Impacto
Downloads
Downloads per month over past year
Zurita Gotor, Pablo and Held, Isaac M. and Jansen, Malte F. (2015) Kinetic energy-conserving hyperdiffusion can improve low resolution atmospheric models. Journal of advances in modeling earth systems, 7 (3). pp. 1117-1135. ISSN 1942-2466
Preview |
PDF
Creative Commons Attribution Non-commercial No Derivatives. 1MB |
Official URL: http://dx.doi.org/10.1002/2015MS000480
Abstract
Motivated by findings that energetically consistent subgrid dissipation schemes can improve eddy-permitting ocean simulations, this work investigates the impact of the subgrid dissipation scheme on low-resolution atmospheric dynamical cores. A kinetic energy-conserving dissipation scheme is implemented in the model adding a negative viscosity term that injects back into the eddy field the kinetic energy dissipated by horizontal hyperdiffusion. The kinetic energy-conserving scheme enhances numerical convergence when horizontal resolution is changed with fixed vertical resolution and gives superior low-resolution results. Improvements are most obvious for eddy kinetic energy but also found in other fields, particularly with strong or little scale-selective horizontal hyperdiffusion. One advantage of the kinetic energy-conserving scheme is that it reduces the sensitivity of the model to changes in the subgrid dissipation rate, providing more robust results.
Item Type: | Article |
---|---|
Additional Information: | © 2015. The Authors. |
Uncontrolled Keywords: | General-circulation models; Horizontal resolution; Backscatter scheme; Simulated climate; Jet variability; Eddy; Sensitivity; System; Impact; Parameterizations |
Subjects: | Sciences > Physics > Geophysics Sciences > Physics > Meteorology |
ID Code: | 34895 |
Deposited On: | 18 Dec 2015 14:56 |
Last Modified: | 22 Dec 2015 18:30 |
Origin of downloads
Repository Staff Only: item control page