1. Research Centre for Toxic Compounds in the Environment, RECETOX, Kamenice 5, 625 00 Brno, Czech Republic
2. Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, 8092 Zürich, Switzerland
3. Czech Hydrometeorological Institute − Košetice Observatory, 394 22 Košetice, Czech Republic