@Article{IgorMiNaAlKaSt:2016:ReQuAl,
author = "Igor, Ogashawara and Mishra, Deepak R. and Nascimento, Renata F.
F. and Alc{\^a}ntara, Enner H. and Kampel, Milton and Stech,
Jos{\'e} Luiz",
affiliation = "{Indiana University} and {University of Georgia} and Geopixel and
{Universidade de S{\~a}o Paulo (USP)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Re-parameterization of a quasi-analytical algorithm for colored
dissolved organic matter dominant inland waters",
journal = "International Journal of Applied Earth Observation and
Geoinformation",
year = "2016",
volume = "53",
pages = "128--145",
month = "Dec.",
keywords = "Bio-optical model, Colored dissolved organic matter, Inland
waters, Quasi-analytical algorithm, Inherent optical properties,
Absorption coefficient of phytoplankton, Remote sensing
reflectance.",
abstract = "Quasi-Analytical Algorithms (QAAs) are based on radiative transfer
equations and have been used to derive inherent optical properties
(IOPs) from the above surface remote sensing reflectance (R-rs) in
aquatic systems in which phytoplankton is the dominant optically
active constituents (OACs). However, Colored Dissolved Organic
Matter (CDOM) and Non Algal Particles (NAP) can also be dominant
OACs in water bodies and till now a QAA has not been parametrized
for these aquatic systems. In this study, we compared the
performance of three widely used QAAs in two CDOM dominated
aquatic systems which were unsuccessful in retrieving the spectral
shape of IOPS and produced minimum errors of 350% for the total
absorption coefficient (a), 39% for colored dissolved matter
absorption coefficient (a(CDM)) and 7566.33% for phytoplankton
absorption coefficient (a(phy)). We re-parameterized a QAA for
CDOM dominated (hereafter QAA(CDOM)) waters which was able to not
only achieve the spectral shape of the OACs absorption
coefficients but also brought the error magnitude to a reasonable
level. The average errors found for the 400-750nm range were 30.71
and 14.51 for a, 14.89 and 8.95 for a(CDM) and 25.90 and 29.76 for
a(phy) in Funil and Itumbiara Reservoirs, Brazil respectively.
Although QAA(CDOM) showed significant promise for retrieving IOPs
in CDOM dominated waters, results indicated further tuning is
needed in the estimation of a(lambda) and a(phy)(lambda).
Successful retrieval of the absorption coefficients by QAA(CDOM)
would be very useful in monitoring the spatio-temporal variability
of IOPS in CDOM dominated waters.",
doi = "10.1016/j.jag.2016.09.001",
url = "http://dx.doi.org/10.1016/j.jag.2016.09.001",
issn = "0303-2434",
language = "en",
targetfile = "ogashawara_re.pdf",
urlaccessdate = "07 maio 2024"
}