摘要
近年来海洋生态灾害频发,大量漂浮藻类聚集在海面和近岸海域,给沿岸城市的经济活动和生态健康带来了严重危害。本研究利用HY-1C、GF-1和HJ-1A/1B卫星遥感影像对南黄海海域2016-2020年4-6月份的马尾藻进行了信息提取和生长阶段的划分,并通过MODIS海温数据、光合有效辐射数据和海面风场数据来探究环境因子对马尾藻时空分布的影响。结果表明:(1)从时间上看马尾藻集中在每年的4-6月份暴发,2017年马尾藻的影响范围最大,其余年份较小;从空间上看马尾藻最早在长江入海口东北部远海被监测到,在35°~36°N附近海域消失;(2)从生长速率上看,马尾藻的生长阶段可以划分为“发展-暴发-消亡”3个阶段;(3)在不同的生长阶段,海水温度和光合有效辐射对马尾藻具有不同程度的影响,较高的海表温度和光合有效辐射导致2017年面积高于往年;在东南风的作用下,马尾藻呈从东南向西北漂移的趋势,这说明了马尾藻的时空特征受到多种环境因子的影响。
The marine ecological disasters occurred frequently in recent years.A large number of floating algae gather in the sea surface and inshore water,which brings serious harm to the economic activities and ecological health of coastal cities.In this study,HY-1C,GF-1 and HJ-1A/1B satellite remote sensing images were used to extract information and divide the growth stages of Sargassum in the South Yellow Sea from April to June in 2016 to 2020,combined with the MODIS sea surface temperature data,photosynthetically active radiation data and sea surface wind data to explore the effects of environmental factors on the temporal and spatial distribution of Sargassum.The results show that:(1)In terms of time,the Sargassum mainly appeared from April to June every year.Sargassum had the largest range of influence in 2017 and smaller in other years.In terms of space,the Sargassum was first detected in the far sea northeast of the Changjiang River Estuary and disappeared in the sea near 35°-36°N.(2)In terms of growth rate,the growth phase of Sargassum could be divided into three stages:“development-outbreak-extinction”.(3)At different growth stages,sea surface temperature and photosynthetically active radiation had different degrees of influence on Sargassum.The larger area of Sargassum in 2017 was mainly influenced by higher sea surface temperature and photosynthetically active radiation.The southeast monsoon promoted the drift of Sargassum from the southeast to the northwest and north.This shows that the spatiotemporal characteristics of Sargassum are affected by a variety of environmental factors.
作者
郑龙啸
吴孟泉
赵杰
王东亮
周敏
赵连杰
Zheng Longxiao;Wu Mengquan;Zhao Jie;Wang Dongliang;Zhou Min;Zhao Lianjie(College of Resources and Environmental Engineering,LuDong University,Yantai 264025,China;Yantai Geographic Information Center,Yantai 264039,China;Yantai Marine Environment Monitoring and Forecasting Center,Yantai 264040,China)
出处
《海洋学报》
CAS
CSCD
北大核心
2022年第5期12-24,共13页
基金
国家自然科学基金(42071385)
山东省自然科学基金(ZR2019MD041,ZR2015DM015)
山东省海上航天装备技术创新中心(鲁东大学)开放课题基金(HHCXZX-2021-12)。
关键词
HY-1C卫星
VB-FAH
马尾藻
海表温度
光合有效辐射
南黄海
HY-1C satellite
VB-FAH
Sargassum
sea surface temperature
photosynthetically active radiation
South Yellow Sea
