Multisensor monitoring of plume dynamics in the northwestern Mediterranean Sea
We used data from various space-borne sensors to monitor the marine ecosystem in the northwestern Mediterranean Sea, at the Costa Dorada, between the City of Barcelona and the estuary of the river Ebro. The aim of this study was to demonstrate that the combination of different remote sensing data (acquired at different electromagnetic frequencies) allows for an improved monitoring system, in particular for a better monitoring of the marine ecosystem and, hence, a better coastal zone management. We present remote sensing data acquired by the Synthetic Aperture Radar (SAR) and the Along-Track Scanning Radiometer (ATSR) aboard the Second European Remote Sensing Satellite (ERS-2), and by the Sea-viewing Wide Field-of-view Sensor (Sea WiFS) on the SeaStar satellite. By combining the different data we are able to overcome specific drawbacks of the single sensors, like an insufficient temporal coverage, or a strong dependence on weather and daylight conditions.
Within the study area two main features have been selected as examples, which are well visible on many of the analysed images. The first one exhibits a higher load of chlorophyll-a and surface-active compounds and a lower sea surface temperature (SST), which is likely to be caused by the plume of the river Llobregat, southwest of Barcelona. It can clearly be seen from the imagery how the river plume is driven along the coast by the local currents. The second feature can be related to cooling water being released from a nuclear power plant and causing turbulence in the water body, which in turn gives rise to signatures visible on the ERS-SAR imagery.
KeywordsEbro Imgery Llobegat river
Along-Track Scanning Radiometer
Advanced Very High Resolution Radiometer
Coastal Zone Colour Scanner
European Remote Sensing Satellite
Synthetic Aperture Radar
Sea-Viewing Wide Field-of-View Sensor
Sea surface temperature
Unable to display preview. Download preview PDF.
- Jolly, G.W., Mangin, A., Cauneau, F., Calatuyud, M., Barale, V., Snaith, H.M., Rud, O., Ishii, M., Gade, M., Redondo, J.M. & Platonov, A. 1999.Clean Seas final report. Publ. Satellite Observing Systems, Godalming, UK.Google Scholar
- Kahru, M., Horstmann, U. & Rud, O. 1994. Increased cyoanobacterial blooming in the Baltic Sea detected by satellites: natural fluctuation or ecosystem change?Ambio 23: 469–472.Google Scholar
- Robinson, I.S. 1994.Satellite oceanography: An introduction for oceanographers and remote-sensing scientists Wiley, New York, NY, US.Google Scholar
- Rud, O. & Gade, M. 2000.Using multi-sensor data for algae bloom monitoring. In: Proceedings of the International Geoscience Remote Sensing Symposium (IGARSS) 2000, pp. 1714–1716. Honolulu, HI, US.Google Scholar