Bio-optical algorithms

The first part of the study addressed the selection and quality assurance of field measurements for deriving seawater inherent optical properties from reflectance data in optically complex coastal basins.

 

Reference field measurements were produced within the framework of the Bio-Optical Mapping of Marine Properties (BiOMaP) led by the Joint Research Centre (JRC), Ispra, Italy. During the second part of the study, operational MLP neural networks were implemented to derive Chlorophyll-a concentration, absorption of the yellow substance at 412 nm and concentration of the total suspended matter (Chl-a, ays(412) and TSM, respectively) from normalized remote sensing reflectance (RRS) on the basis of BiOMaP data. Specific investigations were executed for the Adriatic Sea, the Baltic Sea and the Black Sea.

 

Current work progresses focus on the extension of this the analysis to Oceanic water off Portugal.  Results have shown that it is possible to derive accurate products in optically complex sea waters through specific regional algorithms.


 Comparison of pigment index maps in the Altantic off Portugal.

 

 

 

 

 

 
Projects: 
Authors: 

Ana Brito

Ana Brito joined the Centre of Oceanography (FCUL) in January 2010 as Post-doc Fellow. Her PhD was awarded by the Edinburgh Napier University and her work was focused on the development of biogeochemical models. Currently, her research interests are related to the evaluation of the ecological quality of aquatic systems and the assessment of phytoplankton communities through remote sensing.

Carolina Sá

Carolina Sá joined the Centre of Oceanography in 2005 and her research interests are related to biological applications of ocean color satellite data. She has participated in several cruises off the Portuguese coast, collecting and analyzing phytoplankton in-situ measurements for the validation of bio-optical algorithms.

Tamito Kajiyama

Tamito Kajiyama joined the Geo-Info project of the Center of Informatics and Information Technology, New University of Lisbon, in April 2008. His current research interest focuses on the design and implementation of a high-performance computing (HPC) solutions for Monte Carlo ocean color simulation.

Vanda Brotas

Vanda Brotas is Full Professor in the Department of Biology in the Faculty of Sciences of the University of Lisbon. She was the Director of the Center of Oceanography between 2004 and 2006. Currently, her research is mainly focused on phytoplankton ecology and dynamics assessed through HPLC and remote sensing.

Partners: 

Center of Oceanography (CO)

The Centro de Oceanografia (CO) is a multidisciplinary research unit of the national R&D system, whose main host institution is the Faculty of Sciences of the University of Lisbon (FCUL), the other host institution of this Centre being the University of Évora (UE).

The main research lines of the Centro de Oceanografia are the following: 

Faculty of Science and Technology (FCT)

Faculdade de Ciências e Tecnologia (Faculty of Science and Technology; FCT) is one of the nine academic units of Universidade Nova de Lisboa (UNL). The FCT/UNL campus is located in Monte de Caparica and covers approximately 30 ha, with additional capacity expansion to 60 ha.  Founded in 1977, FCT/UNL is one of the most prestigious Portuguese public schools of science and engineering today, with a total enrolment of ca. 7500 students, of which nearly 1400 are postgraduate students (MSc and PhD).

Centre for Marine and Environmental Research (CIMA)

By nature, CIMA a multi­disciplinary unit that explores the connections between environments, processes and human populations using scientific methods coupled with state­of­the­art modelling techniques. Apart from research, CIMA places a strong emphasis on training and education, as well as providing consultation services, digital applications and scientific information to the scientific and public domains. CIMA activity is focused on 3 general aims: 1. scientific research; 2. training at Masters and PhD level and 3.