Development And Applications Of The Fully Coupled Model WRF-Chem-Smoke.

We present the development of a fully coupled model that treats the smoke emission and transport within the public WRF-Chem regional model. The model, called WRF-Chem-SMOKE, includes the smoke emission module that uses the satellite data to characterize the location of burned areas and quantify the smoke emission as a function of location and time. We will present the results of applying this model to simulate the cases of actual fires. The results will be presented that show the great capability of the model to simulate the actual fire emissions that are size- and composition- resolved. Various satellite data are used for the model validation and intercomparisons. We also use the data that were collected during several field campaigns to perform an extensive analysis of the spectral UV fluxes against measurements conducted using the Charged-coupled device Actinic Flux Spectroradiometer (CAFS) instruments as part of the instrument payload. The measurements provide profiles of spectrally resolved UV and visible fluxes. These data were compared against similar fluxes computed within the WRF-Chem-SMOKE model using the TUV radiative transfer code that is implemented within the WRF-Chem-SMOKE model. We will address the sources of the largest uncertainties that are involved in the intercomparison between modeled UV fluxes and measurements, including the selection of the initial size distribution and composition of smoke aerosols, initial height of the plume injection, and the role of meteorological conditions, among others.