||AERSURFACE user's guide.
||Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
||U. S. Environmental Protection Agency, Office of Air Quality Planning Standards, Air Quality Assessment Division, Air Quality Modeling Group,
Geospatial data--United States ;
Air quality dispersion models ;
Diffusion modeling ;
Error handling ;
File descriptions ;
Atmospheric pollution ;
Meteorological data ;
Users guide ;
User instructions ;
Tables (Data) ;
Land cover ;
AERSURFACE tool ;
AERMET meteorological processor ;
AERSURFACE calculation methods ;
Interactive user prompts ;
Boundary layer flow
||Research Triangle Park Library/RTP, NC
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 v. (various paging) : ill., charts ; 28 cm.
||When applying the AERMET meteorological processor (EPA, 2004a) to process meteorological data for the AERMOD model (EPA, 2004b), the user must determine appropriate values for three surface characteristics: surface roughness length (zo), albedo (r), and Bowen ratio (Bo). The surface roughness length is related to the height of obstacles to the wind flow and is, in principle, the height at which the mean horizontal wind speed is zero based on a logarithmic profile. The surface roughness length influences the surface shear stress and is an important factor in determining the magnitude of mechanical turbulence and the stability of the boundary layer. The albedo is the fraction of total incident solar radiation reflected by the surface back to space without absorption. The daytime Bowen ratio, an indicator of surface moisture, is the ratio of sensible heat flux to latent heat flux and, together with albedo and other meteorological observations, is used for determining planetary boundary layer parameters for convective conditions driven by the surface sensible heat flux. Further details regarding the AERMOD model formulations and their dependence on surface characteristics are provided in Cimorelli, et al. (2004). The AERSURFACE tool has been developed to aid users in obtaining realistic and reproducible surface characteristic values, including albedo, Bowen ratio, and surface roughness length, for input to AERMET. The tool uses publicly available national land cover datasets and look-up tables of surface characteristics that vary by land cover type and season. This users guide provides a technical description of the AERSURFACE tool, including information on the data used by AERSURFACE to provide these surface characteristics for AERMET. Detailed user instructions for application of AERSURFACE are also provided.
||EPA project officer: Roger W. Brode. "January 2008." "EPA-454/B-08-001." PB2008-111717.
||Research Triangle Park, N.C. :
||Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at email@example.com. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
||Also available via the World Wide Web. Location last confirmed 8/14/08.
|Corporate Au Added Ent
||United States Environmental Protection Agency Office of Air Quality Planning and Standards.
|PUB Date Free Form
||68A; 55B; 55C
|OCLC Time Stamp
|OCLC Rec Leader
||01175nam 2200301Ka 45020