Coastal observation systems
The need for observations
There are a series of objectives why we need to have observational data: to control the outcome of (governmental) monitoring programmes, the obtain data for modelling exercises and to enable scientific analyses of field data to improve our understanding of the marine environment, e.g. to enable assessments of the environmental quality and long term changes.
To observe our marine environment several options are nowadays available: FerryBoxes, Poles in shallow waters like the Wadden Sea, Gliders, regular ship cruises for vertical resolution of parameters, wave rider buoys, shore based radar like HF and XF, and remote sensing from satellites. A combination of different approaches enables coverage on different time and spatial scales. Several of these observational techniques will be presented through examples of actual measurements. Examples are taken from the COSYNA integrated observation system developed by HZG together with other German research institutes during the last years.
FerryBox
Transectional and stationary in situ observations
The FerryBox is an automated measuring system mounted on ‘ships of opportunity’ or on shore-based installations (see diagram of a FerryBox and picture of commercial available FB).
Parameters measured are a.o. water temperature, conductivity, turbidity, oxygen, pH, and chlorophyll-a-fluorescence. Water samples for further lab analysis are taken. On some routes measured additionally are: Algal classes and nutrients (ammonia, nitrite/nitrate, o-phosphate, silicate). In the near future sensors for pCO2, alkalinity, a flow-cytometer and an instrument to measure geneprobes to detect specific species can be installed in some FerryBoxes.