The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) - Part 1: Model description and evaluation
Article, Other literature type
Freitas, S. R.
Longo, K. M.
Dias, M. A. F. Silva
Dias, P. Silva
Andreae, M. O.
Rodrigues, L. F.
- Publisher: COPERNICUS GESELLSCHAFT MBH
ATMOSPHERIC CHEMISTRY AND PHYSICS
(issn: 1680-7316, eissn: 1680-7324)
[ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere | SMOKE | PARAMETERIZATION | RESOLUTION | OPTICAL-PROPERTIES | CONVECTION | AMAZONIA | CARBON | FIRE | SOUTH-AMERICA | EMISSIONS | Meteorology & Atmospheric Sciences
arxiv: Physics::Atmospheric and Oceanic Physics
We introduce the Coupled Aerosol and Tracer Transport model to the Brazilian
developments on the Regional Atmospheric Modeling System (CATT-BRAMS).
CATT-BRAMS is an on-line transport model fully consistent with the simulated
atmospheric dynamics. Emission sources from biomass burning and
urban-industrial-vehicular activities for trace gases and from biomass
burning aerosol particles are obtained from several published datasets and
remote sensing information. The tracer and aerosol mass concentration
prognostics include the effects of sub-grid scale turbulence in the
planetary boundary layer, convective transport by shallow and deep moist
convection, wet and dry deposition, and plume rise associated with
vegetation fires in addition to the grid scale transport. The radiation
parameterization takes into account the interaction between the simulated
biomass burning aerosol particles and short and long wave radiation. The
atmospheric model BRAMS is based on the Regional Atmospheric Modeling System
(RAMS), with several improvements associated with cumulus convection
representation, soil moisture initialization and surface scheme tuned for
the tropics, among others. In this paper the CATT-BRAMS model is used to
simulate carbon monoxide and particulate material (PM<sub>2.5</sub>) surface fluxes and
atmospheric transport during the 2002 LBA field campaigns, conducted during
the transition from the dry to wet season in the southwest Amazon Basin.
Model evaluation is addressed with comparisons between model results and
near surface, radiosondes and airborne measurements performed during the
field campaign, as well as remote sensing derived products. We show the
matching of emissions strengths to observed carbon monoxide in the LBA
campaign. A relatively good comparison to the MOPITT data, in spite of the
fact that MOPITT a priori assumptions imply several difficulties, is also