This newsletter was generated on the 22-03-2025.
The figures below are showing data for the period 05-02-2025 to 19-02-2025.
Until today, Thetis sampled 4906 depth profiles on Lake Geneva. In this Newsletter we show 28 profiles, so just 0.57% of the recorded data. The complete data set is available at Datalakes.
In today´s letter, we can see nicely how a small window of fair and mild weather at the beginning of February can impact the lake ecosystem.
The episode of mild weather started around February 10th and lasted for roughly three days, in which air temperature maxima reached 9 °Celsius. This in turn warmed up the water column from the top, with temperature anomalies of +0.2 Kelvin. Phytoplankton in the water started to use this energy influx to grow and in turn to produce oxygen. The chlorophyll A anomalies paint a clear picture of that event.
Shortly after, windy and cold conditions mixed and cooled down the lake again.
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:
This work is licensed under a
Creative Commons
Attribution-NonCommercial-ShareAlike 4.0 International
License.