中文摘要：

根据2008年7月22-26日和8月5-14日2个航次对黄海浒苔绿潮爆发区的调查数据,研究了调查海域营养盐的浓度变化和分布特征。结果表明,第2航次NH4-N的平均浓度为0.34μmol/L,低于第1航次,第2航次NO3-N、PO4-P和SiO3-Si的平均浓度分别为4.63μmol/L、0.39μmol/L和6.76μmol/L,高于第1航次,其中平均浓度变化最大的是PO4-P,其次是NH4-N。受陆地径流和苏北沿岸流的影响,调查海区的西南部是营养盐高值区,为绿潮爆发提供了一定基础。表层海水中NO3-N最高值出现在调查海区的西南部,底层海水中NO3-N最高值出现在调查海区的东部;PO4-P和SiO3-Si的分布特征与NO3-N相似;NH4-N表层分布呈现出高值和低值交替出现的特征,底层则呈现近岸高,远岸低的特征。

英文摘要：

The variations in nutrient concentration and distribution were analyzed according to the investigation for green tide of Enteromorpha prolifera occurrence areas of the Yellow Sea,during July 22 to 26 and August 5 to 14,2008.The results showed that average concentration of NH4-N（0.34 μmol/L） during the latter voyage was lower than that during the former one,while average concentrations of NO3-N,PO4-P and SiO3-Si（4.63,0.39,6.76 μmol/L respectively） during the latter voyage were higher than those during the former one.PO4-P had showed the largest change in the average concentration,with NH4-N followed.The nutrient concentrations in southwest part of the survey area were relatively higher due to the terrestrial runoff and northern Jiangsu coastal current,which contributed to the outbreak of green tide.Distribution of nutrients were as follows： the highest values in surface water of NO3-N,PO4-P and SiO3-Si appeared in the southwest of the survey area,while the highest values in bottom water of them appeared in the east part.When it came to NH4-N,it appeared as the alternating trend of high and low values in surface water,and gradually decreasing from coast to offshore in bottom.