A theoretic solution of one-dimensional heat transfer equation and a numerical simula-tion of 3D baroclinic circulation by MOM2 are investigated to understand the roles of bottom boundary mixing and the Topographic He...A theoretic solution of one-dimensional heat transfer equation and a numerical simula-tion of 3D baroclinic circulation by MOM2 are investigated to understand the roles of bottom boundary mixing and the Topographic Heat Accumulation Effect (THAE) in the Yellow Sea Cold Water Mass (YSCWM) circulation. Our results show: (i) The time scale of heat transfer changes from days to weeks and from shallow to deep water column. Strong bottom boundary mixing makes the thermocline domed. (ii) The circulation of YSCWM has a two-layer structure. The upper layer is cyclonic, while the lower layer is anticyclonic, and the lower layer is thinner (about 10—20 m) and weaker than the upper layer. The depth-integrated (net) circulation is cyclonic. (iii) The strength of the bottom boundary mixing influences the temperature structures greatly but has less effect on the velocity structure.展开更多
Satellite remote sensing observations show that during winter, sea surface temperature （SST） presents the structure of double warm tongues in the Huanghai Sea trough： the western and the eastern warm tongues. Numer...Satellite remote sensing observations show that during winter, sea surface temperature （SST） presents the structure of double warm tongues in the Huanghai Sea trough： the western and the eastern warm tongues. Numerical experiments based on POM are carried out to study the forming mechanism of this thermal structure and its relation to the Huanghai Sea Warm Current （HSWC）. The control experiment reproduces this phenomenon quite well, and comparing experiments investigate the effect of wind and tide. It is found that the western warm tongue is mainly caused by the HSWC, which can be strengthened by wintertime southward wind. The eastern warm tongue develops under the influence of an anti-clockwise circulation which is induced by the temperature front of the Huanghai Sea Cold Water Mass （HSCWM） in summer and autumn. In the eastern portion of this circulation, the northward current carries warm water to the north, forming the eastern warm tongue, which remains till winter.展开更多
基金the National Natural Science Foundation of China (Grant Nos. 49736200 and 49976001) the Key Basic Research and Development Plan (Grant Nos. 1999043802 and 1999043702)+1 种基金 and the Youth Marine Science Foundation of State Oceanic Administration China (Gr
文摘A theoretic solution of one-dimensional heat transfer equation and a numerical simula-tion of 3D baroclinic circulation by MOM2 are investigated to understand the roles of bottom boundary mixing and the Topographic Heat Accumulation Effect (THAE) in the Yellow Sea Cold Water Mass (YSCWM) circulation. Our results show: (i) The time scale of heat transfer changes from days to weeks and from shallow to deep water column. Strong bottom boundary mixing makes the thermocline domed. (ii) The circulation of YSCWM has a two-layer structure. The upper layer is cyclonic, while the lower layer is anticyclonic, and the lower layer is thinner (about 10—20 m) and weaker than the upper layer. The depth-integrated (net) circulation is cyclonic. (iii) The strength of the bottom boundary mixing influences the temperature structures greatly but has less effect on the velocity structure.
基金The National Key Basic Research Program of China under contract 2006CB403605the National Natural Science Foundation of China under contract Nos.40806016 and 40706016China 908–project under contract No. 908–02–01–03
文摘Satellite remote sensing observations show that during winter, sea surface temperature （SST） presents the structure of double warm tongues in the Huanghai Sea trough： the western and the eastern warm tongues. Numerical experiments based on POM are carried out to study the forming mechanism of this thermal structure and its relation to the Huanghai Sea Warm Current （HSWC）. The control experiment reproduces this phenomenon quite well, and comparing experiments investigate the effect of wind and tide. It is found that the western warm tongue is mainly caused by the HSWC, which can be strengthened by wintertime southward wind. The eastern warm tongue develops under the influence of an anti-clockwise circulation which is induced by the temperature front of the Huanghai Sea Cold Water Mass （HSCWM） in summer and autumn. In the eastern portion of this circulation, the northward current carries warm water to the north, forming the eastern warm tongue, which remains till winter.
