Terrain gravity wave drag parameterization method considering horizontal transmission factor
A technique for propagating factors, gravitational waves, applied in the field of atmospheric science research
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[0039] Taking the gravity wave excited by the topography of Hainan Island in July 2014 as an example, the drag parameterization method of terrain gravity wave considering the horizontal propagation factor proposed by the present invention is described in detail.
[0040] The first step is the preprocessing of terrain and ambient atmosphere. According to the global high-resolution terrain data provided by the National Atmospheric and Oceanic Administration of the United States, the terrain distribution of Hainan Island with a resolution of 5km can be obtained, see Figure 4 . According to the 2.5° reanalysis data provided by the European Center for Mesoscale Weather Forecasting, the vertical profile of wind speed and buoyancy frequency in Hainan Island in July 2014 can be obtained with 35 vertical layers, from the surface to about 31km height, as shown in Figure 5 shown. For simplicity, the horizontal wind speed is used here instead of the east-west wind, while the north-sou...
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