Basic Products

 

1. Chlorophyll –a (Chl-a)

Significance

  • Essential pigment in phytoplankton;

  • Used as a proxy for algal biomass;
  • Monitoring of trophic status, eutrophication, food availability for shellfish

 

Spatial/temporal resolution

  • 300m (daily)

  • 10m (5 days)

 

Limitations 

  • Quality of retrieval depends on sensor characteristics, can be impacted by high sediment or CDOM concentrations;

  • In shallow waters, bottom visibility can interfere with the signal.

 

FP7 CoBiOS project (GA 263295)

 

2. Total suspended matter (TSM)

Significance

  • Determines the light climate in the water;

  • Insight into coastal dynamics (erosion, accretion) and anthropogenic impacts (e.g. dredging)

 

Spatial/temporal resolution

  • 300m (daily)

  • 10m (5 days)

  • high resolution (variable)

 

Limitations 

  • Regional variability of sediment characterisiccs may require algorithm calibration;

  • In shallow waters, bottom visibility can interfere with the signal.

* RVO/NSO HBOTE project

 

3. Turbidity (Tur)

Significance

  • Determines the light climate in the water;

  • Insight into coastal dynamics (erosion, accretion) and anthropogenic impacts (e.g. dredging).

 

Spatial/temporal resolution

  • 300m (daily)

  • 10m (5 days)

  • high resolution (variable)

 

Limitations 

  • Regional variability of sediment characteristics may require algorithm calibration;

  • In shallow waters, bottom visibility can interfere with the signal.

RVO/NSO HBOTE project

4. Phycocyanin (PC)

Significance

  • Essential pigment in cyanobacteria;

  • Cyanobacteria can be harmful/nuisance species and indicators of eutrophication

 

Spatial/temporal resolution

  • 300m (daily)

 

Limitations 

  • In shallow waters, bottom visibility can interfere with the signal.

Chawira, M. (2012): Monitoring blue-green algae in the Ijsselmeer using remote sensing and in-situ measurements. Unpublished MSc Thesis at the Faculty of Geo-Information Science and Earth Observation of the University of Twente.

 

5. Coloured dissolved organic matter (CDOM)

Significance

  • CDOM has a limiting effect on photosynthesis and can inhibit the growth of phytoplankton populations, which form the basis of oceanic food chains and are a primary source of atmospheric oxygen.

 

Spatial/temporal resolution

  • 300m (daily)

 

Limitations 

  • In shallow waters, bottom visibility can interfere with the signal. 

ESA/Worldbank EOworld Zambezi River Basin project 

 

6. Sea Surface Temperature (SST)

Significance

  • Important factor for all aquatic life, for weather and climate studies.

 

Spatial/temporal resolution

  • 300m (daily)

  • 100m (16 days)

 

Limitations 

  • EO can only retrieve skin temperature.

*RVO/NSO HBOTE project