1. Chemical
Analytics and Biogeochemistry, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, 12587 Berlin, Germany
2. Nordic
Centre for Earth Evolution (NordCEE), University of Southern Denmark, 5230 Odense M, Denmark
3. Scottish Association for Marine Sciences, Scottish Marine Institute, PA37 1QA Oban, United Kingdom
4. Arctic
Research Centre, University of Århus, 8000 Århus C, Denmark
5. Institute
for Landscape Biogeochemistry, Leibniz Centre for Agricultural Landscape Research (ZALF), 15374 Müncheberg, Germany
6. Institute
F.-A. Forel, Section of Earth and Environmental Sciences, Faculty
of Sciences, University of Geneva, 1211 Geneva 4, Switzerland