1. Department of Environmental Sciences University of Basel Basel Switzerland
2. Max Planck Institute for Chemistry Climate Geochemistry Department Mainz Germany
3. Department of Geology Grand Valley State University Allendale MI USA
4. Department of Geosciences National Taiwan University Taipei Taiwan
5. University of California Earth and Planetary Sciences Department Santa Cruz CA USA
6. Department of Geosciences Princeton University Princeton NJ USA
7. ETH Zurich Geological Institute Zurich Switzerland