台风模拟结果分析
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Nov-13
With COAWST system, I ran two cases. In one case, only WRF model was applied to the simulation. In the other case, I used the WRF-ROMS-SWAN coupling model. Figure 1 shows the result of first case at t=27 hours. Figure 2 displays the other case at the same time.
With WRF model only, the surface roughness is a linear function of surface wind speed. When coupled with SWAN, the surface roughness is calculated due to the result of SWAN. I also output the Drag coefficient at 10m. But the results turned to be Zero. I guess the atmospheric boundary layer scheme did not calculate this variable.
Figure 1. Distribution of surface roughness (shading; *e-4m) and Sea level pressure (black contour; hPa) at t=27 h. These results are from WRF model.
Figure 2. Distribution of surface roughness (shading; *e-4m) and Sea level
pressure (black contour; hPa) at t=27 h. These results are from WRF-ROMS-SWAN coupling model.
and the maximum wind speed (lower panel).
Figure 4. Distribution of surface roughness (shading; *e-4m) and 10 m wind speed (black contour; m/s) at t=27 h. These results are from WRF-ROMS-SWAN coupling model.
Figure5. Distribution of surface roughness (shading; *e-4m) and sea surface wave heigh(black contour; m) at t=27 h. These results are from WRF-ROMS-SWAN coupling model.。