The authors thank George Kiladis for his detailed insights and comments. Anonymous reviewers provided valuable comments on earlier versions of this manuscript that led to significant improvements. These results were obtained using the CLAUS archive held at the British Atmospheric Data Centre, produced using ISCCP source data distributed by the NASA Langley Data Center. The ERA-40 data for this study are from the Research Data Archive (RDA), which is maintained by the Computational and Information Systems Laboratory (CISL) at the National Center for Atmospheric Research (NCAR). NCEP reanalysis data were provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA. Both authors acknowledge the support of the National Science Foundation through Grant ATM-2574200.
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