我国东海海域赤潮发生年际变化趋势及其影响因素分析

An Analysis on the Year-to-Year Variation Trend and Influencing Factors of Red Tide Occurring in East China Sea Waters

为了研究我国东海海域近年来赤潮发生年际变化趋势及其影响因素，对渤海，黄海、东海和南海四大海域2000～2006年赤潮年发生次数及年累计发生面积进行分析比较，着重分析了影响东海赤潮发生的主要因素、长江口营养盐含量的变化趋势、长江口营养盐含量与东海赤潮现象的关联。结果表明，东海赤潮发生频率最高，且年累计发生面积位于我国海域之首；指出营养盐含量的年变化量对东海赤潮发生现象具有重要影响。

In order to study the year-to-year variation trend of red tide occurrence and its influencing factors in East China Sea waters in recent years, comparisons of the times and accumulative areas of yearly red tide occurring incidents were made among Bohai Sea, Yellow Sea, East China Sea and South China Sea waters for the years 2000-2006. It could be seen that both the red tide occurrence and related accumulative areas in East China Sea waters were the most. The analysis has shown that the yearly variation of nutrient salt contents exerted an important effect on the occurrence of red tide.