天津沿海赤潮发生的基本特征研究

使用《天津市海洋环境状况公报》中的数据,分析天津沿海赤潮发生的特征。通过分析发现2005-2017年天津海域共发生赤潮30次,累计发生面积4 695 km2。天津沿海赤潮发生主要集中在夏季,又以8月最多,占赤潮发生总数的30%。通过赤潮优势种的分析发现近年来天津海域赤潮生物的优势种类有不断增加的趋势。同时本文从水文气象条件诱发赤潮的角度分析得出了天津沿海最易发生赤潮的天气形势,天津沿海25~27℃水温范围内赤潮发生较多,最适宜赤潮发生的风速为3、4级风,风向为东南风、西南风。

Research on the basic characteristics of red tide in Tianjin coastal area

This paper analyses the characteristics of red tide occurrence in Tianjin coastal area used the data of Tianjin Marine Environment Bulletin. It is found that red tide occurred 30 times with a total area of 4 695 square kilometers from 2005 to 2017. The red tide often occurs in summer with the peak period in August, which accounts for 30% of the total red tide events. In recent years, the dominant species of red tide in Tianjin coastal area have been increasing. Based on the analysis of the hydrometeorological conditions that are most prone to the occurrence of red tide in Tianjin coastal area, it is found that water temperature between 25 and 27 ℃, wind force 3 and 4, and southeast and southwest winds are most favorable for the occurrence of red tides in the Tianjin coastal area.