1. Institute for Meteorology Universität Leipzig Leipzig Germany
2. Institute of Atmospheric and Climate Science ETH Zürich Zürich Switzerland
3. Atmospheric, Oceanic and Planetary Physics Department of Physics University of Oxford Oxford UK
4. Center for Climate Systems Modeling ETH Zürich Zürich Switzerland
5. Max Planck Institute for Meteorology Hamburg Germany
6. Leibniz Institute for Tropospheric Research Leipzig Germany
7. Now at Pacific Northwest National Laboratory Richland WA USA
8. Pacific Northwest National Laboratory Richland WA USA