2013年小岞杜厝海域赤潮发生过程分析  

Analysis on the process of the harmful algal bloom in Xiaozuo and Ducuo sea area in 2013

作　　者：李星 

机构地区：[1]福建省海洋预报台,福建福州350003

出　　处：《海洋预报》2014年第4期68-76,共9页Marine Forecasts

基　　金：国家科技支撑项目(2013BAB04B00);福建省科技计划重点项目(2011Y0004)

摘　　要：针对2013年5月15—17日发生在小岞、杜厝海域的2起赤潮过程,利用观测资料、数值模拟等方法,从气象、水文、水质等方面分析其发生及消亡原因。本文分析了赤潮发生前后事发附近海域的天气形势,气温、气压、湿度等气象资料的变化情况,同时结合浮标实测中水温、流向等水文资料,并利用数值模拟方法模拟该时段内风力、风向的变化,得出以下结论。(1)赤潮发生前副高北抬,南海夏季风爆发,此种天气形势带来了西南暖湿空气,气温、水温持续升高,风浪较小,在这种高温、高湿、无风浪的条件下,促进藻类繁殖,在小岞附近海域发生赤潮;(2)赤潮发展旺盛期内,出现阵性降水,偏南风风力明显增大,强劲的西南风造成水体不稳定,可能是造成藻种演替的原因;另外在杜厝新增一处赤潮区,推测可能由于西南风造成的藻种漂移。The reason of the occurrence and disappearance of the harmful algal bloom in Xiaozuo and Ducuo sea area during May 15^th-17^th 2013 is discussed by using observation data and numerical simulation methods, in terms of meteorology, hydrology, water quality and other aspects. According to water temperature, flow direction and other hydrological data measured by buoys, and the variation of wind speed and wind direction from numerical simulation results, the variation of weather, temperature, air pressure, humidity and other meteorological data before and after the process are analyzed. The results are as follows： （1） With the subtropical high moving northward and summer monsoon onset in the South China Sea, the southwest warm wet air makes both the air temperature and water temperature rise, and the wave smaller. The situation of such high temperature, high humidity and small wave is favorable for algal bloom in Xiaozuo area. （2） During the strong development of algal, strong southwesterly wind causes water unstable when showery precipitation occurs and southwest wind increases significantly, which is probably the reason of the succession of dominant algal species. In addition, the new area of algal bloom in Ducuo sea area is probably due to the southwesterly wind which causes the algae drift.

关 键 词：赤潮 天气形势 水文条件 数值预报 

分 类 号：X55[环境科学与工程—环境工程]