`Sensitivity of AERSURFACE Results to Study Area and Location,` presented at the Air & Waste Management Association`s annual conference


The United States Environmental Protection Agency (U.S. EPA) released a new version of theAERSURFACE tool on January 9, 2008. AERSURFACE is used to develop direction-specificestimates of surface characteristics (albedo, Bowen ratio, and surface roughness) for use as oneinput in AERMET to produce meteorological data sets that can be used in regulatory dispersionmodeling analyses using AERMOD. AERSURFACE uses the land use characteristics of thearea surrounding the meteorological data collection site or the model study site to determine theappropriate surface characteristics for input into AERMET. In some cases, land use can varysignificantly over short distances; therefore, the exact location of the center of theAERSURFACE study region and the radius of the study region can be important inputs thataffect the surface characteristics that are output by AERSURFACE. Variations in surfaceroughness output by AERSURFACE with differences in study center and study radius areexamined in this paper.

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