Articles | Volume 13, issue 2
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

Model code and software

CAM: The Community Atmosphere Model S. Goldhaber and C. Craig

tto061/CAM: v6.1.029.GMD_AM_paper (Version cam6_1_029) S. Goldhaber, C. Craig, and T. Toniazzo

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.