Development of an improved urban airshed modeling system

Technical Report · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6999464

Godowitch, J M; Tang, R T; Newsom, J S

A research and development effort to improve certain physical processes simulated in the Urban Airshed Model (UAM) processor and model programs, and to update the computer software is described. The UAM is an Eulerian photochemical grid model designed to simulate the relevant physical and chemical processes leading to ozone formation over urban-scale domains. An important task is the development of a comprehensive, meteorological processor program capable of generating several model input data files. Key modules include algorithms for computing the three-dimensional wind, temperature, and water vapor fields, surface energy budget fluxes, mixing heights, vertical eddy exchange coefficients, three-dimensional photolysis rates, and pollutant deposition velocities. The UAM model code has been updated to accept the meteorological processor data files and has been consolidated due to the removal of computational routines for dry deposition and exchange coefficients. Test runs to verify the correct implementation of code changes and to assess the impacts of new methods on predicated concentrations are described. The evaluation plans for the upgraded modeling system and an intercomparison of results with the regulatory UAM model using the Southern California Air Quality field measurements are also outlined.

• Research Organization: Computer Sciences Corp., Research Triangle Park, NC (United States)
• OSTI ID: 6999464
• Report Number(s): PB-93-120889/XAB
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
99 GENERAL AND MISCELLANEOUS
990301 -- Information Handling-- Data Handling-- (1992-)
ABSTRACTS
AIR POLLUTION
AIR QUALITY
ALGORITHMS
ATMOSPHERIC CHEMISTRY
CALIFORNIA
CHEMICAL REACTIONS
CHEMISTRY
COMPUTERIZED SIMULATION
DECOMPOSITION
DEPOSITION
DEVELOPED COUNTRIES
DOCUMENT TYPES
ENERGY
ENVIRONMENTAL QUALITY
FLUIDS
FREE ENERGY
GASES
LEADING ABSTRACT
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
METEOROLOGY
NORTH AMERICA
OZONE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PHYSICAL PROPERTIES
POLLUTION
REMOVAL
SIMULATION
STANDARDS
STATISTICAL MODELS
SURFACE ENERGY
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
THREE-DIMENSIONAL CALCULATIONS
URBAN AREAS
USA
VAPORS
WATER VAPOR
WIND