Articles | Volume 13, issue 2
https://doi.org/10.5194/gmd-13-685-2020
https://doi.org/10.5194/gmd-13-685-2020
Development and technical paper
 | 
21 Feb 2020
Development and technical paper |  | 21 Feb 2020

Enforcing conservation of axial angular momentum in the atmospheric general circulation model CAM6

Thomas Toniazzo, Mats Bentsen, Cheryl Craig, Brian E. Eaton, Jim Edwards, Steve Goldhaber, Christiane Jablonowski, and Peter H. Lauritzen

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Thomas Toniazzo on behalf of the Authors (16 Jan 2020)  Author's response   Manuscript 
ED: Publish subject to minor revisions (review by editor) (17 Jan 2020) by Paul Ullrich
AR by Thomas Toniazzo on behalf of the Authors (22 Jan 2020)  Author's response   Manuscript 
ED: Publish as is (23 Jan 2020) by Paul Ullrich
AR by Thomas Toniazzo on behalf of the Authors (24 Jan 2020)  Manuscript 
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Short summary
We show that ensuring global conservation of the angular (rotational) momentum (AM) of the atmosphere along the Earth's axis of rotation, which is a property of the governing equations, has important and beneficial consequences for the quality of the numerical simulation of the general circulation of the atmosphere. We discuss the causes of non-conservation in the FV dynamical core of the Community Atmosphere Model (CAM), propose remedies, and show their impact in correcting systematic biases.