1. Laboratory for Atmospheric Acoustics, Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography University of California, San Diego La Jolla CA USA
2. Jülich Supercomputing Centre Forschungszentrum Jülich Jülich Germany
3. NorthWest Research Associates, Inc. CoRA Office Boulder CO USA
4. National Centre for Atmospheric Science—Climate, Department of Meteorology University of Reading Reading UK