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Development and application of an evaluation method for the WRF Mesoscale Model
Original publisher: White Sands Missile Range, NM : Army Research Laboratory,  OCLC Number: (OCoLC)74279854 Subject: Meteorology -- Research. Excerpt: ... 5. Analysis Program Figure 4. Horizontal and vertical grids of the WRF. The WRF uses a C grid staggering for variables, as shown in figure 4 ( Skamarock, 2005 ). In the grid, velocity components...
Original publisher: White Sands Missile Range, NM : Army Research Laboratory,  OCLC Number: (OCoLC)74279854 Subject: Meteorology -- Research. Excerpt: ... 5. Analysis Program Figure 4. Horizontal and vertical grids of the WRF. The WRF uses a C grid staggering for variables, as shown in figure 4 ( Skamarock, 2005 ). In the grid, velocity components ( u, v, w ) are staggered at one-half grid length from the thermodynamic variable . 5.1 Wind Velocity Components Given the grid location of potential temperature by ( i, j, k, t ), wind vector components u, v, and w at ( i, j, k ) are calculated by u ( i, j, k, t ) = 0.5 ( u ( i-1 / 2, j, k, t ) + u ( i + 1 / 2, j. k, t ) ) ( 1 ) v ( i, j, k, t ) = 0.5 ( v ( i, j-1 / 2, k, t ) + v ( i, j + 1 / 2, k, t ) ) ( 2 ) w ( i, j, k, t ) = 0.5 ( w ( i, j, k-1 / 2, t ) + w ( i, j, k + 1 / 2, t ) ) ( 3 ) 5.2 Height The WRF output file contains base state and perturbation geopotentials ( and ' ). Vertical height Z ( i, j, k, t ) is calculated by Z ( i, j, k, t ) = ( ( i, j, k, t ) + ' ( i, j, k, t ) ) / g ( 4 ) 2 where g is the gravitational acceleration ( 9.81 m / s ). 9
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