1. Potsdam Institute for Climate Impact Research, 14473 Potsdam, Germany
2. Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912
3. Institute at Brown for Environment and Society, Brown University, Providence, RI 02912
4. Department of Earth Sciences, University of Pisa, 56126 Pisa, Italy
5. Physics of Ice, Climate and Earth, Niels Bohr Institute, University of Copenhagen, 2200 Copenhagen, Denmark
6. Department of Geosciences, University of Tübingen, 72076 Tübingen, Germany
7. Institute of Environmental Physics, Heidelberg University, 69120 Heidelberg, Germany
8. Department of Physics, University of Tübingen, 72076 Tübingen, Germany
9. Centre for Marine and Environmental Research, Faculty of Sciences and Technology, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
10. Earth System Modelling, School of Engineering & Design, Technical University of Munich, Munich 80333, Germany
11. Global Systems Institute, University of Exeter, Exeter EX4 4QF, UK
12. Department of Mathematics, University of Exeter, Exeter EX4 4QF, UK