2008
DOI: 10.1142/s0219876208001443
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Early Experiences With the 360tf Ibm Blue Gene/L Platform

Abstract: The High Order Method Modeling Environment is a scalable, spectral-element-based prototype for the Community Atmospheric Model component of the Community Climate System Model. The 3D moist primitive equations are solved on the cubed sphere with a hybrid pressure η vertical coordinate using an Emanuel convective parametrization for moist processes. Semi-implicit time integration, based on a preconditioned conjugate gradient solver, circumvents the time step restrictions associated with gravity waves. Benchmarks… Show more

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Cited by 12 publications
(11 citation statements)
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“…Numerical simulations of organized tropical convective systems using the High-Order Methods Modeling Environment (HOMME) as a dry dynamical core (Dennis et al 2005;Bhanot et al 2008;Taylor et al 2008) with coarse resolution coupled to the multicloud convective parameterization of Khouider and Majda (KM06a;KM08a) are presented here for the idealized case of an aquaplanet with the convective forcing restricted to the tropical region between roughly 308S and 308N. This multicloud model parameterization has two features absent in many contemporary GCMs (Lin et al 2006): low-level moisture preconditioning through congestus clouds and the direct effect of stratiform clouds, including downdrafts that cool and dry the boundary layer.…”
Section: Concluding Summary and Discussionmentioning
confidence: 99%
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“…Numerical simulations of organized tropical convective systems using the High-Order Methods Modeling Environment (HOMME) as a dry dynamical core (Dennis et al 2005;Bhanot et al 2008;Taylor et al 2008) with coarse resolution coupled to the multicloud convective parameterization of Khouider and Majda (KM06a;KM08a) are presented here for the idealized case of an aquaplanet with the convective forcing restricted to the tropical region between roughly 308S and 308N. This multicloud model parameterization has two features absent in many contemporary GCMs (Lin et al 2006): low-level moisture preconditioning through congestus clouds and the direct effect of stratiform clouds, including downdrafts that cool and dry the boundary layer.…”
Section: Concluding Summary and Discussionmentioning
confidence: 99%
“…The multicloud model is very successful in capturing most of the Wheeler-KiladisTakayabu spectrum of convectively coupled waves (Takayabu 1994a;Wheeler and Kiladis 1999) in terms of linear wave theory (KM06a; KM08b; Han and Khouider 2010) and nonlinear organization of large-scale envelopes mimicking across-scale interactions of the MJO and convectively coupled waves (KM07; KM08a), in the idealized context of a simple two-baroclinic modes model. Here we propose to use the next-generation National Center for Atmospheric Research (NCAR) GCM, the HighOrder Methods Modeling Environment (HOMME), a highly parallel code based on a spectral element discretization of the hydrostatic primitive equations on the cubed sphere (Dennis et al 2005;Bhanot et al 2008;Taylor et al 2008) at coarse resolution as a dry dynamical core coupled to the multicloud parameterization.…”
Section: Introductionmentioning
confidence: 99%
“…This method is designed for fully unstructured quadrilateral meshes. The current configurations in CAM are based on the cubed-sphere grid (Taylor et al, 2007(Taylor et al, , 2008Bhanot et al, 2008;Nair et al, 2009). Spectral elements are a kind of a continuous Galerkin hp finite element method (Karniadakis and Sherwin, 1999;Canuto et al, 2007), where h is the number of elements and p the polynomial order.…”
Section: Model and Simulation Detailsmentioning
confidence: 99%
“…parallel performance. It was used for earthquake modeling by the 2003 Gordon Bell Best Performance winner [11] and has successfully scaled to ∼ 100, 000 processors [12,13].…”
Section: Introductionmentioning
confidence: 99%