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RISFactors Controlling Nonlinearity in Mechanically Forced Stationary Waves over Orography
Publisher: American Meteorological Society
Abstract: The forcing of stationary waves by the earth?s large-scale orography is studied using a nonlinear stationary wave model based on the quasigeostrophic equations. The manner in which wind speed, meridional temperature gradient, ...
Quantifying Residual, Eddy, and Mean Flow Effects on Mixing in an Idealized Circumpolar Current
Publisher: American Meteorological Society
Abstract: AbstractMeridional diffusivity is assessed for a baroclinically unstable jet in a high-latitude idealized circumpolar current (ICC) using the Model for Prediction across Scales Ocean (MPAS-O) and the online Lagrangian in ...
A Potential Enstrophy and Energy Conserving Numerical Scheme for Solution of the Shallow-Water Equations on a Geodesic Grid
Publisher: American Meteorological Society
Abstract: Using the shallow water equations, a numerical framework on a spherical geodesic grid that conserves domain-integrated mass, potential vorticity, potential enstrophy, and total energy is developed. The numerical scheme is ...
The ZM Grid: An Alternative to the Z Grid
Publisher: American Meteorological Society
Abstract: Shallow-water equations discretized on a perfect hexagonal grid are analyzed using both a momentum formulation and a vorticity-divergence formulation. The vorticity-divergence formulation uses the unstaggered Z grid that ...
Impact of Variable-Resolution Meshes on Midlatitude Baroclinic Eddies Using CAM-MPAS-A
Publisher: American Meteorological Society
Abstract: he effects of a variable-resolution mesh on simulated midlatitude baroclinic eddies in idealized settings are examined. Both aquaplanet and Held?Suarez experiments are performed using the Model for Prediction Across ...
An Incremental Remapping Transport Scheme on a Spherical Geodesic Grid
Publisher: American Meteorological Society
Abstract: Weather and climate models contain equations for transporting conserved quantities such as the mass of air, water, ice, and associated tracers. Ideally, the numerical schemes used to solve these equations should be ...
Understanding the Seasonality of Orographically Forced Stationary Waves: Interaction between Mechanical and Thermal Forcing
Publisher: American Meteorological Society
Abstract: Idealized simulations of the atmosphere?s stationary response to the Rockies, Tibetan Plateau, and the Greenland Ice Sheet are made using a nonlinear, quasigeostrophic model and are compared to observations. Observational ...
Modeling the Atmospheric General Circulation Using a Spherical Geodesic Grid: A New Class of Dynamical Cores
Publisher: American Meteorological Society
Abstract: This paper documents the development and testing of a new type of atmospheric dynamical core. The model solves the vorticity and divergence equations in place of the momentum equation. The model is discretized in the ...
Diagnosing Isopycnal Diffusivity in an Eddying, Idealized Midlatitude Ocean Basin via Lagrangian, in Situ, Global, High-Performance Particle Tracking (LIGHT)
Publisher: American Meteorological Society
Abstract: sopycnal diffusivity due to stirring by mesoscale eddies in an idealized, wind-forced, eddying, midlatitude ocean basin is computed using Lagrangian, in Situ, Global, High-Performance Particle Tracking (LIGHT). Simulation ...
Atmospheric Moisture Budget and Spatial Resolution Dependence of Precipitation Extremes in Aquaplanet Simulations
Publisher: American Meteorological Society
Abstract: his study investigates the moisture budgets and resolution dependency of precipitation extremes in an aquaplanet framework based on the Community Atmosphere Model, version 4 (CAM4). Moisture budgets from simulations using ...