Abstract
Idealized normal-mode baroclinic wave simulations are conducted to examine the impact of continuousmesh refinement compared with stepwise changes in resolution using nested grids. The nested-grid results are produced using theAdvancedResearchWeather Research and Forecasting (WRF-ARW)Model, hereafterARW, and the continuous refinement results are produced using the atmospheric component of the Model for Prediction Across Scales-Atmosphere (MPAS-A). For the nested domain simulations with the ARW, variants of both one-way and two-way nesting techniques are examined. Significant reflection and distortion of waves are evident in results using one-way nesting, with the error increasing with decreasing boundary-update frequency. With continuous updating of the boundary conditions in one-way and two-way nesting, wave distortion is still evident near the lateral boundaries but the distortion is much less than with infrequent boundary updates. The conformal Voronoi meshes inMPAS provide a much smoother transition between mesh resolutions. Variableresolution mesh MPAS-A simulations, using different transition zones between high- and low-resolution regions, are compared with the results from the ARW simulations. In the MPAS-A simulations, there is no significant reflection of gravity waves, suggesting that continuous mesh refinement can eliminate distortions that tend to occur along the boundaries of nested meshes.
| Original language | English |
|---|---|
| Pages (from-to) | 3614-3634 |
| Number of pages | 21 |
| Journal | Monthly Weather Review |
| Volume | 142 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Atmospheric Science
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A comparison of mesh refinement in the global MPAS-A and WRF models using an idealized normal-mode baroclinic wave simulation. / Park, Sang Hun; Klemp, Joseph B.; Skamarock, William C.
In: Monthly Weather Review, Vol. 142, No. 10, 01.01.2014, p. 3614-3634.Research output: Contribution to journal › Article
TY - JOUR
T1 - A comparison of mesh refinement in the global MPAS-A and WRF models using an idealized normal-mode baroclinic wave simulation
AU - Park, Sang Hun
AU - Klemp, Joseph B.
AU - Skamarock, William C.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Idealized normal-mode baroclinic wave simulations are conducted to examine the impact of continuousmesh refinement compared with stepwise changes in resolution using nested grids. The nested-grid results are produced using theAdvancedResearchWeather Research and Forecasting (WRF-ARW)Model, hereafterARW, and the continuous refinement results are produced using the atmospheric component of the Model for Prediction Across Scales-Atmosphere (MPAS-A). For the nested domain simulations with the ARW, variants of both one-way and two-way nesting techniques are examined. Significant reflection and distortion of waves are evident in results using one-way nesting, with the error increasing with decreasing boundary-update frequency. With continuous updating of the boundary conditions in one-way and two-way nesting, wave distortion is still evident near the lateral boundaries but the distortion is much less than with infrequent boundary updates. The conformal Voronoi meshes inMPAS provide a much smoother transition between mesh resolutions. Variableresolution mesh MPAS-A simulations, using different transition zones between high- and low-resolution regions, are compared with the results from the ARW simulations. In the MPAS-A simulations, there is no significant reflection of gravity waves, suggesting that continuous mesh refinement can eliminate distortions that tend to occur along the boundaries of nested meshes.
AB - Idealized normal-mode baroclinic wave simulations are conducted to examine the impact of continuousmesh refinement compared with stepwise changes in resolution using nested grids. The nested-grid results are produced using theAdvancedResearchWeather Research and Forecasting (WRF-ARW)Model, hereafterARW, and the continuous refinement results are produced using the atmospheric component of the Model for Prediction Across Scales-Atmosphere (MPAS-A). For the nested domain simulations with the ARW, variants of both one-way and two-way nesting techniques are examined. Significant reflection and distortion of waves are evident in results using one-way nesting, with the error increasing with decreasing boundary-update frequency. With continuous updating of the boundary conditions in one-way and two-way nesting, wave distortion is still evident near the lateral boundaries but the distortion is much less than with infrequent boundary updates. The conformal Voronoi meshes inMPAS provide a much smoother transition between mesh resolutions. Variableresolution mesh MPAS-A simulations, using different transition zones between high- and low-resolution regions, are compared with the results from the ARW simulations. In the MPAS-A simulations, there is no significant reflection of gravity waves, suggesting that continuous mesh refinement can eliminate distortions that tend to occur along the boundaries of nested meshes.
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U2 - 10.1175/MWR-D-14-00004.1
DO - 10.1175/MWR-D-14-00004.1
M3 - Article
VL - 142
SP - 3614
EP - 3634
JO - Monthly Weather Review
JF - Monthly Weather Review
SN - 0027-0644
IS - 10
ER -