Inversion of Beibu Gulf Chlorophyll a Concentration based on Sentinel-3A Satellite
This study,focused on the area of Beibu Gulf,explores the remote sensing inversion method for chlo-rophyll concentration based on the Sentinel-3A satellite's OCLI water color sensor.The study partitions the Bei-bu Gulf by using measured spectral data and then combines the measured chlorophyll-a concentration with Senti-nel-3A remote sensing data of which aims to build the remote sensing inversion model for chlorophyll-a concen-tration.The results show that(1)the remote sensing reflectance curves exhibit distinct partition characteristics,dividing the area into nearshore,transitional,and offshore water types based on the spectral features;(2)Dif-ferent water types require different inversion factors for model construction,and all of them got relatively good fitted result.Among them,the fitted inversion factor is Rrs(764.375)/Rrs(681.25)that could be used in the near-shore water,for the transitional water,[1/Rrs(620)-1/Rrs(708.75)]/Rrs(753.75)is the most suitable,and for the offshore water,Rrs(708.75)-Rrs(764.375)achieves the best fitting performance,with corresponding R2 val-ues of 0.67,0.80,and 0.8,respectively;(3)The partitioning method effectively improves the applicability and accuracy of the remote sensing inversion model for chlorophyll concentration in the Beibu Gulf.This study suc-cessfully realizes the remote sensing inversion of chlorophyll concentration in the Beibu Gulf by using a partition-ing model based on Sentinel-3A satellite's OCLI data.The result provides the important scientific support for the remote sensing monitoring of chlorophyll concentration in the Beibu Gulf,and enhances the management and protection of marine ecological environments.
Chlorophyll a concentrationinversionBeibu GulfSentinel-3A satellite
NETL
NSTL
万方数据
维普
