@Article{SoutoDiaCamSteKam:2017:NeDeRe,
author = "Souto, Roberto P. and Dias, Pedro L. Silva and Campos Velho,
Haroldo Fraga de and Stephany, Stephan and Kampel, Milton",
affiliation = "{Laborat{\'o}rio Nacional de Computa{\c{c}}{\~a}o
Cient{\'{\i}}fica (LNCC)} and {Laborat{\'o}rio Nacional de
Computa{\c{c}}{\~a}o Cient{\'{\i}}fica (LNCC)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "New developments on reconstruction of high resolution
chlorophyll-a vertical profiles",
journal = "Computational and Applied Mathematics",
year = "2017",
volume = "36",
number = "3",
pages = "1195--1204",
month = "Sept.",
keywords = "Radiative transfer equation · Ant colony system ·
Levenberg-Marquardt · Hydrologic optics · Chlorophyll-a profile.",
abstract = "We present a methodology to vertical profiles of chlorophyll-a
pigment concentration in open-ocean waters based on radiance
values at different depths. The inverse problem is formulated here
as an optimization problem and iteratively solved by an Ant Colony
System (ACS) meta-heuristic. An objective function is given by the
square difference between computed and experimental radiances at
each iteration. The Laplace transform discrete ordinate (LTSN)
method is used to solve the radiative transfer equation (direct
problem) in order to compute the radiances. In a first approach,
this methodology did not allow the reconstruction of profiles with
two or more peaks of chlorophyll-a concentration. This limitation
can be partially explained by the relatively low number (11) of
sampling points at different depths, which limits the spatial
resolution of the vertical profile to be reconstructed.
Alternatively, we propose the such reconstruction of the profile
by increasing the vertical resolution, in order to evaluate the
ability of identifying any peak in the chlorophyll-a
concentration. A hybrid methodology is adopted: initially, the
original inverse ACS methodology is employed to retrieve high
resolution profiles (41 and 81 points), and then these results are
used as an initial guesses for the Lavenberg-Marquardt
deteriministic optimization method in order to refine the vertical
profiles.",
doi = "10.1007/s40314-016-0318-8",
url = "http://dx.doi.org/10.1007/s40314-016-0318-8",
issn = "2238-3603",
language = "en",
targetfile = "souto_new.pdf",
urlaccessdate = "27 abr. 2024"
}