Lake temperature data from a high-frequency monitoring of Lake Murten, Switzerland, 2022-2025

In 2021, the Swiss Federal Office for the Environment (FOEN) tasked Eawag to deploy temperature monitoring stations in several lakes in view of a Swiss-wide temperature monitoring network. The monitoring station in Lake Murten (Canton Fribourg) was introduced in July 2022 and it was operated until the end of 2024 by FOEN (financing) and Eawag (operation and maintenance). The measurement station consists of databuoy combined with a thermistor chain from RBR (Canada) with higher vertical resolution close to the surface. At the end of 2024, the measurement station was transferred from FOEN to Canton Fribourg. Since January 2025, the measurement station is operated jointly by Canton Fribourg (financing), FOEN (financial contribution to data processing and server infrastructure) and Eawag (operation and maintenance).