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The information system of the Alpine Lakes Observatory (SI-OLA) provides a large amount of raw data on Lake Geneva, from the INRA CARRTEL laboratory in Thonon-les-Bains in collaboration with the CIPEL.

Requests to obtain this data (free of charge) are made via registration on the SI-OLA website.

List of data available on the SI-OLA

Multi-parameter probe

  • Temperature corrected pH
  • Oxygen level at saturation corrected by winkler
  • Turbidity
  • Polycyclic Aromatic Hydrocarbon
  • Brightness in the water
  • Phycocyanin
  • Percentage of oxygen at saturation
  • Raw pH
  • Light transmission
  • Conductivity at 25 °C
  • Brightness in the air
  • Chlorophyll a
  • Oxygen in mg
  • Temperature
  • Oxygen in mg corrected by winkler

Primary production

  • Primary production per hour
  • Primary production by actual incubation time
  • Primary production by median third

Phytoplankton

  • Number of cells per ml
  • Number of fields counted
  • Biovolume of the species in the sample
  • Number of objects counted
  • Number of objects per ml

Zooplankton

  • Number of individuals

Chlorophyll

  • Chlorophyll c
  • Carotenoid
  • Chlorophyll a scor-unesco
  • Pheopigments
  • Chlorophyll a strickland-parsons

Physical chemistry

  • Gross conductivity
  • Chlorides
  • Temperature
  • Dissolved oxygen
  • Sodium
  • Suspended matter
  • Complete alkalinity
  • Nitric nitrogen
  • Nitrous nitrogen
  • Particulate organic carbon
  • Calcium
  • pH
  • Ammoniacal nitrogen
  • Total organic carbon
  • Dissolved organic carbon
  • Particulate organic nitrogen
  • Total phosphorus
  • Ortho phosphorus
  • Total nitrogen
  • Total filtered phosphorus
  • Particulate phosphorus
  • Potassium
  • Sulphates
  • Reactive silica
  • Magnesium

Collection conditions

  • Appearance of the water
  • Wind speed
  • Assessment of time
  • Air temperature
  • Transparency with INRA disc
  • Colour of the water
  • Wind direction
  • Sunshine
  • Atmospheric pressure on ship
  • Cloudiness
  • Water surface condition
  • Transparency with Secchi disk
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