首页 | 本学科首页   官方微博 | 高级检索  
     

基于浮标观测的东海赤潮高发区秋、冬季漫射衰减系数的反演
引用本文:张雨,王桂芬,许占堂,杨跃忠,周雯,郑文迪,曾凯,邓霖. 基于浮标观测的东海赤潮高发区秋、冬季漫射衰减系数的反演[J]. 热带海洋学报, 2020, 39(5): 71-83. DOI: 10.11978/2019084
作者姓名:张雨  王桂芬  许占堂  杨跃忠  周雯  郑文迪  曾凯  邓霖
作者单位:1.热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东 广州 5103012.中国科学院大学, 北京 1000493.河海大学海洋学院, 江苏 南京 2100984.南方海洋科学与工程广东省实验室, 广东 广州 511458
基金项目:国家自然科学基金(41576030);国家自然科学基金(41776044);国家自然科学基金(41776045);国家自然科学基金(41976172);广州市科技计划重点项目(201607020041);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0305)
摘    要:浮标测量的光学数据时间序列长、分辨率高, 能可靠地测量快速变化的漫射衰减系数(Kd)。东海赤潮高发区水体中的浮游植物生物量及悬浮泥沙含量存在较大的变化, 光学性质复杂。文章利用2013年9月至2014年1月的海洋光学浮标数据, 获得了该海域水体的表观光学特性, 基于Kd(490)与遥感反射比[Rrs(λ)]的相关关系建立了Kd(490)的经验算法, 并与已有7种反演算法进行了比较。结果表明, 该海域的Kd(λ)及Rrs(λ)具有显著的Ⅱ类水体光谱特征, 其中, Kd(490)的范围为0.01~4.31m-1, 水体的浑浊程度变化大。Kd(490)与Rrs比值的相关性较好, 据此建立了以Rrs(650)/Rrs(510)、Rrs(555)/Rrs(510)作为自变量的Kd(490)双比值经验算法。将新建算法反演获得的Kd(490)与实测Kd(490)相比, 均方根误差、平均相对误差百分比和线性回归的决定系数分别为0.27m-1、27.08%和0.77, 优于其他7种算法。算法精度的提高源于新建算法选择的Rrs能充分反映水体信息, 并适应水体组分的变化, 可为东海赤潮高发区Kd(490)的反演提供较好的选择, 并为海洋光学浮标在水体环境监测中的应用提供示例。

关 键 词:东海赤潮高发区  海洋光学浮标  漫射衰减系数  遥感反射率  Kd(490)反演算法  
收稿时间:2019-09-09
修稿时间:2019-12-11

Retrieval of diffuse attenuation coefficient in high frequency red tide area of the East China Sea based on buoy observation
ZHANG Yu,WANG Guifen,XU Zhantang,Yang Yuezhong,ZHOU Wen,ZHENG Wendi,ZENG Kai,DENG Lin. Retrieval of diffuse attenuation coefficient in high frequency red tide area of the East China Sea based on buoy observation[J]. Journal of Tropical Oceanography, 2020, 39(5): 71-83. DOI: 10.11978/2019084
Authors:ZHANG Yu  WANG Guifen  XU Zhantang  Yang Yuezhong  ZHOU Wen  ZHENG Wendi  ZENG Kai  DENG Lin
Affiliation:1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China2. University of Chinese Academy of Sciences, Beijing 100049, China3. College of Oceanography, Hohai University, Nanjing 210098, China4. Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou 511458, China
Abstract:The optical data measured by a buoy, with long time series and high temporal resolution, can be reliably used for obtaining the rapidly changing diffuse attenuation coefficient (Kd). The biomass of phytoplankton and the concentration of suspended sediment vary widely in the high-incidence red tide area of the East China Sea, resulting in complex changes in optical properties. In this article, the spectrum data collected by a marine optical buoy from September 2013 to January 2014 were used to obtain the apparent optical characteristics of the sea area, then an empirical algorithm of Kd(490) was established based on the correlation between Kd(490) and remote sensing reflectance (Rrs(λ)), and compared with seven kinds of existing algorithms. The results indicated that Kd(λ) and Rrs(λ) present significant features of class Ⅱ water body spectrum, Kd(490) varies from 0.01 m-1 to 4.31 m-1, and the turbidity also varies greatly. According to the good correlation of Kd(490) and Rrs band ratio, a dual-band ratio empirical algorithm was established, taking Rrs(650) / Rrs(510) and Rrs(555) / Rrs(510) as independent variables. New algorithm is superior to the other seven algorithms, the root mean square error, absolute percentage difference and coefficient of correlation coefficient are 0.27 m -1, 27.08 % and 0.77, respectively, between the new algorithm inversion Kd(490) and the measured values. The improvement of the accuracy of the algorithm is due to the fact that the Rrs selected by the new algorithm can fully reflect water body information and adapt to the changes of water composition in this sea area. This study provides a better choice for the inversion of the high-incidence red tide area in the East China Sea, and an example for the application of marine optical buoy in water environment monitoring.
Keywords:high-frequency red tide area of the East China Sea  marine optical buoy  diffuse attenuation coefficient  remote sensing reflectance  inversion algorithm of Kd(490)  
本文献已被 CNKI 等数据库收录!
点击此处可从《热带海洋学报》浏览原始摘要信息
点击此处可从《热带海洋学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号