The assistance of T-REX, University of Wyoming, and NCAR staff during the field phase was essential. Special thanks to the pilots who helped modify the flight-track designs to fit the aircraft and Air Traffic Control (ATC) capabilities. Strategic discussions with Joach Kuettner, Jim Moore, Richard Dirks, Brian Ridley, Laura Wang, Bill Randel, and others are much appreciated. The ozone data were provided by Ilana Pollock of NCAR. The ATC personnel in the Joshua Control Area were very helpful. RBS appreciates relevant discussions with Arnt Eliassen in 1977 and with Dale Durran recently. Three anonymous reviewers gave useful comments. The Yale group was supported by the National Science Foundation (ATM-112354 and -0531212). J. Doyle was supported by ONR PE-0601153N.
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