1. Research and Development Dept., Swedish Meteorological and Hydrological Institute, Norrköping 60176, Sweden (corresponding author).
2. Head of Hydrological Research Unit, Associate Professor, President-Elect IAHS, Research and Development Dept., Swedish Meteorological and Hydrological Institute, Norrköping 60176, Sweden.
3. Research and Development Dept., Swedish Meteorological and Hydrological Institute, Norrköping 60176, Sweden.