1. Department of Geosciences and Laboratoire de Météorologie Dynamique (CNRS and IPSL), École Normale Supérieure and PSL University, 75132 Paris Cedex 05, France
2. Department of Atmospheric and Oceanic Science, University of California at Los Angeles, Los Angeles, California 90095, USA
3. Geosciences Montpellier, University of Montpellier, CNRS, 34095 Montpellier, France
4. Lamont Doherty Earth Observatory, Columbia University, New York, New York 10964, USA