A simple two-band semi-analytical model for retrieval of specific absorption coefficients in coastal waters |
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| Institution: | 1. School of Ocean Sciences, China University of Geosciences, Beijing 100083, China;2. Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Qingdao Institute of Marine Geology, Qingdao 266071, China;3. First Institute of Oceanography, State Oceanic Administration, Qingdao 266071, China;4. School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210000, China;1. Institute of Geophysics, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany;2. Leibniz Institute of Astrophysics Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany;1. Laboratoire de Constructions Hydrauliques (LCH), School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland;2. e-dric.ch, Switzerland;3. Centre de recherche sur l’environnement alpin (CREALP), Switzerland |
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| Abstract: | A non-linear iterative method is used to replace the traditional spectral slope technique in initializing the total absorption decomposition model. Based on comparison of absorption coefficient by QAA and two-band semi-analytical model (TSAA) models with field measurements collected from the West Florida Shelf waters and Bohai Sea, it is shown that both models are effective in estimating absorption coefficients from the West Florida Shelf waters, but the TSAA model is superior to the QAA model. Use of the TSAA model in estimating absorption coefficient in the West Florida Shelf and Bohai Sea decreases the uncertainty of estimation by 1.3–74.7% from the QAA model. The TSAA model’s sensitivity to the input parameters was evaluated by varying one parameter and keeping the others fixed at their default values. Our results indicate that the TSAA model has quite a strong noise tolerance to addressing the field data of the total absorption coefficient. |
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| Keywords: | Remote sensing Absorption coefficient Semi-analytical model Spectral slope technique Bohai Sea West Florida Shelf |
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