Òscar Chic | CSIC (Consejo Superior de Investigaciones Científicas-Spanish National Research Council) (original) (raw)

Papers by Òscar Chic

Proceedings of SPIE, Dec 11, 1998

A coupling of field and satellite remote sensing data were used to improve the knowledge with res... more A coupling of field and satellite remote sensing data were used to improve the knowledge with respect to coastal dynamics and erosion process as well as on the importance of mangroves as a mechanism of fertilization of tropical NE-Brazilian waters. RADARSAT and ERS SAR images were used to position morphologic features, to trace coastline evolution and detect changes in mangrove coverage. Analysis of aerial photography, ERS and RADARSAT images, reveal that mangrove areas have been drastically reduced in the last decades, to give places to new urban settling. Coastal erosion appears to have been intensified after the installation of harbor facilities and by the construction of beach houses and other structures along the shore, that modify coastal circulation and nearshore sediment transport. Particular importance is given to the analysis of the RADARSAT SAR image taken in September 1997.

3 pagesTechnology offers easy-to-use satellite data, allowing manipulation and enhancement of the... more 3 pagesTechnology offers easy-to-use satellite data, allowing manipulation and enhancement of the images. There are basically two sorts of remote sensing data users. One kind is mainly interested in doing qualitative studies, so it is enough for them to be able to browse images from data repositories and download the imagery. A high-resolution picture transmission (HRPT) receiving station has been operational at the Institut de Ciències del Mar since 2001, allowing users to acquire data from several satellites. The system is composed of a receiving subsystem, a computer subsystem of control and data archiving, and a processing and publishing subsystem. The receiving subsystem consists of a 2.4-meter-diameter antenna, a universal receiver for polar satellites and a tracking antenna system. Maps of average temperatures are obtained using the maximum pixel value algorithm, and visible and near-infrared raw radiance counts are collected and converted to geophysical parametersPeer Reviewe

VII Jornadas Españolas de Ingeniería de Costas y Puertos, 22-23 May de 2003, AlmeríaPeer reviewe

The Crustacean Society Summer Meeting (TCSSM) - 10th Colloquium Crustacea Decapoda Mediterranea (... more The Crustacean Society Summer Meeting (TCSSM) - 10th Colloquium Crustacea Decapoda Mediterranea (CCDM), 3-7 June 2012, Athens, Greece

Dalt de tot de la Torre Mapfre, de Barcelona, hi ha 5 càmeres que formen part del sistema Argus. ... more Dalt de tot de la Torre Mapfre, de Barcelona, hi ha 5 càmeres que formen part del sistema Argus. La seva finalitat és mirar el mar i convertir cada píxel de les imatges fotogràfiques, en un instrument de mesura. Els científics s'han adonat que la intensitat de radiació de cada un dels píxels és indicativa de diferents paràmetres físics, com la profunditat, els corrents o l'alçada de les onadesPeer reviewe

41e Congres de la Commission Internationale pour l’Exploration Scientifique de la Mer Méditerrané... more 41e Congres de la Commission Internationale pour l’Exploration Scientifique de la Mer Méditerranée (CIESM), 12-16 September 2016, Kiel.-- 1 page, 1 figureAlong-track altimetric measurements of Sea Surface Heights (SSH) are very well suited to quantify across -track currents. However, the spatial resolution of derived 2D velocities is restricted to scales above 100 -150 km and the limited number of altimeters can lead to errors in the location of currents. On the contrary, infrared measurements of Sea Surface Temperature (SST) are well suited to locate flow patterns but it is difficult to extract quantitative estimations of ocean currents.To overcome the previous constrains we have developed a methodology able to provide enhanced 2D surface currents. Our approach opens the door to retrieve the velocity field associated to structures smaller than 30 km, not accessible through the standard SSH maps. Results are compared with drifting buoy trajectories showing good agreementPeer Reviewe

