LéXPLORE Letters No. 30
This newsletter was generated on the 10-10-2023.
The figures below are showing data for the period 19-09-2023 to 03-10-2023.
Until today, Thetis sampled 3896 depth profiles on Lake Geneva. In this Newsletter we show 27 profiles, so just 0.69% 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 end of September represent what was happening in the atmosphere over Switzerland the whole month: It was much too warm!
In fact, September 2023 over Europe was the warmest ever measured. A result of that are the very positive water temperature anomalies displayed, up to 3 Kelvin at 30 meters depth after the mixing event on September 22nd. But even temperature anomalies at the surface scratch the 2 Kelvin mark, and that after incorporating the very warm 2022 into our daily climatology. So September 2023 surface layer waters are substantially warmer than in 2022.
The storm event around September 22nd also brought with it a lot of runoff and precipitation, reducing the salinity values of the water column and, as discussed above, mixed the water column due to wind and wave activity.
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
License
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Creative Commons
Attribution-NonCommercial-ShareAlike 4.0 International
License.