S. R. Freitas

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 (2009)

S. R. Freitas, K. M. Longo, R. Chatfield, P. Silva Dias, P. Artaxo, ...

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...

A comparison study of regional atmospheric simulations with an elastic backscattering Lidar and Sunphotometry in an urban area (2009)

E. Landulfo, S. R. Freitas, K. M. Longo, S. T. Uehara, P. Sawamura

We describe a comparison study of aerosol optical thickness (AOT) from numerical simulations using a regional atmospheric model with an elastic backscattering lidar operating at 532 nm and a...

Effect of biomass burning on marine stratocumulus clouds off the California coast (2009)

J. Brioude, O. R. Cooper, G. Feingold, M. Trainer, S. R. Freitas, D. Kowal, ...

Aerosol-cloud interactions are considered to be one of the most important and least known forcings in the climate system. Biomass burning aerosols are of special interest due to their radiative...

Technical Note: Sensitivity of 1-D smoke plume rise models to the inclusion of environmental wind drag (2009)

S. R. Freitas, K. M. Longo, J. Trentmann, D. Latham

We revisit the parameterization of the vertical transport of hot gases and particles emitted from biomass burning, described in Freitas et al. (2007), to include the effects of environmental wind on...

A comparison study of regional atmospheric simulations with an elastic backscattering Lidar and sunphotometry in an urban area (2009)

E. Landulfo, S. R. Freitas, K. M. Longo, S. T. Uehara, P. Sawamura

We describe a comparison study of Aerosol Optical Thickness (AOT) from numerical simulations using a regional atmospheric model with an elastic backscattering lidar operating at 532 nm and a...

OMI observations of the anomalous 2008 Southern Hemisphere biomass burning season (2009)

O. Torres, Z. Chen, H. Jethva, C. Ahn, S. R. Freitas, P. K. Bhartia

The 2008 season of biomass burning in the Southern Hemisphere was marked by a significant reduction in the number of fires in South America and, therefore, a large drop of the atmospheric load of...

Evaluation of the CPTEC/AGCM wind forecasts during the hurricane Catarina occurrence (2008)

Santos, A. F., Mendonça, A. M., Bonatti, J. P., Kubota, P. Y., Freitas, S. R., ...

In March 2004 occurred the first hurricane registered at South Atlantic Ocean. The system named Catarina begun as an extratropical cyclone and remained quasi-stationary some days over the South...

Evaluation of the CPTEC/AGCM wind forecasts during the hurricane Catarina occurrence (2008)

Santos, A. F., Mendonça, A. M., Bonatti, J. P., Kubota, P. Y., Freitas, S. R., ...

In March 2004 occurred the first hurricane registered at South Atlantic Ocean. The system named Catarina begun as an extratropical cyclone and remained quasi-stationary some days over the South...

Evaluation of the CPTEC/AGCM wind forecasts during the hurricane Catarina occurrence (2008)

A. F. Santos, A. M. Mendonça, J. P. Bonatti, P. Y. Kubota, S. R. Freitas, ...

In March 2004 occurred the first hurricane registered at South Atlantic Ocean. The system named Catarina begun as an extratropical cyclone and remained quasi-stationary some days over the South...

Modeling the effect of plume-rise on the transport of carbon monoxide over Africa with NCAR CAM (2008)

H. Guan, R. B. Chatfield, S. R. Freitas, R. W. Bergstrom, K. M. Longo

We investigated the effects of fire-induced plume-rise on the simulation of carbon monoxide (CO) over Africa and its export during SAFARI 2000 using the NCAR Community Atmosphere Model (CAM) with a...

Corrigendum to "Modeling the effect of plume-rise on the transport of carbon monoxide over Africa with NCAR CAM" published in Atmos. Chem. Phys., 8, 6801–6812, 2008 (2008)

H. Guan, R. B. Chatfield, S. R. Freitas, R. W. Bergstrom, K. M. Longo

No abstract available.

