The variations in optical properties of CDOM throughout an algal bloom event
Zhao, J; Cao, WX; Wang, GF; Yang, DT; Yang, YZ; Sun, ZH; Zhou, W; Liang, SJ; wxcao@scsio.ac.cn
2009
发表期刊ESTUARINE COASTAL AND SHELF SCIENCE
ISSN0272-7714
卷号82期号:2页码:225-232
摘要For studies in bio-optical oceanography, visible light properties by classes of dissolved organic matter should be characterized. The regional adjustment of model parameters is one approach which is being widely used to refine bio-optical models. In the present study, buoy and laboratory data were acquired, and during the 15-day observation period an algal bloom event occurred. The absorption coefficient of CDOM at 443 nm, a(g)(443), changed in the range of 0.09-0.35 m(-1) and 0.1-0.34 m(-1) for two depths, 0.32 m and 2.3 m., respectively, throughout the entire period. CDOM absorption was larger for bloom conditions than for non-bloom conditions. In addition, the fraction of CDOM in total absorption was higher during the bloom event than that of non-bloom conditions. The spectral slope of CDOM absorption, S., regressed over 400-500 nm, ranged from 0.015 to 0.0185 nm(-1) with an average of 0.0166 nm(-1). CDOM fluorescence intensity (Fcdom) was obtained using an internal Raman standard and varied over the range of 467.44-1538.23 in relative units. Variations in Fcdom showed a similar pattern to that of CDOM absorption. A robust non-linear relationship between Fcdom and CDOM absorption was found, with a correlation coefficient of 0.893, throughout the whole observation. An attempt to describe S-g with absorption showed a promising consequence that can be described with a negative correlation during the bloom, however, without any distinguishable tendency for non-bloom time span. A two-band ratio algorithm was also carried out for retrieving CDOM absorption. The variations in optical properties of CDOM may be related to the complicated environment in the estuarine waters, which may result from different sources of CDOM. (C) 2009 Elsevier Ltd. All rights reserved.
部门归属[Cao, Wenxi] Chinese Acad Sci, Key Lab Trop Marine Environm Dynam, S China Sea Inst Oceanol, LED, Guangzhou 510301, Guangdong, Peoples R China; [Zhao, Jun; Liang, Shaojun] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
关键词Pearl River Estuary Cdom Absorption Fluorescence Algal Blooms Remote Sensing
学科领域Marine & Freshwater Biology ; Oceanography
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收录类别sci
资助项目LED
WOS记录号WOS:000265011300007
引用统计
被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/6131
专题热带海洋环境国家重点实验室(LTO)
通讯作者wxcao@scsio.ac.cn
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Zhao, J,Cao, WX,Wang, GF,et al. The variations in optical properties of CDOM throughout an algal bloom event[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2009,82(2):225-232.
APA Zhao, J.,Cao, WX.,Wang, GF.,Yang, DT.,Yang, YZ.,...&wxcao@scsio.ac.cn.(2009).The variations in optical properties of CDOM throughout an algal bloom event.ESTUARINE COASTAL AND SHELF SCIENCE,82(2),225-232.
MLA Zhao, J,et al."The variations in optical properties of CDOM throughout an algal bloom event".ESTUARINE COASTAL AND SHELF SCIENCE 82.2(2009):225-232.
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