1. Institute of Geophysics; Czech Academy of Sciences; Prague Czech Republic
2. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research; Bremerhaven Germany
3. UFZ Helmholtz-Centre for Environmental Research; Halle Germany
4. Earth Science Institute; Slovak Academy of Sciences; Bratislava Slovak Republic
5. GFZ German Research Centre for Geosciences; Potsdam Germany