Toward an ultra-simple spectral gravity wave parameterization for general circulation models

An Accurate Spectral Non-Orographic Gravity Wave Drag Parameterization for General Circulation Models

An accurate method of solution is developed for the Warner and McIntyre parameterization of non-orographic gravity-wave drag for the case of hydrostatic dynamics in the absence of rotation. The new scheme is sufficiently fast that it is suitable for operational use in a general circulation model. Multi-year climate runs of the Canadian Middle Atmosphere Model are performed using the new scheme,...

Toward a Physically Based Gravity Wave Source Parameterization in a General Circulation Model

Middle atmospheric general circulation models (GCMs) must employ a parameterization for small-scale gravity waves (GWs). Such parameterizations typically make very simple assumptions about gravity wave sources, such as uniform distribution in space and time or an arbitrarily specified GW source function. The authors present a configuration of the Whole Atmosphere Community Climate Model (WACCM)...

Toward an internal gravity wave spectrum in global ocean models

High-resolution global ocean models forced by atmospheric fields and tides are beginning to display realistic internal gravity wave spectra, especially as model resolution increases. This paper examines internal waves in global simulations with 0.08° and 0.04° (~8 and 4 km) horizontal resolutions, respectively. Frequency spectra of internal wave horizontal kinetic energy in the North Pacific li...

Parameterization of gravity current entrainment for ocean circulation models using a high-order 3D nonhydrostatic spectral element model

Building on the work by Turner [Turner, J.S., 1986. The development of the entrainment assumption and its application to geophysical flows. J. Fluid Mech. 173, 431–471] and Hallberg [Hallberg, R., 2000. Time integration of diapycnal diffusion and Richardson number dependent mixing in isopycnal coordinate ocean models. Mon. Weather Rev. 128, 1402–1419], an algebraic parameterization of the entra...

Parallel Spectral Element Dynamical Core for Atmospheric General Circulation Models