A METHOD TO DETERMINE THE MINIMUM NUMBER OF LITTERTRAPS IN LITTERFALL STUDIES (2007)

Finotti R, S. R. Freitas, R. Cerqueira, M. V. Vieira, Ricardo Finotti, Simone Rodrigues Freitas, ...

One of the most important methodological problems to estimate fine litterfall is the adequate number of litter traps used. In this study we propose a pre-sampling method to determine the minimum...

Modeling the effect of plume-rise on the transport of carbon monoxide over Africa and its exports with NCAR CAM (2007)

Guan, H., Chatfield, R. B., Freitas, S. R., Bergstrom, R. W., Longo, K. M.

We investigated the effects of fire-induced plume-rise on the predicted export of carbon monoxide (CO) over Africa during SAFARI 2000 using the NCAR Community Atmosphere Model (CAM) with a CO tracer...

The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) ? Part 2: Model sensitivity to the biomass burning inventories (2007)

Longo, K. M., Freitas, S. R., Setzer, A., Prins, E., Artaxo, P., Andreae, M. O.

We describe an estimation technique for biomass burning emissions in South America based on a combination of remote sensing fire products and field observations. For each fire pixel detected by...

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 (2007)

Freitas, S. R., Longo, K. M., Chatfield, R., Silva Dias, P., Artaxo, P., ...

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...

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2007)

Freitas, S. R., Longo, K. M., Chatfield, R., Latham, D., Andreae, M. O., ...

We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport...

Modeling the effect of plume-rise on the transport of carbon monoxide over Africa and its exports with NCAR CAM (2007)

Guan, H., Chatfield, R. B., Freitas, S. R., Bergstrom, R. W., Longo, K. M.

We investigated the effects of fire-induced plume-rise on the predicted export of carbon monoxide (CO) over Africa during SAFARI 2000 using the NCAR Community Atmosphere Model (CAM) with a CO tracer...

The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) ? Part 2: Model sensitivity to the biomass burning inventories (2007)

Longo, K. M., Freitas, S. R., Setzer, A., Prins, E., Artaxo, P., Andreae, M. O.

We describe an estimation technique for biomass burning emissions in South America based on a combination of remote sensing fire products and field observations. For each fire pixel detected by...

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 (2007)

Freitas, S. R., Longo, K. M., Chatfield, R., Silva Dias, P., Artaxo, P., ...

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...

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2007)

Freitas, S. R., Longo, K. M., Chatfield, R., Latham, D., Andreae, M. O., ...

We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport...

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2007)

Freitas, S. R., Longo, K. M., Chatfield, R., Latham, D., Andreae, M. O., ...

The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) – Part 2: Model sensitivity to the biomass burning inventories (2007)

Longo, K. M., Freitas, S. R., Setzer, A., Prins, E., Artaxo, P., Andreae, M. O.

O.: The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System. Part 2: model sensitivity to the biomass burning inventories, Atmos (2007)

K. M. Longo, S. R. Freitas, A. Setzer, E. Prins, P. Artaxo, M. O. Andreae

We describe an estimation technique for biomass burning emissions in South America based on a combination of remote sensing fire products and field observations. For each fire pixel detected by...

(CATT-BRAMS) – Part 2: Model sensitivity (2007)

K. M. Longo, S. R. Freitas, A. Setzer, E. Prins, P. Artaxo, M. O. Andreae

Transport model to the Brazilian

Atmospheric Chemistry and Physics Discussions (2007)

S. R. Freitas, K. M. Longo, R. Chatfield, P. Silva Dias, P. Artaxo, ...

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...

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2007)

S. R. Freitas, K. M. Longo, R. Chatfield, D. Latham, M. O. Andreae, ...

We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport...

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 (2007)

S. R. Freitas, K. M. Longo, R. Chatfield, P. Silva Dias, P. Artaxo, ...

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...

