文献类型：期刊文献

英文题名：Analysis of the regional spectral properties in northwestern South China Sea based on an empirical orthogonal function

作者：Fu, Dongyang[1];Huang, Yuye[2,3];Liu, Dazhao[1];Liao, Shan[1];Yu, Guo[1];Zhang, Xiaolong[1]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[2]Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Peoples R China;[3]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2020

卷号：39

期号：7

起止页码：107

外文期刊名：ACTA OCEANOLOGICA SINICA

收录：SCI-EXPANDED(收录号：WOS:000564961000011)、、Scopus(收录号：2-s2.0-85089777530)、WOS

语种：英文

外文关键词：northwestern South China Sea; remote sensing reflectance; empirical orthogonal function analysis; ocean color control factors

外文摘要：This study presents an analysis of the spectral characteristics of remote sensing reflectance (R-rs) in northwestern South China Sea based on thein situoptical and water quality data for August 2 018.R(rs)was initially divided into four classes, classes A to D, using the max-classification algorithm, and the spectral properties of wholeR(rs)were characterized using the empirical orthogonal function (EOF) analysis. Subsequently, the dominant factors in each EOF mode were determined.The results indicated that more than 95% of the variances ofR(rs)are partly driven by the back-scattering characteristics of the suspended matter. The initial two EOF modes were well correlated with the total suspended matter and back-scattering coefficient. Furthermore, the first EOF modes of the four classes ofR(rs)(A-DRrs-EOF1) significantly contributed to the total variances of eachR(rs)class. In addition, the correlation coefficients between the amplitude factors of class A-DRrs-EOF(1)and the variances of the relevant water quality and optical parameters were better than those of the unclassified ones. The spectral shape of class AR(rs)-EOF(1)was governed by the absorption characteristic of chlorophyllaand colored dissolved organic matter (CDOM). The spectral shape of class BRrs-EOF(1)was governed by the absorption characteristic of CDOM since it exhibited a high correlation with the absorption coefficient of CDOM (a(g)(lambda)), whereas the spectral shape of class CRrs-EOF(1)was governed by the back-scattering characteristics but not affected by the suspended matter. The spectral shape of class DRrs-EOF(1)exhibited a relatively good correlation with all the water quality parameters, which played a significant role in deciding its spectral shape.