Dallas-Fort Worth Eight-Hour Ozone SIP Modeling (2006 Episode): MM5 Modeling Domain

Meteorological modeling (MM5) domain: horizontal grid and vertical layer structures for the Dallas-Fort Worth 8-hour ozone SIP revision (2006 episode).

Following are the MM5 horizontal grid and vertical layer structures used in the 2006 Dallas-Fort Worth eight-hour ozone SIP modeling (DFW8H2).

Horizontal Grid Structure
Vertical Layer Structure

Horizontal Grid Structure

The MM5 modeling domain is defined from 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 grid structure consists of a coarse grid continental domain and four nested subdomains: the Continental Domain, U.S. Domain, South U.S. Domain, and East Texas Domain.

Domain Name	Range (km)		Number of Grid Points		Cell Size (km)		Domain Number in MM5
Domain Name	Easting	Northing	Easting	Northing	Easting	Northing	Domain Number in MM5
Continental Domain	(-2808,2808)	(-2268,2268)	53	43	108	108	1
U.S. Domain	(-1296,2160)	(-1728,972)	97	76	36	36	2
South U.S. Domain	(-648,1080)	(-1548,-360)	145	100	12	12	3
East Texas Domain	(72,732)	(-1380,-648)	166	184	4	4	4

DFW8H2 MM5 Modeling Domain

Vertical Layer Structure

Layer	Sigma	Layer Top (m AGL)	Center (m AGL)	Thickness (m)
43	0.000	20806.8	20362.1	889.6
42	0.010	19917.3	19341.4	1151.7
41	0.025	18765.6	18117.9	1295.3
40	0.045	17470.3	16918.8	1103.1
39	0.065	16367.2	15773.2	1188.1
38	0.090	15179.1	14662.7	1032.8
37	0.115	14146.3	13602.4	1087.8
36	0.145	13058.5	12577.6	961.9
35	0.175	12096.6	11596.6	1000.0
34	0.210	11096.7	10587.9	1017.5
33	0.250	10079.1	9622.9	912.6
32	0.290	9166.6	8752.3	828.6
31	0.330	8338.0	7958.1	759.8
30	0.370	7578.2	7269.5	617.3
29	0.405	6960.9	6671.3	579.2
28	0.440	6381.7	6108.8	545.8
27	0.475	5835.9	5577.7	516.3
26	0.510	5319.5	5108.7	421.6
25	0.540	4898.0	4695.9	404.0
24	0.570	4493.9	4299.9	388.0
23	0.600	4105.9	3919.3	373.3
22	0.630	3732.7	3552.8	359.7
21	0.660	3373.0	3199.5	347.1
20	0.690	3025.9	2858.2	335.5
19	0.720	2690.4	2528.1	324.6
18	0.750	2365.8	2234.4	262.8
17	0.775	2103.0	1974.9	256.1
16	0.800	1846.9	1721.9	249.8
15	0.825	1597.0	1475.1	243.9
14	0.850	1353.2	1281.4	143.6
13	0.865	1209.6	1138.8	141.6
12	0.880	1068.0	998.1	139.7
11	0.895	928.3	859.4	137.8
10	0.910	790.5	745.0	90.9
9	0.920	699.6	654.6	90.1
8	0.930	609.5	564.9	89.3
7	0.940	520.2	476.0	88.5
6	0.950	431.7	387.8	87.8
5	0.960	343.9	300.4	87.0
4	0.970	256.9	213.7	86.3
3	0.980	170.5	127.7	85.6
2	0.990	84.9	59.4	51.0
1	0.996	33.9	16.9	33.9
0	1.000	0.0	0.0	0.0

Note: AGL - above ground level.

Document Actions

Print this