Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 4, pp. 346-350
A study of the bio-optical properties of the Kara Sea using satellite data and shipboard measurements
D.I. Glukhovets
1,2 , Yu.A. Goldin
1 1 P.P. Shirshov Institute of Oceanology RAS, Moscow 117997, Russia
2 Moscow Institute of Physics and Technology (State University), Dolgoprudny 141700, Russia
The goal of this paper is to compare satellite (MODIS) and shipboard measurements acquired during the 125-th R/V Professor Shtokman scientific expedition (August-September 2013) in the Kara Sea. We have performed a validation of the standard and regional algorithms in order to estimate the chlorophyll-A concentration. Comparison of the algorithm results with the ship measurements shows a significant discrepancy to the standard MODIS algorithm. The results of the regional algorithm show a better match to the ship measurements. We have also analyzed the error bar of the regional algorithm depending on the colored DOM fluorescence intensity. A strong similarity between the registered front positions detected by the satellite and ship data was revealed. A strong anticorrelation between salinity and fluorescence intensity of the colored DOM in desalinated water took place, therefore the colored DOM fluorescence intensity served as an effective indicator of the river flow influence on the surface layer. The satellite data were demonstrated to significantly contribute to the study of mesoscale dynamic processes. The satellite data of ASCAT scatterometer were converted into near-water wind vector maps using Matlab. This work proves the advantages of joint satellite and shipboard data analysis.
Keywords: validation of the satellite algorithms, bio-optical properties, fluorescent measurements, chlorophyll-A, DOM, near-water wind, river flow dynamics.
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