LEXPLORE PLATFORM

LéXPLORE Letters No. 33

This newsletter was generated on the 21-11-2023.

The figures below are showing data for the period 31-10-2023 to 14-11-2023.

Until today, Thetis sampled 3987 depth profiles on Lake Geneva. In this Newsletter we show 27 profiles, so just 0.68% of the recorded data. The complete data set is available at Datalakes.

Data highlights of this issue

Our Thetis is back online with most of the variables, so let us have a look at current output.

We can see that the lake is slowly cooling down but that there is still a lot of energy stored in the deeper layers, where we find positive anomalies up to +3 Kelvin.

This beginning of November was defined by cloudy, windy and rainy weather, which led to a very non-diurnal air temperature profile and waves up to 1 Meter on November 5th. This wavy episode also mixed the water column, visible in the temperature, oxygen and salinity profiles around November 5th. Salinity in general is very low due to the high precipitation input and low evaporation rate.

What is displayed

Data from the Thetis profiler:

  • Water Temperature in °Celsius

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

  • Dissolved Oxygen mg/L

  • Oxygen Saturation in %

  • Salinity mg/L

Data from the automatic weather station:

  • Air Temperature in °Celsius

  • Wind Speed in m/s

  • Precipitation in mm

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 2023: LéXPLORE Letters, 33, https://lexplore.info/wp-content/uploads/2023/11/lexplore-letters-2023-11-21.html