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在粤东沿岸的夏季存在风生上升流,中心位置在20m以浅,该上升流的年际变化较大,1982年8月碣石湾外上升流流速为1.2×10~(-3)cm/s,活性磷酸盐的垂直通量为1.5 mmol/(m~2.d),初级生产力为1558mg/(m~2.d)。在上升流靠岸内侧,5m以浅范围的底层存在着贫氧现象,在上升流的中心区外,有海水垂向逆温现象,上升流区海水的理化特征:温度为22.13℃,盐度为34.19,溶解氧为3.72cm~3/dm~3氧饱和度为74.6％,pH值为8.14,活性磷酸盐为1.10 mmol/m~3。
In the east of Guangdong coast, windward upwelling exists in the summer, and the center is located at a shallow depth of 20m. The annual variation of the upwelling is larger. In August 1982, the flow velocity outside the Shendashi Bay was 1.2 × 10 -3 cm / s , The vertical flux of active phosphate is 1.5 mmol / (m ~ 2.d), and the primary productivity is 1558 mg / (m ~ 2.d). On the inner side of the ascending stream, there was an oxygen-depleting phenomenon in the shallow layer of 5 m. Vertical inversion of seawater was found outside the central area of updip flow. The physical and chemical characteristics of seawater in the upwelling area were as follows: temperature was 22.13 ℃, salinity 34.19, dissolved oxygen was 3.72cm ~ 3 / dm ~ 3, the oxygen saturation was 74.6%, pH value was 8.14 and active phosphate was 1.10 mmol / m ~ 3.