Dr. Greg Carmichael

Gonzalo Ferrada

WRF-Chem 3.9.1 with tracers

The University of Iowa is providing air-quality forecasts to be used for flight planning and assesment of fires in the FIREX-AQ field experiment, their emissions and transport. We are using version 3.9.1 of WRF-Chem using MOZART-4 with aqueous chemistry as chemistry scheme and MOSAIC for aerosols (see more specs in the table below). This version also includes tracers with no lifetime for understanding the impact of processes such like smoke plume rise. We aknowledge to Dr. Rajesh Kumar and Dr. Gabriele Pfister from NCAR that provided us with this modified version. Dr. Greg Carmichael and Gonzalo Ferrada will be in field in Salina, KS during August 2019 to help with the forecast briefings.

We anticipate that our forecasts will not be available on August 14-15 due to maintenance of our servers.

Forecast system set up

Parameter Details
Horizontal grid spacement 8 km
Vertical layers 52 levels. 19 levels below 700 hPa.
Forecast period 96 hrs (4 days) with outputs every 3 hrs.
Initialization Everyday at 12 UTC
Website update Everyday around 11 PM(MT)/ midnight(CT)
West CONUS domain From 19 July to 17 August 2019
South CONUS domain From 18 August to 05 September 2019
Initial and boundary conditions
Meteorology GFS [ref ]
Chemistry and aerosols WACCM [ref ]
Biomass burning emissions QFED2 [ref ]
Anthropogenic emissions NEI2014v2 [ref ]
Biogenic emissions MEGAN [ref ]
Other model configurations
Chemical scheme MOZART-4 with Aqueous chemistry
Aerosol mechanism MOSAIC (4 bins)
Physics scheme Morrison 2-moment scheme
Convection scheme Grell & Freitas (2014)
PBL scheme Mellor-Yamada-Janjic TKE scheme
Radiation scheme RRTMG
Photolysis mechanism Madronich F-TUV