VII International Symposium on Marine Sciences - ISMS 2020, Jul 1, 2020

med 2018, 11-12 December 2018, Frascati, Rome, ItalyIn addition to their ecological and environme... more med 2018, 11-12 December 2018, Frascati, Rome, ItalyIn addition to their ecological and environmental value, coastal areas are of major economic and social importance. Therefore, they are one of the marine environments most affected by anthropogenic pressures, in the form of high population densities and intense human activities. Anthropogenic pressures produce an excess of nutrients which are delivered to coastal waters, triggering phytoplanktonic growth and the eutrophication process, thus decreasing water quality. Several policies have been enacted in Europe with the aim of restoring and protecting waters, such as the Water Framework Directive (WFD; 2000/60/EC) and the Marine Strategy Framework Directive (MSFD; 2000/60/EC). This aim involves combatting the negative effects of eutrophication, which necessitates the assessment of its impact through chlorophyll-a concentration. Until now, these assessments have been based mainly on field data. However, satellite data of the new generation high-resolution missions are now readily available, such as that of Sentinel-2 (10-60m) of the European Space Agency. Therefore, an opportunity is given to assimilate field and satellite data to model the structure and functioning of coastal waters. Our aim is to set up an operational system for monitoring the quality of coastal waters based on the synergy between satellite observations and in situ data. As a first step to achieve it, we present here a case study from the Catalan coast, which is representative of the NW Mediterranean coast. In this area, under the National Catalan Coastal Water Monitoring Program, chlorophyll-a concentration is sampled monthly or quarterly at 268 stations, located along 400km of coastline and at three distances from the shore (0, 1000 and 5000m). The objective of this study is to merge this field data with the same kind of data provided by Sentinel-2. Specifically, we are interested to check whether the data from these two sources 1) agree between them from 2015 to 2018, and 2) can be assimilated into a regional model. The main setbacks to be solved in this case study are related to the higher spatial variability of Mediterranean coastal waters compared with other coastal areas due to their specific characteristics. This variability is intensified near the coastline (<500m from the shore), where the chlorophyll algorithm should be adjusted for turbid and clear neighbouring areas and corrected for sea bottom interferences, especially sea grasses and macro algae. Results will allow us to 1) improve the scientific knowledge regarding the structure and functioning of the Catalan coastal zone, 2) provide an improved assessment of eutrophication for this area, and 3) suggest recommendations related to the zone¿s management. At the same time, the findings will be useful for fulfilling the requirements of the WFD, in relation with the Biological Quality Element Phytoplankton, and of the MSFD, in relation with the Descriptor 5 - Eutrophication. Therefore, these results will be very valuable for the involved administrations: the Catalan Water Agency, the Spanish Environmental Ministry and the European Commission. Future work will provide chlorophyll maps of the Catalan coast in an operational way and extend the procedure to provide full coverage of Mediterranean coastal watersPeer Reviewe

Instrumentation viewpoint, 2011

Fourth International Workshop on Marine Technology (MARTECH 2011), 22-23 September 2011, Cadiz.--... more Fourth International Workshop on Marine Technology (MARTECH 2011), 22-23 September 2011, Cadiz.-- 1 page

Curso en la Segunda Convocatoria del plan de formacion 2020 del Consejo Superior de Investigacion... more Curso en la Segunda Convocatoria del plan de formacion 2020 del Consejo Superior de Investigaciones Cientificas (CSIC) impartido del 9 al 11 de noviembre de 2020 en Barcelona y con una duracion de 25 horas

MAss Transfer and Ecosystem Response 3 (MATER-3) del Mediterranean Targeted Project II (MTP II), ... more MAss Transfer and Ecosystem Response 3 (MATER-3) del Mediterranean Targeted Project II (MTP II), inicialmente denominada ALGERS'98.-- Jefe de campanana Jordi Font.-- Codigos de campana HE049 y MTP II MATER/HESP-05-98 con inicio el 18 de mayo de 1998 en Cartagena y final el 27 de mayo de 1998 en Cartagena.-- 3 pages

5th International Otolith Symposium (IOS2014), 20-24 October 2014, Mallorca, Balearic Islands Spa... more 5th International Otolith Symposium (IOS2014), 20-24 October 2014, Mallorca, Balearic Islands Spain.-- 1 page

IEEE Oceanic Engineering Society. OCEANS'98. Conference Proceedings (Cat. No.98CH36259)

International Journal of Remote Sensing, 1996