LEXPLORE PLATFORM

LéXPLORE Letters No. 5

This newsletter was generated on the 25-10-2022.

The figures below are showing data for the period 04-10-2022 to 18-10-2022.

Until today, Thetis sampled 3017 depth profiles on Lake Geneva. In this Newsletter we show 44 profiles, so just 1.46% of the recorded data. The complete data set is available at Datalakes.

Data highlights of this issue

After the storm comes the calm. Bringing back the Thetis data, we can see a quiet autumn atmosphere leaving the water column stable. Extremely high atmospheric temperatures for this time of the year leave their footprint in the water column of Lake Geneva. The upper layers of the lake are up to 2 Kelvin warmer than in previous years.

A little windy episode around the 15th of October shook up the top 15 meter of the water column, but cleary sky autumn weather with textbook daily air temperature amplitudes returned afterwards.

What is displayed

Data from the Thetis profiler:

  • Water Temperature in °Celsius

  • Water Temperature Anomaly on daily esolution with respect to to the available daily climatology from Thetis so far in Kelvin

  • Dissolved Oxygen mg/L

  • Oxygen Saturation in %

  • Chlorophyll A in μg/L

  • Backscattering of light 700 nm in 1.e-2 m-1, representing zooplankton or larger particles in the water

  • Salinity in mg/L

Data from the automatic weather station:

  • Air Temperature in °Celsius

  • Wind Speend in m/s

Data from the wave buoy:

  • Wave height in decimeter

Authorship and further information

This newsletter is created by EPFL, specifically Martin Wegmann.

For more information about LéXPLORE, contacting us and possibilities to visit the platform: lexplore.info

If you want to know more about the Chlorophyll distribution across Lake Geneva, have a look at the satellite data map by our colleagues at CIPEL.

If you want to know more about the water temperature distribution across Lake Geneva, have a look at the lake reanalysis and forecasts by our colleagues at EAWAG.

If you want to use figures from the LéXPLORE Letters, you can use the following citation:

EPFL, Limnology Center 2022: LéXPLORE Letters, 5, https://lexplore.info/wp-content/uploads/2022/10/lexplore-letters-2022-10-25.html