WRF-Chem

Model name

WRF-CHEM

Full model name

Weather Research and Forecasting (WRF) model coupled with Chemistry

URL

http://ruc.noaa.gov/wrf/WG11/

Model description summary

The WRFChem is an online model, completely embedded within WRF model. The model simulates the emission, transport, mixing, and chemical transformation of trace gases and aerosols simultaneously with the meteorology. The model is used for investigation of regional-scale air quality, field program analysis, and cloud-scale interactions between clouds and chemistry.
The development of WRF-Chem is a collaborative effort among the community. NOAA/ESRL scientists are the leaders and caretakers of the code. The Official WRF-Chem web page is located at the NOAA web site.
The Chemistry Package consists of the following components:

  • Dry deposition, coupled with the soil/vegetation scheme.

  • Aqueous phase chemistry coupled to some of the microphysics and aerosol schemes.

  • Four choices for biogenic emissions:
    • No biogenic emissions.
    • Online calculation of biogenic emissions (as in Simpson, et al. 1995 and Guenther et al. 1994) includes emissions of isoprene, monoterpenes, and nitrogen emissions by soil.
    • Online modification of user specified biogenic emissions - such as the EPA Biogenic Emissions Inventory System (BEIS) version 3.13. The user must provide the emissions data for their own domain in the proper WRF data file format.
    • Online calculation of biogenic emissions using the MEGAN v2 biogenic emissions routine.

  • Two choices for anthropogenic emissions:
    • No anthropogenic emissions.
    • User specified Anthropogenic emissions - such as those available from the EPA NEI-99 data inventory. The user must provide the emissions data for their own domain in the proper WRF data file format. To help a user understand the process, emissions data sets and a program is available to generate anthropogenic emissions for your domain, but care should be taken in its use as the underlying assumptions in the program might not be valid for a user's particular case.

  • Two choices for gas-phase chemical reaction calculations.
    • The RADM2 chemical mechanism.
    • The CBM-Z mechanism.

  • Several choices for gas-phase chemical reaction calculations through the use of the Kinetic Pre-Processor, or KPP. The equation files (using Rosenbrock type solvers) currently available are for:
    • The RADM2 chemical mechanism.
    • The RACM mechanism.
    • The RACM-MIM mechanism.
    • The CB4 mechanism (experimental).
    • The NMHC9 mechanism (experimental).
    • The SAPRC-99 mechanism.
    • The CRIMech mechanism.

  • Three choices for Photolysis schemes:
    • Madronich scheme coupled with hydrometeors, aerosols and convective parameterizations.
    • Fast-J Photolysis scheme coupled with hydrometeors, aerosols and convective parameterizations.
    • FTUV scheme scheme coupled with hydrometeors, aerosols and convective parameterizations.

  • Several choices for aerosol schemes:
    • The Modal Aerosol Dynamics Model for Europe - MADE/SORGAM
    • The Model for Simulating Aerosol Interactions and Chemistry (MOSAIC - 4 or 8 bins) sectional model aerosol parameterization
    • The GOCART aerosol model (experimental). aerosol parameterization
    • The MAM 3 and 7 modal aerosol scheme to run with CAM physics

  • A tracer transport option in which the chemical mechanism, deposition, etc. has been turned off. The user must provide the emissions data for their own domain in the proper WRF data file format for this option.

Possible applications of the current modelling system:

  • Prediction and simulation of weather, or regional or local climate and air quality
  • Coupled weather prediction/dispersion model to simulate release and transport of constituents Coupled weather/dispersion/air quality model with full interaction of chemical species with prediction of O3 and UV radiation, as well as PM model type and dimension

Refereences:

http://ruc.noaa.gov/wrf/WG11/References/WRF-Chem.references.htm

última atualização a 16-04-2014
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