Open water evaporation of Lake IJssel, data used in the study 'Evaporation from a large lowland reservoir – observed dynamics during a warm summer'.

Time series of open water evaporation of Lake IJssel, the Netherlands, during the years 2019 and 2020 at two locations at the border of the lake: Stavoren and Trintelhaven. Data was collected using the eddy covariance instrument of the type IRGASON at a sampling frequency of 20Hz. Data was processed using EddyPro software for a 30-min averaging interval. The measurement height was 7.5 m and 10.8 m in Stavoren and Trintelhaven, respectively. Variables Tair and RH were collected using a separate HMP155A instrument at a height of 7.4 m and 10.9 m above surface in Stavoren and Trintelhaven, respectively. This data belongs to the study 'Evaporation from a large lowland reservoir – observed dynamics during a warm summer'.