Lake Page of EMU
Development of this webpage was supported by the EU through the European Regional Development Fund, programme "Research Internationalisation" project LIMNO (3.2.0601.11- 0001).
Please read before proceeding:
Attention! Raw data. The data is provided as it is automatically received from the sensors without quality control, warranty or condition of any nature. EMU does not warrant the quality, accuracy, or completeness of any information, data or product from these web pages.
If you want to use the data from this website or need a wider acess to the data, please contact Alo.Laas@emu.ee
Estonian lakes equipped with automated buoy systems are site members of the Global Lake Ecological Observatory Network. GLEON is a world-wide grassroots network of people, institutions, programs, and data dedicated to understanding, predicting, and communicating the impact of natural and anthropogenic influences on lakes.
Lake Võrtsjärv automatic weather station was established in late 2009 on the pier of the Centre for Limnology (N 58.211151, E 26.108136). The original station contaied Vaisala Weather Transmitter WXT520 and Star Pyranometer 8101. and the data collection was controlled with a Gealog SG Alphanumeric (V1.0) data logger.
At the end of 2018 the station was renovated. Current measurements are done by Airmar 200WX weather station and Star Pyranometer 8101 and the data collection is controlled by the Flydog Marine datalogger. Parameters collected at 5-minutes intervals include: air temperature, air pressure, humidity, wind speed and direction, and solar irradiance.
Lake Võrtsjärv Buoy was deployed in the summer of 2010 near the deepest point of the lake (N 58.211798, E 26.103163) to gather high resolution data on meteorology and water quality of the lake. YSI EMM 700 bay buoy has been used for float. YSI 6600 V2-4 multisonde (at 1 meter) and two Li-Cor (LI-192) underwater PAR sensors were fixed at 0.5 and 1 meter depth for underwater measurements. The buoy is equipped with a Vaisala Weather Transmitter WXT520 and a Li-Cor pyranometer (LI-200) for weather parameters. Data collection was controlled with Campbell CR1000 datalogger.
System was renewed in 2021. Current underwater measurements are collected with EXO2 multisond and data collection is controlled by Flydog Marine datalogger.
Collected parameters include: water temperature, dissolved oxygen saturation, chlorophyll fluorescence, phycocyanin fluorescence, pH, conductivity, turbidity, air temperature, air pressure, humidity, precipitation, wind speed and direction, and solar radiation. All parameters are collected at 10 minutes interval.
Lake Saadjärv profiling buoy was established in summer 2015 (N 58.295689, E 26.421284) to gather high resolution data on meteorology and water quality of the lake. Flydog Marine coastal profiler „Oscar“ collects underwater data with EXO2 multisonde form 2 to 20 meters depths.
Collected parameters include: water temperature, dissolved oxygen saturation, chlorophyll fluorescence, phycocyanin fluorescence, pH, conductivity, turbidity and fDOM data. All parameters are collected at 30 minutes interval.
Lake Saadjärv profiling buoy is also equipped with an Airmar 200WX weather station and a Li-Cor quantum sensor (LI-190SZ) for weather parameters. Measurements for air temperature, air pressure, humidity, wind speed and direction, and PAR are collected at 1 minutes interval.