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http://hdl.handle.net/10362/9205| Título: | Extracting temporal and spatial distributions information about marine mucilage phenomenon based on Modis satellite images; a case study of the Tyrrhenian and the Adriatic Sea, 2010-2012 |
| Autor: | Gigliotti, Angelo |
| Orientador: | Caetano, Mário Sílvio Rochinha de Andrade Painho, Marco Octávio Trindade Pla Bañón, Filiberto |
| Palavras-chave: | Remote Sensing Oceanography Marine Pollution MODIS Sea Surface Temperature Mucilage Bloom Mediterranean Sea Italy |
| Data de Defesa: | 28-Fev-2013 |
| Relatório da Série N.º: | Master of Science in Geospatial Technologies;TGEO0095 |
| Resumo: | A novel approach was used with data from the Moderate Resolution Imaging Spectroradiometer (MODIS) to detect Marine Mucilage in tow different marine areas of the Italy (Campanian Seas and North Adriatic Sea) from 2010 to 2012. The approach involves first deriving a Mucilage Index (MI) based on the medium‐resolution (500 m) MODIS reflectance data correction of the ozone/gaseous absorption and Rayleigh scattering effects and then objectively determining the MI threshold value (0.05<MI<0.45) to separate the Marine Mucilage from other interference. The dynamic feature of time and space can be obtained for the two areas of study using extracted method. Variation of mucilage bloom in these areas is analyzed and discussed in different temporal scale. The mucilage bloom frequency index (MFI) is important criterion which can show the interannual and inter-monthly variation in the whole areas of Campanian Sea and North Adriatic Sea. Utilizing the MFI from 2010 to 2012, it found some phenomena that: thare is an increase of Mucilage formation in the last tree years in the Campanian seas, al contrario in veneto e’ stata evidenziata una diminuzione. Month algae bloom variation of MFI reflect the existing similar cicling dynamics of formation for each year. Lower values there are in the months of June and September, while the peaks occur in the hottest and less rainy months of July and August. We can clearly see that there are three different stages: operation of low level, rising phase, and fall period. We noted that there is a stronge influence of sea temperature in Mucilage formation. Series of consistent MODIS MI data products provide baseline information to monitor Italian coast Mucilage Formation, one of the critical water quality indicators, especially in the summer on a weekly basis, as well as to evaluate its future water quality trends. |
| Descrição: | Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies. |
| URI: | http://hdl.handle.net/10362/9205 |
| Aparece nas colecções: | NIMS - MSc Dissertations Geospatial Technologies (Erasmus-Mundus) |
Ficheiros deste registo:
| Ficheiro | Descrição | Tamanho | Formato | |
|---|---|---|---|---|
| TGEO0095.pdf | 5,86 MB | Adobe PDF | Ver/Abrir |
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