LEXPLORE PLATFORM

LéXPLORE Letters No. 57

This newsletter was generated on the 22-10-2024.

The figures below are showing data for the period 01-10-2024 to 15-10-2024.

Until today, Thetis sampled 4705 depth profiles on Lake Geneva. In this Newsletter we show 11 profiles, so just 0.23% of the recorded data. The complete data set is available at Datalakes.

Data highlights of this issue

Thetis is still under heavy maintenance, but the few days of Thetis data we managed to record still show us a prominent feature of this autumn: The water temperature at the lake´s surface is still substantially, up to -2.3 Kelvin, colder than in previous years. We see that some of the heat energy might have been shuffled to lower lake layers, visible in the positive temperature anomalies between 20 to 50 meters depth.

The relatively mild night air temperatures towards the middle of October might help reduce the very negative surface water temperature anomalies. We will keep an eye on this anomaly pattern throughout the next issues of this data newsletter.

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 %

  • Chlorophyll A in μg/L

  • Chlorophyll A Anomaly on daily resolution with respect to to the available daily climatology from Thetis so far in μg/L

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

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 2024: LéXPLORE Letters, 57, https://lexplore.info/wp-content/uploads/2024/10/lexplore-letters-2024-10-22.html