Impact of the dynamical core on the direct simulation of tropical cyclones in a high-resolution global model

AMS Citation:
Reed, K., J. Bacmeister, N. Rosenbloom, M. F. Wehner, S. C. Bates, P. H. Lauritzen, J. E. Truesdale, and C. Hannay, 2015: Impact of the dynamical core on the direct simulation of tropical cyclones in a high-resolution global model. Geophysical Research Letters, 42, 3603-3608, doi:10.1002/2015GL063974.
Date:2015-05-16
Resource Type:article
Title:Impact of the dynamical core on the direct simulation of tropical cyclones in a high-resolution global model
Abstract: This paper examines the impact of the dynamical core on the simulation of tropical cyclone (TC) frequency, distribution, and intensity. The dynamical core, the central fluid flow component of any general circulation model (GCM), is often overlooked in the analysis of a model's ability to simulate TCs compared to the impact of more commonly documented components (e.g., physical parameterizations). The Community Atmosphere Model version 5 is configured with multiple dynamics packages. This analysis demonstrates that the dynamical core has a significant impact on storm intensity and frequency, even in the presence of similar large-scale environments. In particular, the spectral element core produces stronger TCs and more hurricanes than the finite-volume core using very similar parameterization packages despite the latter having a slightly more favorable TC environment. The results suggest that more detailed investigations into the impact of the GCM dynamical core on TC climatology are needed to fully understand these uncertainties.
Peer Review:Refereed
Copyright Information:Copyright 2015 American Geophysical Union.
OpenSky citable URL: ark:/85065/d7bg2q5r
Publisher's Version: 10.1002/2015GL063974
Author(s):
  • Kevin Reed - NCAR/UCAR
  • Julio Bacmeister - NCAR/UCAR
  • Nan Rosenbloom - NCAR/UCAR
  • M. Wehner
  • Susan Bates - NCAR/UCAR
  • Peter Lauritzen - NCAR/UCAR
  • John Truesdale - NCAR/UCAR
  • Cecile Hannay - NCAR/UCAR
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