摘要
浮游植物比吸收系数是关联浮游植物生物量与吸收光谱的重要参数。对浮游植物种群比吸收系数的量化分析,可弥补黄渤海浮游植物种群比吸收光谱研究的不足,为监测浮游植物种群浓度提供新思路。结合2016年6月黄渤海航次的浮游植物吸收系数与色素浓度数据,利用CHEMTAX软件分析得到黄渤海8个优势藻种的浓度。运用留一法,对吸收系数与藻种浓度数据进行多元线性回归分析,提取各藻类比吸收光谱,重建总吸收光谱。结果显示,模型反演效果较好,重构的吸收光谱与实测光谱在蓝、红光波段具有较高的一致性。此外,分析优势藻种对浮游植物吸收系数的贡献时,发现在所有优势藻种中,定鞭藻对浮游植物的吸收贡献最大,蓝藻次之。
Phytoplankton specific absorption coefficient is an important optical parameter associated with phytoplankton biomass and absorption spectrum.The quantitative analysis of specific absorption coefficients of phytoplankton populations makes up for the deficiency of specific absorption spectra of phytoplankton populations in Yellow Sea and Bohai Sea,and provides a new idea for monitoring the phytoplankton population concentration.Combined with the phytoplankton absorption coefficient and pigment concentration data collected during the cruise in Yellow sea and Bohai Sea in June,2016,CHEMTAX software is used to analyze the concentrations of eight dominant alga species in Yellow Sea and Bohai Sea.The multiple linear regression analysis of the absorption coefficient and concentration data of algal species is carried out by using the LOO-CV method,the specific absorption spectra of each algae are extracted,and the total absorption spectra are reconstructed.The results show that the model inversion is effective,and the reconstructed absorption spectrum is consistent with the measured spectra in blue and red wavebands.In addition,when analyzing the contribution of dominant alga species to phytoplankton absorption coefficient,it is found that among all dominant alga species,the dinoflagellate gives the greatest contribution to phytoplankton absorption,followed by cyanobacteria.
作者
李楠
孙德勇
环宇
王胜强
张海龙
丘仲锋
何宜军
Li Nan;Sun Deyong;Huan Yu;Wang Shengqiang;Zhang Hailong;Qiu Zhongfeng;He Yijun(School of Marine Sciences,Nanjing University of Information Science and Technology,Nangjing,Jiangsu 210044,China;Jiangsu Key Laboratory of Ocean Dynamics Remote Sensing and Acoustics,Nangjing,Jiangsu 210044,China;Jiangsu Research Center for Ocean Survey Technology,Nangjing,Jiangsu 210044,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2020年第6期28-37,共10页
Acta Optica Sinica
基金
国家自然科学基金(41876203,41576172)
江苏高校“青蓝工程”中青年学术带头人(R2019Q07)
江苏省“六大人才高峰”高层次人才项目(JY-084)
南京信息工程大学人才启动经费(2019R058)
南京市留学人员科技创新项目(R2019LZ05)
江苏省海洋科技创新项目(HY2017-5)。
关键词
海洋光学
浮游植物比吸收系数
线性分解模型
种群浓度
黄渤海
oceanic optics
phytoplankton specific absorption coefficient
linear decomposition model
population concentration
Yellow Sea and Bohai Sea
