Multiscale Modeling Framework using Element-based Galerkin Methods for Moist Atmospheric Limited-Area Simulations
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Authors
Kang, Soonpil
Kelly, James F.
Austin, Anthony P.
Giraldo, Francis X.
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Date of Issue
2024
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arxiv.org
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Abstract
This paper presents a multiscale modeling framework (MMF) to model moist atmospheric limited-area weather. The MMF resolves large-scale convection using a coarse grid while simultaneously resolving local features through numerous fine local grids and coupling them seamlessly. Both large- and small-scale processes are modeled using the compressible Navier-Stokes equations within the Nonhydrostatic Unified Model of the Atmosphere (NUMA), and they are discretized using a continuous element-based Galerkin method (spectral elements) with high-order basis functions. Consequently, the large-scale and small-scale models share the same dynamical core but have the flexibility to be adjusted individually. The proposed MMF method is tested in 2D and 3D idealized limited area weather problems involving storm clouds produced by squall line and supercell sim ulations. The MMF numerical results showed enhanced representation of cloud processes compared to the coarse model.
Type
Article
Description
This work was supported by the Office of Naval Research under Grant No. N0001419WX00721. F. X. Giraldo was also supported by the National Science Foundation under grant AGS-1835881. This work was performed when Soonpil Kang held a National Academy of Sciences’ National Research Council Fellowship at the Naval Postgraduate School.
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Naval Postgraduate School (U.S.)
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26 p.
Citation
Kang, Soonpil, et al. "Multiscale Modeling Framework using Element-based Galerkin Methods for Moist Atmospheric Limited-Area Simulations." arXiv preprint arXiv:2407.05927 (2024).
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.