1. Center for Ocean–Land–Atmosphere Studies, George Mason University, Fairfax, Virginia
2. NASA Goddard Space Flight Center, Greenbelt, Maryland
3. NOAA/National Centers for Environmental Prediction/Environmental Modeling Center, College Park, Maryland
4. European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom
5. Instituto Dom Luiz, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
6. National Center for Atmospheric Research, Boulder, Colorado