Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 19, issue 10
Articles | Volume 19, issue 10
https://doi.org/10.5194/gmd-19-4055-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-19-4055-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 10
Development and technical paper
 | 
18 May 2026
Development and technical paper |  | 18 May 2026

Parameterization and evaluation of nonhydrostatic effect in the orographic gravity wave drag in China Meteorological Administration Global Forecast System (CMA-GFS) v4.0 model

Rongrong Zhang, Zhenzhen Ai, Xin Xu, Haile Xue, and Qiying Chen

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Short summary
In this study, the orographic gravity wave drag (OGWD) parameterization scheme in the CMA-GFS v4.0 model is revised to account for nonhydrostatic effects (NHE) on the surface momentum flux of subgrid-scale orographic gravity waves. Through a series of 10-day medium-range forecasts, the revised OGWD scheme is shown to significantly improve the simulation of large-scale circulation in the Northern Hemisphere (NH), especially in the high latitudes.
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