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

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

doi:https://doi.org/10.5194/gmd-9-779-2016

Articles | Volume 9, issue 2

https://doi.org/10.5194/gmd-9-779-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/gmd-9-779-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

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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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.