粤东陆架区夏季的上升流

本文根据水温、盐度和溶解氧含量等要素的历史资料分析了南海北部粤东陆架区夏季的上升流现象。结果表明,上升运动的深层高盐、低温冷水使该海区夏季中、下层及近岸水温下降,盐度上升,溶解氧含量相对减少。上升流中心位于广东汕头外海,中心附近上升流明显强化,本海域上升流存在空间上的不一致性和明显的年度间变化。

A study of upwelling over continental shelf off eastern Guangdong

Analysis of historical data of water temperature, salinity and disolved oxigen content indecate that summer upwelling is a common phenomenon over entile continental shelf off eastern Guangdong. Upwelled cold, haline deep water causes summer decrease in water temperature and disolved oxigen content and increase in salinity which occur in coastal water as well as mid and lower layers over the shelf. This phenomenon is clearly shown in spacial and temporal distribution of these properties. An upweUing center is identifide off Shantou where upwelling is intensified. It is also suggested that interannual variation of upwelling off eastern Guangdong is quite significant.