Characterization of Optical Attenuation by Colored Dissolved Organic Matter (CDOM) in the Red Sea
Type
PosterKAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionMarine Science Program
Red Sea Research Center (RSRC)
Date
2016-02Permanent link to this record
http://hdl.handle.net/10754/621913
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Optical properties of colored dissolved organic matter (CDOM) control the downward irradiance in the ultraviolet and visible range of the electromagnetic radiation. CDOM is a strong absorber in shorter wavelengths (ultraviolet light) with steeper spectral slopes in the open ocean. Despite the importance of CDOM in understanding physical and biogeochemical processes in the marine environment, in situ measurements of optical properties in the Red Sea are sparse. This study comprises CDOM absorption from two different instruments (i.e. a spectrophotometer and WET Labs ac-s sensor), and assesses the variations in optical properties of CDOM in the Red Sea using data collected in 2014 and 2015. Three global inversion algorithms (Garver-Siegel-Maritorena model - GSM, Quasi-Analytical Algorithm - QAA, and the Constrained Linear-Matrix inversion model - CLM) were applied to recent data collected in the Red Sea, providing the comparison at five key selected wavelengths (412, 443, 490, 510, and 555 nm) demonstrated that in situ aCDOM values were higher than the values predicted from the three inversion algorithms and leads to underestimating in situ measurements. This finding is consistent with the conclusion of Brewin et al. (2015) that overestimation of chlorophyll in the Red Sea could be due to excessive CDOM.Citation
Tiwari, S. P., Kürten, B., & Jones, B. H. (2016). Characterization of Optical Attenuation by Colored Dissolved Organic Matter (CDOM) in the Red Sea. Unpublished. https://doi.org/10.13140/RG.2.1.1270.4409Sponsors
This study is supported by King Abdullah University of Science and Technology (KAUST), Kingdom of Saudi Arabia.Conference/Event name
Ocean Sciences Meeting 2016Additional Links
https://www.researchgate.net/publication/296933705_Characterization_of_Optical_Attenuation_by_Colored_Dissolved_Organic_Matter_CDOM_in_the_Red_Seaae974a485f413a2113503eed53cd6c53
10.13140/RG.2.1.1270.4409
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