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Thomas Jung and Peter B. Rhines

the study of Atlantic cyclogenesis in several directions. Model resolution will be carried from T L 95 to T L 799 (grid resolutions of roughly 210 to 25 km) using the global European Centre for Medium-Range Weather Forecasts (ECMWF) forecast model system. Forty-year ECMWF Re-Analysis (ERA-40) data (roughly equivalent to T L 159 resolution) will be compared with model simulations, looking at the life cycle of cyclone development associated with strong pressure-drag events. Vertical structure of the

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O. Martius, C. Schwierz, and H. C. Davies

and anticyclonic baroclinic wave life cycles that stem from idealized simulations of the evolution of baroclinic waves (e.g., Davies et al. 1991 ; Thorncroft et al. 1993 ). a. Baroclinic life cycles and background flow setting The life cycles of baroclinic waves are a long-standing theme in meteorological research [see Simmons (1998) for a review]. The life cycle concept is of direct interest to the forecasting community ( Bjerknes and Solberg 1922 ) and also plays a central role in the

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