Hyperspectral optical absorption closure experiment in complex coastal waters
Hyperspectral optical absorption closure experiment in complex coastal waters
复制标题
复杂近海水域高光谱光吸收闭合实验
作者：
Kostakis I
Accurate measurements of absorption data are required for the development and validation of inversion algorithms for upcoming hyperspectral ocean color imaging sensors, such as the NASA Phytoplankton, Aerosol, Cloud, and ocean Ecosystem mission. This study aims to provide uncertainty estimates associated with leading approaches to measure hyperspectral absorption coefficients in complex coastal waters. Absorption spectra were collected at 12 different stations, all located in the Indian River Lagoon, Florida, USA, between 09 January 2017 and 13 January 2017. Measurements included spectral absorption coefficients in the visible range (400–700 nm) associated with dissolved,aCDOM, total particulate,ap, and total nonwater,anw, fractions, and were made both in situ and from discrete samples. Discrete sample approaches included dual‐beam spectrophotometer, liquid waveguide capillary cell, point‐source integrating cavity absorption meter (PSICAM) for dissolved matter absorption samples, and quantitative filter technique ICAM measurements and the dual‐beam spectrophotometer with center‐mounted integrating sphere filter pad technique, while the Turner Designs ICAM, and WET Labs AC‐s, and AC‐9 instruments were used to determine absorption coefficients in situ. The Gershun approach, determining absorption from measurement of the irradiance quartet with respect to depth was also assessed in situ. Measurement uncertainties and relative accuracies were quantified for each of these approaches. Results showed generally strong agreements between different discrete sample methods, with average percent absolute error %δabs< 7% foraCDOMand < 9% forap. In situ approaches showed higher variability and reduced accuracy. Foranw, %δabsdeviation relative to PSICAM data was on average 12% to 20%. Results help identify remaining technological gaps and need for improvements in the different absorption measurement approaches.
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测量过滤器上收集的浮游植物吸收光谱时的伪影
影响因子：
4.5
作者：
D. Stramski
通讯作者：
D. Stramski
RAMSES 系列高光谱水下辐射计的浸没系数
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
G. Zibordi;M. Darecki
通讯作者：
M. Darecki
液体波导 CDOM 吸收测量的不确定性预算。
影响因子：
1.9
作者：
Ina Lefering;R. Röttgers;Christian Utschig;D. McKee
通讯作者：
D. McKee
影响因子：
2.9
作者：
Ferrari, GM;Tassan, S
通讯作者：
Tassan, S
影响因子：
2.4
作者：
Mekaoui, S.;Zibordi, G.
通讯作者：
Zibordi, G.