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Paraskevi Giannakaki and Olivia Martius

: Atmospheric predictability and Rossby wave packets . Quart. J. Roy. Meteor. Soc. , 141 , 2793 – 2802 , doi: 10.1002/qj.2564 . Hoskins, B. , and Woollings T. , 2015 : Persistent extratropical regimes and climate extremes . Curr. Climate Change Rep. , 1 ( 3 ), 115 – 124 , doi: 10.1007/s40641-015-0020-8 . Jolliffe, I. T. , and Stephenson D. B. , 2012 : Forecast Verification: A Practitioner’s Guide in Atmospheric Science. John Wiley and Sons, 292 pp . Langland, R. H. , Shapiro M. A

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Marlene Baumgart, Michael Riemer, Volkmar Wirth, Franziska Teubler, and Simon T. K. Lang

analysis and deterministic forecast data from the Atmospheric Model high-resolution 10-day forecast (HRES) of the European Centre for Medium-Range Weather Forecasts (ECMWF). Error growth is analyzed for the forecast starting at 0000 UTC 12 November 2013. 1 This forecast covers an extreme precipitation event over Sardinia on 18–19 November 2013, which was closely connected with the preceding Rossby wave packet, wave breaking, and the formation of a cutoff low. The error growth within this Rossby wave

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Julian F. Quinting and Sarah C. Jones

. , and F. Vitart , 2015 : Atmospheric predictability and Rossby wave packets . Quart. J. Roy. Meteor. Soc. , 141 , 2793 – 2802 , doi: 10.1002/qj.2564 . Griffin , K. S. , and L. F. Bosart , 2014 : The extratropical transition of Tropical Cyclone Edisoana (1990) . Mon. Wea. Rev. , 142 , 2772 – 2793 , doi: 10.1175/MWR-D-13-00282.1 . Hamill , T. M. , G. T. Bates , J. S. Whitaker , D. R. Murray , M. Fiorino , T. J. Galarneau , Y. Zhu , and W. Lapenta , 2013 : NOAA

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Tobias Selz and George C. Craig

gravity waves radiating from convective regions in upscale growth or errors will be discussed. 2. Experimental design This study employs a nonhydrostatic limited-area atmospheric model provided by the Consortium for Small-Scale Modeling (COSMO) ( Baldauf et al. 2011 ). It has been applied for many years by the German Meteorological Service [Deutscher Wetterdienst (DWD)] for operational forecasting with a 7-km grid spacing (COSMO-EU) and a 2.8-km grid spacing (COSMO-DE). In the higher

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Julia H. Keller, Christian M. Grams, Michael Riemer, Heather M. Archambault, Lance Bosart, James D. Doyle, Jenni L. Evans, Thomas J. Galarneau Jr., Kyle Griffin, Patrick A. Harr, Naoko Kitabatake, Ron McTaggart-Cowan, Florian Pantillon, Julian F. Quinting, Carolyn A. Reynolds, Elizabeth A. Ritchie, Ryan D. Torn, and Fuqing Zhang

.1175/MWR-D-17-0219.1 Riboldi , J. , C. M. Grams , M. Riemer , and H. M. Archambault , 2019 : A phase locking perspective on Rossby wave amplification and atmospheric blocking downstream of recurving western North Pacific tropical cyclones . Mon. Wea. Rev. , 147 , 567 – 589 , https://doi.org/10.1175/MWR-D-18-0271.1 . 10.1175/MWR-D-18-0271.1 Riemer , M. , and S. C. Jones , 2010 : The downstream impact of tropical cyclones on a developing baroclinic wave in idealized scenarios of

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Christian M. Grams and Heather M. Archambault

, S. L. , C. M. Dunning , J. Methven , G. Masato , and J. M. Chagnon , 2014 : Systematic model forecast error in Rossby wave structure . Geophys. Res. Lett. , 41 , 2979 – 2987 , doi: 10.1002/2014GL059282 . Grazzini , F. , and F. Vitart , 2015 : Atmospheric predictability and Rossby wave packets: Predictability and Rossby wave packets . Quart. J. Roy. Meteor. Soc. , 141 , 2793 – 2802 , doi: 10.1002/qj.2564 . Harr , P. A. , and R. L. Elsberry , 2000 : Extratropical

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Maxi Boettcher and Heini Wernli

Centre for Atmospheric Science Computational Modelling Services). We thank Sue Gray (University of Reading) for making this package available to us. We are also grateful to Patricia Heckendorn for developing an initial version of the DRW tracking algorithm and to Michael Sprenger for the composite tool. NASA is acknowledged for providing TRMM precipitation estimates. APPENDIX A The Wave–Vortex Terminology Issues The flow feature examined in the present study can be viewed as a hybrid with both wave

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Michael Riemer, Marlene Baumgart, and Sven Eiermann

midlatitude, baroclinic Rossby wave trains (e.g., Harr and Dea 2009 ; Riemer and Jones 2010 ; Pantillon et al. 2013 ; Grams et al. 2013b ; Archambault et al. 2013 ). In an idealized ET scenario, Riemer and Jones (2010) identified the modification of the downstream cyclogenesis as one important first step in the chain of events governing the downstream dispersion. Their result is consistent with the concept of downstream baroclinic development ( Orlanski and Sheldon 1995 ). In this study, we focus

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Lars Wiegand, Arwen Twitchett, Cornelia Schwierz, and Peter Knippertz

1. Introduction Rossby wave trains are the dominant dynamical feature of the upper troposphere in the midlatitudes (e.g., Hoskins and Ambrizzi 1993 ). They propagate eastward with the mean flow and their associated ridges and troughs are related to high and low pressure systems at the surface. In cases of nonlinear amplification, Rossby wave breaking (RWB) can occur. The regions with the highest occurrence of RWB are at the downstream end of the storm tracks ( Wernli and Sprenger 2007

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Julian F. Quinting, Michael M. Bell, Patrick A. Harr, and Sarah C. Jones

from genesis to ET by research aircraft and aerosondes. During the ET of Ophelia, two National Oceanic and Atmospheric Administration (NOAA) P-3 flights sampled for the first time the core dynamical structure and structural changes of an ET system using airborne Doppler radar and dropsondes. The observations showed that the upper portion of Ophelia’s circulation was sheared away by strong upper-level winds. Findings from the research flights also indicated the intrusion of dry, midlatitude air

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