We have benefited considerably from discussions with and comments from Drs. Brad Ferrier, Lynn McMurdie, Michael Richman, Paul Roebber, and David Stensrud. Comments by anonymous reviewers and Editor Jim Doyle were helpful in clarifying portions of this paper. Funding was provided by NOAA/Office of Oceanic and Atmospheric Research under NOAA–University of Oklahoma Cooperative Agreement NA17RJ1227 (U.S. Department of Commerce).
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