文献类型：期刊文献

中文题名：Spatiotemporal characteristics and remote sensing estimation of colored dissolved organic matter around the Leizhou Peninsula

作者：Dongyang FU[1,2];Shiyun WEI[1];Guo YU[1,2];Yafei LUO[1,2];Huabing XU[1,2];Zhaoguang CHEN[1]

机构：[1]College of Electronic and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,China;[2]Guangdong Provincial Engineering and Technology Research Center of Marine,Zhanjiang 524088,China

年份：2023

卷号：41

期号：4

起止页码：1405

中文期刊名：Journal of Oceanology and Limnology

外文期刊名：海洋湖沼学报（英文）

收录：CSTPCD、、CSCD2023_2024、Scopus、CSCD、PubMed

基金：Supported by the Key Projects of the Guangdong Education Department(No.2019KZDXM019);the Fund of Southern Marine Science and Engineering Guangdong Laboratory(Zhanjiang)(No.ZJW-2019-08);the High-level Marine Discipline Team Project of Guangdong Ocean University(No.002026002009);the Guangdong Graduate Academic Forum Project(No.230420003);the“First Class”Discipline Construction Platform Project in 2019 of Guangdong Ocean University(No.231419026);the Innovation Projects of Colleges and Universities in Guangdong Province(No.2021KQNCX028)。

语种：英文

中文关键词：colored dissolved organic matter(CDOM);ocean and land color instrument(OLCI);spectral slope;hyperbolic-exponential model;inversion

中文摘要：Colored dissolved organic matter(CDOM)is an important optically active substance in marine environment.Its biochemical conservatism makes it an important indicator to offshore pollution process.Monitoring the content,composition,and diffusion process of CDOM is a good approach to analyze the terrestrial input,optical properties,and ecological environment of offshore areas.The spatiotemporal characteristics of CDOM around the Leizhou Peninsula were analyzed based on field observation data collected in the autumn 2020 and spring 2021,and an empirical inversion model of the ag(355)(absorption coefficient at 355 nm)and spectral slope(Sg)(g stands for gelbstoff/gilvin,which is called CDOM)based on Sentinel-3A ocean and land color instrument(OLCI)images was constructed.The results show(1)the order of average ag(355)value around the Leizhou Peninsula was east coast(0.503/m)>Qiongzhou Strait(0.502/m)>west coast(0.365/m);(2)the best band combinations of CDOM inversion in spring and autumn were(B4+B11)/B3 and(B7-B1)/B6(B stands for the band of spectral images),and the final inversion results are close to the measured results,indicating that the model has good accuracy;(3)the S_(g)value of the CDOM absorption spectrum was fitted to the hyperbolicexponential model.The fitting accuracy of the model was higher than those of the exponential model and the hyperbolic model,and the best S_(g)inversion model was constructed by selecting Sg(275-295)and Sg(250-295)in spring and autumn;(4)the spatial distributions of ag(355)and S_(g)were inverted,and CDOM in the waters around the Leizhou Peninsula originated from terrestrial organic matter carried by coastal aquaculture zones and runoff in the northeast Zhanjiang and the northern Beibu Gulf.