The Coupled Aerosol and Tracer Transport model to the Brazilian developments on the Regional Atmospheric Modeling System (CATT-BRAMS) – Part 2: Model sensitivity to the biomass burning inventories (2007)

K. M. Longo, S. R. Freitas, A. Setzer, E. Prins, P. Artaxo, M. O. Andreae

We describe an estimation technique for biomass burning emissions in South America based on a combination of remote sensing fire products and field observations. For each fire pixel detected by...

Modeling the effect of plume-rise on the transport of carbon monoxide over Africa and its exports with NCAR CAM (2007)

H. Guan, R. B. Chatfield, S. R. Freitas, R. W. Bergstrom, K. M. Longo

We investigated the effects of fire-induced plume-rise on the predicted export of carbon monoxide (CO) over Africa during SAFARI 2000 using the NCAR Community Atmosphere Model (CAM) with a CO tracer...

Tijuca National Park: two pioneering restorationist initiatives in Atlantic forest in southeastern Brazil (2006)

Freitas,S. R., Neves,C. L., Chernicharo,P.

As a contribution to the environmental history of the Tijuca National Park, we report on two pioneering restorationist initiatives and list its the mammal species now found in this urban park. The...

Impact of including the plume rise of vegetation fires in numerical simulations of associated atmospheric pollutants (2006)

Freitas, S. R., Longo, K. M., Andreae, M. O.

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2006)

Freitas, S. R., Longo, K. M., Chatfield, R., Latham, D., Andreae, M. O., ...

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2006)

Freitas, S. R., Longo, K. M., Chatfield, R., Latham, D., Andreae, M. O., ...

We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport...

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2006)

Freitas, S. R., Longo, K. M., Chatfield, R., Latham, D., Andreae, M. O., ...

We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport...

Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models (2006)

S. R. Freitas, K. M. Longo, R. Chatfield, D. Latham, M. O. Andreae, ...

We describe and begin to evaluate a parameterization to include the vertical transport of hot gases and particles emitted from biomass burning in low resolution atmospheric-chemistry transport...

Sensitivity studies on the photolysis rates calculation in Amazonian atmospheric chemistry ? Part I: The impact of the direct radiative effect of biomass burning aerosol particles (2005)

Albuquerque, L. M. M., Longo, K. M., Freitas, S. R., Tarasova, T., Plana Fattori, A., Nobre, C., ...

The impact of the direct radiative effect of the aerosol particles on the calculation of the photolysis rates and consequently on the atmospheric chemistry in regional smoke clouds due to biomass...

Sensitivity studies on the photolysis rates calculation in Amazonian atmospheric chemistry ? Part I: The impact of the direct radiative effect of biomass burning aerosol particles (2005)

Albuquerque, L. M. M., Longo, K. M., Freitas, S. R., Tarasova, T., Plana Fattori, A., Nobre, C., ...

The impact of the direct radiative effect of the aerosol particles on the calculation of the photolysis rates and consequently on the atmospheric chemistry in regional smoke clouds due to biomass...

A device and standard variables to describe microhabitat structure of small mammals based on plant cover (2002)

FREITAS,S. R., CERQUEIRA,R., VIEIRA,M. V.

Studies quantifying habitat structure generally use several instruments. This paper aims to propose a new and efficient device to characterize microhabitat structure of small mammals. Seven...

Transport of biomass burning smoke to the upper troposphere by deep convection in the equatorial region (2001)

Andreae, M O, Artaxo, P, Fischer, H, Freitas, S R, Gregoire, J M, Hansel, A, ...

A convective kinematic trajectory technique for low-resolution atmospheric models (2000)

Freitas, S. R., Dias, P. L. Silva, Longo, K. M., Artaxo, P., Andreae, M. O., ...

A new study method of microhabitat structure of small mammals (1999)

CERQUEIRA,R., FREITAS,S. R.

The variables in habitat studies are usually transformed in such a way that they become abstractions and intuition is lost. We tested a new method for the analysis of habitat using data collected in...