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You are here: Home / Air Quality / Air Modeling / Air Modeling Data / Houston-Galveston-Brazoria 1-Hour Ozone SIP Mid-Course Review Modeling (2000 Episode) / Houston-Galveston-Brazoria Ozone SIP Mid-Course Review Modeling: MM5 Modeling Domain

Houston-Galveston-Brazoria Ozone SIP Mid-Course Review Modeling: MM5 Modeling Domain

Meteorological model MM5 modeling domain horizontal grid and vertical layer structures for the Houston-Galveston-Brazoria Ozone SIP Mid-Course Review.

Following are the MM5 horizontal grid and vertical layer structures used in the Houston-Galveston-Brazoria ozone SIP Mid-Course Review (MCR) modeling.

Horizontal Grid Structure

The MM5 modeling domain is defined with the Lambert Conformal Conic map projection:

  First True Latitude (Alpha): 30°N
  Second True Latitude (Beta): 60°N
  Central Longitude (Gamma): 100°W
  Projection Origin: (100°W, 40°N)
  Spheroid: Perfect Sphere, Radius = 6370 km

The horizontal modeling domain grid structure consists a coarse grid continental domain and four nested subdomains: Regional Domain, East Texas Domain, Houston/Galveston/Brazoria-Beaumont/Port Arthur (HGBPA) Domain, and optional Houston/Galveston Bay (HG) Domain.

Domain Name Range (km) Number of Grid Points Cell Size (km)
Easting Northing Easting Northing Easting Northing
Continental Domain (-2808,2808) (-2268,2268) 53 43 108 108
Regional Domain (-324,1620) (-1728,216) 55 55 36 36
East Texas Domain (-72,1116) (-1548,-360) 100 100 12 12
HGBPA Domain (216,816) (-1356,-816) 151 136 4 4
HG Domain (424,520) (-1156,-1076) 97 81 1 1

HGB SIP MCR MM5 Modeling Domain
Domain

Vertical Layer Structure

LayerSigmaLayer Top
(m AGL)
Center
(m AGL)
Thickness
(m)
430.00020806.820362.1889.6
420.01019917.319341.41151.7
410.02518765.618117.91295.3
400.04517470.316918.81103.1
390.06516367.215773.21188.1
380.09015179.114662.71032.8
370.11514146.313602.41087.8
360.14513058.512577.6961.9
350.17512096.611596.61000.0
340.21011096.710587.91017.5
330.25010079.19622.9912.6
320.2909166.68752.3828.6
310.3308338.07958.1759.8
300.3707578.27269.5617.3
290.4056960.96671.3579.2
280.4406381.76108.8545.8
270.4755835.95577.7516.3
260.5105319.55108.7421.6
250.5404898.04695.9404.0
240.5704493.94299.9388.0
230.6004105.93919.3373.3
220.6303732.73552.8359.7
210.6603373.03199.5347.1
200.6903025.92858.2335.5
190.7202690.42528.1324.6
180.7502365.82234.4262.8
170.7752103.01974.9256.1
160.8001846.91721.9249.8
150.8251597.01475.1243.9
140.8501353.21281.4143.6
130.8651209.61138.8141.6
120.8801068.0998.1139.7
110.895928.3859.4137.8
100.910790.5745.090.9
90.920699.6654.690.1
80.930609.5564.989.3
70.940520.2476.088.5
60.950431.7387.887.8
50.960343.9300.487.0
40.970256.9213.786.3
30.980170.5127.785.6
20.99084.959.451.0
10.99633.916.933.9
01.0000.00.00.0
Note: AGL - Above ground level.
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