1. Helmholtz‐Centre Potsdam ‐ GFZ German Research Centre for Geosciences Potsdam Germany
2. Institute of Physics and Astronomy University of Potsdam Potsdam Germany
3. Department of Database Systems and Data Mining Ludwig‐Maximilians University of Munich Munich Germany
4. Department of Earth, Planetary and Space Sciences University of California Los Angeles CA USA
5. Department of Earth and Environmental Sciences Ludwig Maximilians University of Munich Munich Germany
6. Max Planck Institute for Solar System Research Göttingen Germany
7. Space Science and Applications Los Alamos National Laboratory Los Alamos NM USA