DOI: 10.1002/2017JC013453
Scopus记录号: 2-s2.0-85041094378
论文题名: Inversion of In Situ Light Absorption and Attenuation Measurements to Estimate Constituent Concentrations in Optically Complex Shelf Seas
作者: Ramírez-Pérez M. ; Twardowski M. ; Trees C. ; Piera J. ; McKee D.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 1 起始页码: 720
结束页码: 737
语种: 英语
英文关键词: inherent optical properties
; Ligurian Sea
; material-specific IOPs
; spectral deconvolution model
Scopus关键词: absorption
; chlorophyll
; concentration (composition)
; data set
; light attenuation
; optical property
; regression analysis
; shelf sea
; spectral analysis
; Ligurian Sea
; Mediterranean Sea
英文摘要: A deconvolution approach is presented to use spectral light absorption and attenuation data to estimate the concentration of the major nonwater compounds in complex shelf sea waters. The inversion procedure requires knowledge of local material-specific inherent optical properties (SIOPs) which are determined from natural samples using a bio-optical model that differentiates between Case I and Case II waters and uses least squares linear regression analysis to provide optimal SIOP values. A synthetic data set is used to demonstrate that the approach is fundamentally consistent and to test the sensitivity to injection of controlled levels of artificial noise into the input data. Self-consistency of the approach is further demonstrated by application to field data collected in the Ligurian Sea, with chlorophyll (Chl), the nonbiogenic component of total suspended solids (TSSnd), and colored dissolved organic material (CDOM) retrieved with RMSE of 0.61 mg m−3, 0.35 g m−3, and 0.02 m−1, respectively. The utility of the approach is finally demonstrated by application to depth profiles of in situ absorption and attenuation data resulting in profiles of optically significant constituents with associated error bar estimates. The advantages of this procedure lie in the simple input requirements, the avoidance of error amplification, full exploitation of the available spectral information from both absorption and attenuation channels, and the reasonably successful retrieval of constituent concentrations in an optically complex shelf sea. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114742
Appears in Collections: 气候减缓与适应
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作者单位: Physical and Technological Oceanography Department, Institute of Marine Sciences, Barcelona, Spain; Harbor Branch Oceanographic Institute, Florida Atlantic University, Ft. Pierce, FL, United States; Research Department, Centre for Maritime Research and Experimentation, La Spezia, Italy; Physics Department, University of Strathclyde, Glasgow, United Kingdom
Recommended Citation:
Ramírez-Pérez M.,Twardowski M.,Trees C.,et al. Inversion of In Situ Light Absorption and Attenuation Measurements to Estimate Constituent Concentrations in Optically Complex Shelf Seas[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)