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Methods to retrieve the complex refractive index of aquatic suspended particles: going beyond simple shapes

AuthorsSánchez, Albert-Miquel ; Piera, Jaume
Issue DateJul-2016
PublisherEuropean Geosciences Union
CitationBiogeosciences 13: 4081-4098 (2016)
AbstractThe scattering properties of aquatic suspended particles have many optical applications. Several data inversion methods have been proposed to estimate important features of particles, such as their size distribution or their refractive index. Most of the proposed methods are based on the Lorenz–Mie theory to solve Maxwell's equations, where particles are considered homogeneous spheres. A generalization that allows consideration of more complex-shaped particles is the T-matrix method. Although this approach imposes some geometrical restrictions (particles must be rotationally symmetrical) it is applicable to many life forms of phytoplankton. In this paper, three different scenarios are considered in order to compare the performance of several inversion methods for retrieving refractive indices. The error associated with each method is discussed and analyzed. The results suggest that inverse methods using the T-matrix approach are useful to accurately retrieve the refractive indices of particles with complex shapes, such as for many phytoplankton organisms
Description18 pages, 19 figures, 2 tables
Publisher version (URL)http://dx.doi.org/10.5194/bg-13-4081-2016
Identifiersdoi: 10.5194/bg-13-4081-2016
issn: 1726-4170
e-issn: 1726-4189
Appears in Collections:(ICM) Artículos
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