摘要
水团分析是海洋学最早研究的课题之一。就研究方法而论,以浓度混合理论法历来最为引人注意。该法是由Helland-Hansen首次创立的,以后相继得到许多学者的逐步完善和应用。这种方法建立在T-S图解的基础上,并能得到定量的结果,在大洋水团分析中应用的效果亦良好。但运用于浅海,则有较大的局限性。
The idea of modified water-masses is introduced and a cluster analysis is used for determining the boundary of modified water-masses and its variety in the shallow water area of the Huanghai Sea(Yellow Sea)and the East China Sea.According to the specified standards to make the cluster,we have determined the quantity and boundary of the water-masses and the mixed zones.The results obtained by the cluster method show that there are eight modified water-masses in this area.According to the relative index of temperature and salinity,the modified water-masses are divided into nine different characteristic parts.The water-masses may also be divided into three salinity types.On the TS-Diagram,the points concerning temperature and salinity of different modified water-masses are distributed around a curve,from which the characteristic of gradual modification may be embodied.The variation ranges of different modified water-masses are all large,explaining the intensive modification of water-masses in this area.The increase of temperature and the decrease of salinity in warm season and the reversal of them in cold season are regardedas the characteristics of modification of the sea water in all the Huanghai Sea and the East China Sea.All the seasonal water-masses undergo a process of formation and climination.The correlations of the modified water-masses with the marine environment are discussed in this paper.The modification of water-masses is created by the combinative actions of thermodynamic and dynamic factors.Through the analysis of modified water-masses,we believe that the thermodynamic factors play a major part in the modification of water-masses in this area.The correlations between the tonguelike distribution of the boundary of modified water-masses and the current direction are very apparent,which can be used as a collateral evidence for analyzing circulation.Finally,the relationships between the modified water-masses and the central fishing grounds at bottom layer are illustrated.
作者
苏育嵩
喻祖祥
李凤岐
Su Yusong;Yu Zuxiang;Li Fengqi(Shandong College of Oceanology)
出处
《海洋与湖沼》
1983年第1期1-13,共13页
Oceanologia Et Limnologia Sinica
