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RISThe Impact of GCM Dynamical Cores on Idealized Sudden Stratospheric Warmings and Their QBO Interactions
Publisher: American Meteorological Society
Abstract: he paper demonstrates that sudden stratospheric warmings (SSWs) can be simulated in an ensemble of dry dynamical cores that miss the typical SSW forcing mechanisms like moist processes, land?sea contrasts, or topography. ...
Idealized Quasi-Biennial Oscillations in an Ensemble of Dry GCM Dynamical Cores
Publisher: American Meteorological Society
Abstract: he paper demonstrates that quasi-biennial oscillation (QBO)-like oscillations can be simulated in an ensemble of dry GCM dynamical cores that are driven by a simple Held?Suarez temperature relaxation and low-level Rayleigh ...
Operator-Split Runge–Kutta–Rosenbrock Methods for Nonhydrostatic Atmospheric Models
Publisher: American Meteorological Society
Abstract: his paper presents a new approach for discretizing the nonhydrostatic Euler equations in Cartesian geometry using an operator-split time-stepping strategy and unstaggered upwind finite-volume model formulation. Following ...
An Analytic Vortex Initialization Technique for Idealized Tropical Cyclone Studies in AGCMs
Publisher: American Meteorological Society
Abstract: The paper discusses the design of idealized tropical cyclone experiments in atmospheric general circulation models (AGCMs). The evolution of an initially weak, warm-core vortex is investigated over a 10-day period with ...
Experimental Tropical Cyclone Forecasts Using a Variable-Resolution Global Model
Publisher: American Meteorological Society
Abstract: ropical cyclone (TC) forecasts at 14-km horizontal resolution (0.125°) are completed using variable-resolution (V-R) grids within the Community Atmosphere Model (CAM). Forecasts are integrated twice daily from 1 August to ...
Moving Vortices on the Sphere: A Test Case for Horizontal Advection Problems
Publisher: American Meteorological Society
Abstract: A new two-dimensional advection test on the surface of the sphere is proposed. The test combines a solid-body rotation and a deformational flow field to form moving vortices over the surface of the sphere. The resulting ...
Bridging the (Knowledge) Gap between Physics and Dynamics
Publisher: American Meteorological Society
Assessing Tracer Transport Algorithms and the Impact of Vertical Resolution in a Finite-Volume Dynamical Core
Publisher: American Meteorological Society
Abstract: odeling the transport of trace gases is an essential part of any atmospheric model. The tracer transport scheme in the Community Atmosphere Model finite-volume dynamical core (CAM-FV), which is part of the National Center ...
Two Dynamical Core Formulation Flaws Exposed by a Baroclinic Instability Test Case
Publisher: American Meteorological Society
Abstract: Two flaws in the semi-Lagrangian algorithm originally implemented as an optional dynamical core in the NCAR Community Atmosphere Model (CAM3.1) are exposed by steady-state and baroclinic instability test cases. Remedies ...
A Balanced Tropical Cyclone Test Case for AGCMs with Background Vertical Wind Shear
Publisher: American Meteorological Society
Abstract: his paper presents a balanced tropical cyclone (TC) test case designed to improve current understanding of how atmospheric general circulation model (AGCM) configurations affect simulated TC development and behavior. It ...