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You are here: Home / Air Quality / Air Modeling / Air Modeling Data / Dallas-Fort Worth 8-Hour Ozone SIP Modeling (2006 Episode) / Dallas-Fort Worth Eight-Hour Ozone SIP Modeling (2006 Episode): CAMx Modeling Domain

Dallas-Fort Worth Eight-Hour Ozone SIP Modeling (2006 Episode): CAMx Modeling Domain

Photochemical model CAMx modeling domain: horizontal grid and vertical layer structures for the Dallas-Fort Worth eight-hour ozone SIP revision (Episode).

Following are the CAMx horizontal grid and vertical layer structures used for the 2006 Dallas-Fort Worth eight-hour ozone SIP modeling (DFW8H2).

Horizontal Grid Structure

The CAMx modeling domain is defined in the Lambert Conformal Conic map projection:

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

The horizontal modeling domain structure consists of a coarse-grid East US domain and nested fine-grid subdomains: East Texas subdomain, and Dallas-Fort Worth (DFW) subdomain.

Domain Name Range (km) Number of Cells Cell Size (km) Name in
CAMx
Easting Northing Easting Northing Easting Northing
East US Domain (-108,2376) (-1584,828) 69 67 36 36 eus_36km
East Texas Subdomain (-12,1056) (-1488,-420) 89 89 12 12 etx_12km
DFW Subdomain (140,436) (-940,-680) 74 65 4 4 dfw_04km
DFW CAMx Modeling Domain
DFW8H2 CAMx Domain

Vertical Layer Structure

MM5
Layer
Layer Top
(m AGL)
CAMx
Layer
Layer Center
(m AGL)
Thickness
(m)
3815179.12813637.93082.5
3612096.62710631.62930.0
329166.6268063.82205.7
296960.9256398.41125.0
275835.9245367.0937.9
254898.0234502.2791.6
234106.4223739.9733.0
213373.5213199.9347.2
203026.3202858.3335.9
192690.4192528.3324.3
182366.1182234.7262.8
172103.3171975.2256.2
161847.2161722.2249.9
151597.3151475.3243.9
141353.4141281.6143.6
131209.8131139.0141.6
121068.212998.3139.7
11928.511859.5137.8
10790.610745.290.9
9699.79654.790.1
8609.78565.089.3
7520.37476.188.5
6431.86387.987.8
5344.05300.587.1
4256.94213.886.3
3170.63127.885.6
285.0259.451.0
133.9117.033.9
AGL - Above ground level.
CAMx LayersCAMx Layers (Lower 21)