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Temporal Monitoring for Sea Surface Temperature and Chlorophyll a by Analyzing Remote Sensing Images over the Caspian Sea
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Hamed Adab   , Azadeh Atabati , Abolghasem Amir ahamadi , Reza Esmaili |
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Abstract: (7173 Views) |
| Sea surface temperature is considered as an important climatic index and Chlorophyll a concentration is regarded as an essential factor for sea phytoplankton biomass and productivity for marine ecosystem. Caspian Sea is known as one of the best marine ecosystem in the Earth. In order to assessment of problems and threats of Caspian Sea, it is necessary to monitor sea surface temperature and Chlorophyll a. This study attempted to investigate time series of sea surface temperature and Chlorophyll a in monthly and seasonal scales and analysis the temporal correlation of sea surface temperature with Chlorophyll a. Hence, MODIS images of Terra and Aqua satellite were gathered from January 2003 to December 2009 over Caspian Sea. After doing of image preprocessing, the algorithms of sea surface temperature and Chlorophyll a were performed on the images. And then, monthly time series of sea surface temperature and Chlorophyll a were done. The result of seasonal Man-Kendall showed that there is a rising trend in amount of Chlorophyll a concentration and a lack of trend in sea surface temperature. In addition, the monthly and the seasonal pattern of Chlorophyll a are based on sea surface temperature. This is a significant change in Chlorophyll a concentration based on Pettitt's test in mid-2006. The results of this study indicate that there is a positive correlation between Chlorophyll a and sea surface temperature in the period of study. So that, 65% of Chlorophyll a concentration is justified as a dependent variable with sea surface temperature by using linear regression model. Also, Fisher’s F test confirms this significance of relationship. |
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| Keywords: Sea Surface Temperature, Chlorophyll a, Remote sensing, Caspian Sea |
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Full-Text [PDF 440 kb]
(1864 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2014/01/31 | Accepted: 2014/01/31 | Published: 2014/01/31
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