Articles | Volume 9, issue 2
Development and technical paper
25 Feb 2016
Development and technical paper |  | 25 Feb 2016

Impact of surface coupling grids on tropical cyclone extremes in high-resolution atmospheric simulations

Colin M. Zarzycki, Kevin A. Reed, Julio T. Bacmeister, Anthony P. Craig, Susan C. Bates, and Nan A. Rosenbloom

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Cited articles

Bacmeister, J. T., Wehner, M. F., Neale, R. B., Gettelman, A., Hannay, C., Lauritzen,, P. H., Caron, J. M., and Truesdale, J. E.: Exploratory High-Resolution Climate Simulations using the Community Atmosphere Model (CAM), J. Climate, 27, 3073–3099,, 2014.
Balaji, V., Anderson, J., Held, I., Winton, M., Durachta, J., Malyshev, S., and Stouffer, R. J.: The Exchange Grid: a mechanism for data exchange between earth system components on independant grids, in: 2005 International Conference on Parallel Computational Fluid Dynamics, Elsevier Acadamic Press, College Park, MD, USA, 2006.
Bengtsson, L., Hodges, K. I., and Esch, M.: Tropical cyclones in a T159 resolution global climate model: comparison with observations and re-analyses, Tellus A, 59, 396–416,, 2007.
Camargo, S. J.: Global and Regional Aspects of Tropical Cyclone Activity in the CMIP5 Models, J. Climate, 26, 9880–9902,, 2013.
Chan, J. C. L., Duan, Y., and Shay, L. K.: Tropical Cyclone Intensity Change from a Simple Ocean–Atmosphere Coupled Model, J. Atmos. Sci., 58, 154–172,<0154:TCICFA>2.0.CO;2, 2001.
Short summary
This paper highlights the sensitivity of simulated tropical cyclone climatology to the choice of ocean coupling grid in high-resolution climate simulations. When computations of atmosphere–ocean interactions are carried out on the coarser grid in the system, key quantities such as surface wind drag and heat fluxes are incorrectly calculated. In the case of a coarser ocean grid, significantly stronger cyclone winds result, due to misaligned frictional vectors in the atmospheric dynamical core.