前言 上升流是海水在某一范围内的上升运动,在这一范围内较深层的水被带到表层,一般说这个深度不超过几百米。据估计上升流的速度在10~(-6)——10~(-2)厘米/秒之间,这种量值的流速往往通过运动方程、平流方程或密度、温度等值线的向上移动速度进行估算来获得(如秘鲁沿岸,其等密度线的向上位移表明平均上升流速度,在秋季每月12米,在冬季每月58米)。由于较深层水的上升,使在上升流地区表层的水温比周围表层的水温低,因此,我们可以通过这种异常来识别上升流的位置。 INTRODUCTION The upwelling is a rising movement of seawater within a range in which deeper water is brought to the surface, generally speaking less than a few hundred meters in depth. It is estimated that the ascending velocity is between 10 -6 cm -2 / cm and the flow rate of this magnitude tends to move upward through the equations of motion, advection or density, temperature contours (As in the Peruvian coast, the upward displacement of its iso-density lines indicates an average updraft velocity of 12 meters per month in autumn and 58 meters per month in winter). Due to the rise of deeper water, the surface water temperature in the upwelling area is lower than the water temperature of the surrounding surface, so we can identify the position of updraft by this anomaly.