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GMD | Articles | Volume 13, issue 2
Geosci. Model Dev., 13, 685–705, 2020
https://doi.org/10.5194/gmd-13-685-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: The Norwegian Earth System Model: NorESM; basic development,...

Geosci. Model Dev., 13, 685–705, 2020
https://doi.org/10.5194/gmd-13-685-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

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 et al.

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Cited articles

Arakawa, A. and Lamb, V. R.: A potential enstrophy and energy conserving scheme for the shallow water equations, Mon. Weather Rev., 109, 18–36, 1981. 
Colella, P. and Woodward, P. R.: The piecewise parabolic method (PPM) for gas-dynamical simulations, J. Comput. Phys., 54, 174–201, 1984. 
Courant, R., Friedrichs, K., and Lewy, H.: Über die partiellen Differenzengleichungen der mathematischen Physik, Math. Ann., 100, 3274, https://doi.org/10.1007/BF01448839, 1928. 
Egger, J. and Hoinka, K.-P.: The annual cycle of the axial angular momentum of the atmosphere, J. Climate, 18, 757–771, 2005. 
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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.
We show that ensuring global conservation of the angular (rotational) momentum (AM) of the...
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