有利于赤潮消亡的水文气象条件

The hydrological-meteorological conditions conducive to the attenuation of red tide

本文收集整理了1980～2004年期间南海历次赤潮事件,以及这些赤潮事件结束前后对应的水文气象观测要素;结合学术界关于赤潮消退前后水文气象变化的研究成果,统计分析了南海赤潮消亡前后在气温、海温、气压、降雨、风向风速等方面的变化特征。研究显示:与有利于赤潮发生发展的水文气象变化相反的趋势是有利于赤潮消亡的环境条件;大部分赤潮事件在赤潮消亡前后有一种或多种水文气象要素出现明显的变化;赤潮持续时段天气系统的改变是赤潮消亡的有利环境条件,但不是唯一的影响因素;水温、气温过高或气压过低,同样可以抑制赤潮的维持或发展。

This article collects all the previous red tide incidents in South China Sea since 1980 004, and collects, registers, and sorts out all those hydrological-meteorological observation values in the periods of red tide vanishment. After study of academy＇s successes about the hydrological-meteorological changes on red tide vanishment, statistical analysis of the changes of air temperature, sea temperature, air pressure, rainfall, wind speed and wind direction in the period of red tide vanishment have been done. And the conclutions are as follows： if some kind of hydro-meteorological change trend is helpful to the occurrence and development of red tide, the opposite trend is conducive to the red tide vanishment; For most red tide events, one or more hydro-meteorological factors change significantly when red tide is dying; The change of the weather system existed in red tide sustained period is the favorable environmental condition for the disappearance of red tide, but not the only factor; When air and water temperatui＇es are too high or air pressure is too low, the development of red tide may be inhibit.