Kuroshio key-area have certain influence on meiyu rainfall in the Changjiang River region during June and July. The correctness rates for the five stations in the Changjing River region (i. e. Wuhan, Jiujiang, Anqing,Nanjing and Shanghai)are in the range of 9/20-13/20. The surface heat fluxes influence mainly on the homogeneous rainfall pattern,the correctness rates come to 7/10-8/10 for the lower valley of the Changjiang River. The estimation expression of the meiyu rainfall for Shanghai consisting of the surface heat flux and the sea surface temperature anomaly of the Kuroshio key area agrees well with the actual meiyu rainfall condition.

关键词： heat The influence of the surface heat fluxes of the Kuroshio key-area on meiyu rainfall in the Changjiang River region area

Chemical characteristics of clay minerals in the sediments from the Yellow River and the Changjiang River

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Chinese Science Bulletin 1997年第6期42卷 488-492页

作者： HE Liangbiao and LIU Qingyu1.first institute of oceanography, state oceanic administration, qingdao 266003, china 2. institute of Physical oceanography ocean University of qingdao, Qingdac 266003, china first institute of oceanography State Oceanic Administration Qingdao China institute of Physical oceanography Ocean University of Qingdao Qingdao China

THE characteristics of clay minerals are controlled by the characters of weathered mother rock and the weathering environments in source area. The characteristics of clay minerals of the Yellow River should be different from those of the Changjiang River because the characters of mother rock and the weathering environments in the drainage area of the Yellow River are quite different from those in the drainage area of the Changjiang River, so it is important to find a difference between the characteristics of clay minerals of the Yellow River and

关键词： the Yellow River the Changjiang River clay minerals chemical characteristics.