Spatiotemporal temperature and chlorophyll-a mapping and modeling in the Gulf of Corinth using Landsat satellite imagery
The effluent from a vertically integrated alumina and aluminum production and (since the late 2000s) thermal electric power production plant located on Antikyra bay in the Gulf of Corinth is being examined. This study processes satellite sea surface temperature and chlorophyll-a data and examines th...
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| Κύριοι συγγραφείς: | , |
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| Άλλοι συγγραφείς: | |
| Γλώσσα: | en_US |
| Δημοσίευση: |
2019
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| Θέματα: | |
| Διαθέσιμο Online: | http://hdl.handle.net/11610/18864 |
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| Περίληψη: | The effluent from a vertically integrated alumina and aluminum production and (since the late 2000s) thermal electric power production plant located on Antikyra bay in the Gulf of Corinth is being examined. This study processes satellite sea surface temperature and chlorophyll-a data and examines the possibility of thermal pollution from the aluminum processing plant considering the local geomorphology. The sea surface temperatures were derived from 58 Landsat 5 and 7 images from July 2009 until December 2016. Respectively, the Chl-a concentrations were retrieved using reflectance data of 6 Landsat OLI images from April 2014 until October 2015 in order to statistically correlate the various combinations of Landsat bands with in-situ measurements and to quantify algorithms that best describe this relationship and calculate accurately the concentration of chlorophyll-a. A polynomial model employing the band ratio B4/B1 was found to be the most efficient algorithm for the chlorophyll-a estimation of the Antikyra Bay with a maximum correlation coefficient of R2 = 0.99. Based on the correlation coefficients, the most sufficient local algorithm was found to be chl-a= 59.423x(b4/b1)2-22.687x(b4/b1)+2.174. The results confirmed the suitability of the method for assessing the concentration of chlorophyll-a in the Gulf of Corinth with statistically accuracy. Furthermore, the atmosphere influences on the sea surface temperature variation were indicated using air-sea heat flux data. |
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