Qing, S., Zhang, J., Cui, T. et al. Remote sensing retrieval of total absorption coefficient in the Bohai Sea., Chin. J. Ocean. Limnol. 30, 806–813 (2012). https://doi.org/10.1007/s00343-012-1238-0
DOI:
Qing, S., Zhang, J., Cui, T. et al. Remote sensing retrieval of total absorption coefficient in the Bohai Sea., Chin. J. Ocean. Limnol. 30, 806–813 (2012). https://doi.org/10.1007/s00343-012-1238-0DOI:
Remote sensing retrieval of total absorption coefficient in the Bohai Sea
摘要
Abstract
Temporal and spatial patterns of inherent optical properties in the Bohai Sea are very complex. In this paper
we used 77 groups of field data of AOPs (apparent optical properties) and IOPs (inherent optical properties) collected in June
August
and September of 2005 in the Bohai Sea
to retrieve the spectral total absorption coefficient a(λ) with the quasi-analytical algorithm (QAA). For QAA implementation
different bands in the region 680–730 nm (in 5 nm intervals) were selected and compared
to determine the optimal band domain of the reference wavelength. On this basis
we proposed a new algorithm (QAA-Com)
a combination of QAA-685 and QAA-715
according to turbidity characterized by a(440). The percentage difference of model retrievals in the visible domain was between 4.5%–45.1%
in average of 18.8% for a(λ). The QAA model was then applied to Medium Resolution Imaging Spectrometer (MERIS) radiometric products
which were temporally and spatially matched with in-situ optical measurements. Differences between MERIS retrievals and in-situ values were in the range 9.2%–27.8% for a(λ) in the visible domain. Major errors in satellite retrieval are attributable to uncertainties of QAA model parameters and in-situ measurements
as well as imperfect atmospheric correction of MERIS data by the European Space Agency (ESA). During a storm surge in April 2009
time series of MERIS images together with the QAA model were used to analyze spatial and temporal variability of the total absorption coefficient pattern in the Bohai Sea. It is necessary to collect more independent field data to improve this algorithm.
关键词
Keywords
references
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