Absorption Coefficient and Chlorophyll Concentration of Oceanic Waters Estimated from Band Difference of Satellite-Measured Remote Sensing Reflectance

作     者：Zhongping Lee Longteng Zhao Chuanmin Hu Daosheng Wang Junfang Lin Shaoling Shang 

作者机构：State Key Laboratory of Marine Environmental ScienceCollege of Ocean and Earth SciencesXiamen UniversityXiamen 361102China College of Marine ScienceUniversity of South FloridaSt.PetersburgSt.PetersburgFL 33701USA Plymouth Marine Laboratory Prospect PlaceThe HoePlymouth PL13DHUK 

出 版 物：《Journal of Remote Sensing》 (国际遥感学报（英文）)

年 卷 期：2023年第3卷第1期

页      面：264-272页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 09[农学] 0804[工学-仪器科学与技术] 0903[农学-农业资源与环境] 0816[工学-测绘科学与技术] 081602[工学-摄影测量与遥感] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

基　　金：Financial support by the National Natural Science Foundation of China(#41890803 #41830102 #41941008 and#42250710150)is greatly appreciated 

主　　题：waters oceanic ocean 

摘      要：Absorption coefficient and chlorophyll concentration(Chl)are important optical and biological properties of the aquatic environment,which can be estimated from the spectrum of water color,commonly measured by the remote sensing reflectance(Rrs).In this study,we extended the band-difference scheme for Chl of oceanic waters developed a decade ago to the estimation of absorption coefficient at 440 nm(a(440)).As demonstrated earlier for the estimation of Chl,a(440)product from the band difference of Rrs showed much smoother spatial pattern than that from a semianalytical *** importantly,it is found that the upper limit of using band difference of Rrs can be extended from−0.0005 sr^(−1)(the upper limit set a decade ago for the estimation of Chl)to~0.0005 sr^(-1)(corresponding to a(440)~0.08 m^(-1)),which covers~91% of the global *** further converted a(440)to Chl based on the“Case-1water assumption and found that the standard Chl product of oligotrophic waters(Chl~0.1 mg/m^(3))distributed by NASA is generally~20% higher than Chl converted from a(440),possibly a result of different datasets used to determine the algorithm *** results not only extended the application of the band-difference scheme for more oceanic waters but also highlighted the need of more accurate field measurements of Chl and R_(rs) in oligotrophic oceans in order to minimize the discrepancies observed in satellite Chl products derived using the same algorithm concept but different empirical approaches.