1. Now at CMCC Foundation—Euro‐Mediterranean Center on Climate Change Bologna Italy
2. National Center for Atmospheric Research Boulder CO USA
3. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USA
4. National Oceanic and Atmospheric Administration Physical Sciences Laboratory Boulder CO USA
5. Cooperative Institute of Climate, Ocean and Ecosystem Studies (CICOES) University of Washington Seattle WA USA
6. Alfred‐Wegener‐Institut, Helmholtz‐Zentrum für Polar‐ und Meeresforschung Bremerhaven Germany