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学科主题: Optics
题名: Approach for determining the contributions of phytoplankton, colored organic material, and nonalgal particles to the total spectral absorption in marine waters
作者: [Lin, Junfang ; Cao, Wenxi ; Wang, Guifeng ; Hu, Shuibo] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Lin, Junfang ; Hu, Shuibo] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
通讯作者: wxcao@scsio.ac.cn
刊名: APPLIED OPTICS
发表日期: 2013
卷: 52, 期:18, 页:4249-4257
部门归属: LTO
资助者: This study was supported jointly by several Key Projects of the National Natural Science Foundation of China (grants 41076014, U0933005, U1033003, 41176035, and 41206029). We also thank SeaBASS and all the contributors to the NOMAD and BBOP data sets.
摘要: Using a data set of 1333 samples, we assess the spectral absorption relationships of different wave bands for phytoplankton (ph) and particles. We find that a nonlinear model (second-order quadratic equations) delivers good performance in describing their spectral characteristics. Based on these spectral relationships, we develop a method for partitioning the total absorption coefficient into the contributions attributable to phytoplankton [alpha(ph)(lambda)], colored dissolved organic material [CDOM; alpha(CDOM)(lambda)], and nonalgal particles [NAP; alpha(NAP)(lambda)]. This method is validated using a data set that contains 550 simultaneous measurements of phytoplankton, CDOM, and NAP from the NASA bio-Optical Marine Algorithm Dataset. We find that our method is highly efficient and robust, with significant accuracy: the relative root-mean-square errors (RMSEs) are 25.96%, 38.30%, and 19.96% for alpha(ph)(443), alpha(CDOM)(443), and the CDOM exponential slope, respectively. The performance is still satisfactory when the method is applied to water samples from the northern South China Sea as a regional case. The computed and measured absorption coefficients (167 samples) agree well with the RMSEs, i.e., 18.50%, 32.82%, and 10.21% for alpha(ph)(443), alpha(CDOM)(443), and the CDOM exponential slope, respectively. Finally, the partitioning method is applied directly to an independent data set (1160 samples) derived from the Bermuda Bio-Optics Project that contains relatively low absorption values, and we also obtain good inversion accuracy [RMSEs of 32.37%, 32.57%, and 11.52% for alpha(ph)(443), alpha(CDOM)(443), and the CDOM exponential slope, respectively]. Our results indicate that this partitioning method delivers satisfactory performance for the retrieval of alpha(ph), alpha(CDOM), and alpha(NAP). Therefore, this may be a useful tool for extracting absorption coefficients from in situ measurements or remotely sensed ocean-color data. (C) 2013 Optical Society of America
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000320708500021
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10903
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Recommended Citation:
[Lin, Junfang; Cao, Wenxi; Wang, Guifeng; Hu, Shuibo] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Lin, Junfang; Hu, Shuibo] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.Approach for determining the contributions of phytoplankton, colored organic material, and nonalgal particles to the total spectral absorption in marine waters,APPLIED OPTICS,2013,52(18):4249-4257
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