LEXPLORE PLATFORM

LéXPLORE Letters No. 45

This newsletter was generated on the 07-05-2024.

The figures below are showing data for the period 16-04-2024 to 30-04-2024.

Until today, Thetis sampled 4266 depth profiles on Lake Geneva. In this Newsletter we show 18 profiles, so just 0.42% of the recorded data. The complete data set is available at Datalakes.

Data highlights of this issue

Even though we have some data gaps in this two week period, we can identify the very cold end of April, which leaves the upper water column with negative temperature anomalies up to -2 Kelvin going into May.

The low air temperatures together with a continuously substantial wind and rain forcing results in lower than average Chlorophyll A for the end of April period. Even the increase of absolute Chlorophyll A values around April 30th is not enough to switch the sign of Chlorophyll A anomalies.

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, 45, https://lexplore.info/wp-content/uploads/2024/05/lexplore-letters-2024-05-07.html