基于现场调查和GOCI卫星遥感下东海原甲藻赤潮生消特征  

Evidences from Satellite Remote Sensing and Field Portrait to A Prorocentrum donghaiense Bloom

作　　者：刘淑娟 杨萌萌 沈盎绿 LIU Shu-juan;YANG Meng-meng;SHEN Ang-lu(National Engineering Research Center for Marine Aquaculture,Zhoushan 316022,China;Postgraduate College for Environment,Nagoya University of Japan,Nagoya 4648601,Japan;College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 201306,China)

机构地区：[1]国家海洋设施养殖工程技术研究中心,浙江舟山316022 [2]日本名古屋大学环境研究生院,日本名古屋4648601 [3]上海海洋大学海洋生态与环境学院,上海201306

出　　处：《浙江海洋大学学报（自然科学版）》2019年第6期509-516,共8页Journal of Zhejiang Ocean University：Natural Science

基　　金：国家自然科学基金青年项目(41506194);中央级公益性科研院所基本科研业务费专项资金项目(2015M06)。

摘　　要：浙江省南部沿海地区是赤潮频发的显著地区之一。本文通过现场调查以及利用世界首个海色静止卫星COMS(communication, ocean&meteorological satellite)上搭载的GOCI(geostationary ocean color Imager)传感器数据,分析了2016年5月洞头和南麂列岛附近海域东海原甲藻赤潮生消过程。根据现场调查浮游植物绝对优势种东海原甲藻细胞丰度,将现场调查区域爆发的东海原甲藻赤潮过程分为生长阶段(5月9日至5月12日)、维持阶段(5月13日至5月18日)和消散阶段(5月19日和20日) 3个阶段,赤潮维持阶段现场叶绿素a(Chl a)浓度显著高于生长阶段和消亡阶段。通过GOCI卫星反演的Chl a浓度、赤潮指数(red tide index,RI>2.8定义为赤潮爆发面积),显示了赤潮的发展趋势,即从洞头群岛的东北方向逐步向南麂列岛西南方向迁移。另外,从5月12日Chl a日变化图像分析结果来看,东海原甲藻赤潮日变化主要中由潮汐和藻类本身垂直迁移共同决定。因此,根据GOCI数据结合现场调查可以有效地监测东海原甲藻赤潮的短期(日变化)和长期(赤潮的整个过程)变化过程。The southern coastal areas of Zhejiang Province are one of the most prominent areas for frequent occurrence of harmful algal blooms. In the present study, based on the field investigation and the data of GOCI sensor carried on the world’s first sea-color geostationary satellite COMS, the process of bloom generation and elimination of Prorocentrum donghaiense in the waters between Dongtou and Nanji Islands in May2016 was analyzed. The process of this P. donghaiense bloom could be divided into the growth phase(from 9 to12 May), maintenance phase(from 13 to 18 May), and dissipation phase(19 and 20 May) based on the cell abundance of the dominant species of phytoplankton of P. donghaiense got from field data. And the Chlorophyll a(Chl a) changes showed that its concentration in the maintenance phase was significantly higher than those in the growth and dissipation phases. The concentration of Chl a and the red tide index(RI>2.8 defined as the red tide outbreak area) inversion by the GOCI satellite show the trend of the bloom, which is gradually moving from the northeast direction of the Dongtou Islands to the southwest of the Nanji Islands. In addition, the hourly Chl a images on 12 May showed the bloom evolution through the course of a day driven by tides and vertical migration. Therefore, the short-term(diurnal changes) and long-term(the whole process of the bloom)movements of red tide in the East China Sea can be monitored more effectively based on GOCI and field data.

关 键 词：东海原甲藻赤潮 静止海洋水色卫星 遥感 叶绿素A 赤潮过程 

分 类 号：Q142[生物学—生态学] X55[生物学—普通生物学]