LEXPLORE PLATFORM

LéXPLORE Letters No. 31

This newsletter was generated on the 27-10-2023.

The figures below are showing data for the period 03-10-2023 to 17-10-2023.

Until today, Thetis sampled 3896 depth profiles on Lake Geneva. In this Newsletter we show 7 profiles, so just 0.18% of the recorded data. The complete data set is available at Datalakes.

Data highlights of this issue

Unfortunately, the Thetis Chlorophyll A and backscattering sensors need heavy maintenance right now. That is why these variables are missing from todays issue. We added the salinity information for now, in order to show you some interesting content.

The surface water temperatures of Lake Geneva at the beginning of October represent what was happening in the atmosphere over Switzerland during all of September: It was much too warm! We see temperature anomalies for surface water layers of above 2 Kelvin with respect to previous years.

The fair atmospheric conditions only start changing in the middle of October, as we can see from the automatic weather station data. Unfortunately, lake condition data is missing for that period due to additional maintenance routines.

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, 31, https://lexplore.info/wp-content/uploads/2023/10/lexplore-letters-2023-10-27.html