Evolution of biomass burning aerosol properties from an agricultural fire in southern Africa

2003 ◽  
Vol 30 (15) ◽  
Author(s):  
Steven J. Abel ◽  
Jim M. Haywood ◽  
Eleanor J. Highwood ◽  
Jia Li ◽  
Peter R. Buseck
Keyword(s):  
Biomass Burning ◽  
Southern Africa ◽  
Biomass Burning Aerosol ◽  
Aerosol Properties

scholarly journals Modification of Local Urban Aerosol Properties by Long-Range Transport of Biomass Burning Aerosol

2018 ◽  
Vol 10 (3) ◽  
pp. 412 ◽  
Author(s):  
Iwona Stachlewska ◽  
Mateusz Samson ◽  
Olga Zawadzka ◽  
Kamila Harenda ◽  
Lucja Janicka ◽  
...  
Keyword(s):  
Long Range ◽  
Biomass Burning ◽  
Long Range Transport ◽  
Urban Aerosol ◽  
Range Transport ◽  
Biomass Burning Aerosol ◽  
Aerosol Properties

scholarly journals Direct and semi-direct impacts of absorbing biomass burning aerosol on the climate of southern Africa: a Geophysical Fluid Dynamics Laboratory GCM sensitivity study

2010 ◽  
Vol 10 (20) ◽  
pp. 9819-9831 ◽  
Author(s):  
C. A. Randles ◽  
V. Ramaswamy
Keyword(s):  
Water Vapor ◽  
Biomass Burning ◽  
Southern Africa ◽  
Climate Impacts ◽  
Atmospheric Water Vapor ◽  
Geophysical Fluid Dynamics Laboratory ◽  
Atmospheric Water ◽  
Surface Cooling ◽  
Low Level ◽  
Biomass Burning Aerosol

Abstract. Tropospheric aerosols emitted from biomass burning reduce solar radiation at the surface and locally heat the atmosphere. Equilibrium simulations using an atmospheric general circulation model (GFDL AGCM) indicate that strong atmospheric absorption from these particles can cool the surface and increase upward motion and low-level convergence over southern Africa during the dry season. These changes increase sea level pressure over land in the biomass burning region and spin-up the hydrologic cycle by increasing clouds, atmospheric water vapor, and, to a lesser extent, precipitation. Cloud increases serve to reinforce the surface radiative cooling tendency of the aerosol. Conversely, if the climate over southern Africa were hypothetically forced by high loadings of scattering aerosol, then the change in the low-level circulation and increased subsidence would serve to decrease clouds, precipitation, and atmospheric water vapor. Surface cooling associated with scattering-only aerosols is mitigated by warming from cloud decreases. The direct and semi-direct climate impacts of biomass burning aerosol over southern Africa are sensitive to the total amount of aerosol absorption and how clouds change in response to the aerosol-induced heating of the atmosphere.

scholarly journals Evaluation of biomass burning aerosols in the HadGEM3 climate model with observations from the SAMBBA field campaign

2016 ◽  
Author(s):  
B. T. Johnson ◽  
J. M. Haywood ◽  
J. M. Langridge ◽  
E. Darbyshire ◽  
W. T. Morgan ◽  
...  
Keyword(s):  
Size Distribution ◽  
Biomass Burning ◽  
Climate Model ◽  
Single Scattering ◽  
Single Scattering Albedo ◽  
Carbonaceous Aerosol ◽  
Aerosol Mass ◽  
Vertical Distributions ◽  
Biomass Burning Aerosol ◽  
Aerosol Properties

Abstract. We present observations of biomass burning aerosol from the South American Biomass Burning Analysis (SAMBBA) and other measurement campaigns, and use these to evaluate the representation of biomass burning aerosol properties and processes in a state-of-the-art climate model. The evaluation includes detailed comparisons with aircraft and ground data, along with remote sensing observations from MODIS and AERONET. We demonstrate several improvements to aerosol properties following the implementation of the GLOMAP-mode modal aerosol scheme in the HadGEM3 climate model. This predicts the particle size distribution, composition and optical properties, giving increased accuracy in the representation of aerosol properties and physical-chemical processes over the CLASSIC bulk aerosol scheme previously used in HadGEM2. Although both models give similar regional distributions of carbonaceous aerosol mass and Aerosol Optical Depth (AOD), GLOMAP-mode is better able to capture the observed size distribution, single scattering albedo, and Ångström exponent across different tropical biomass burning source regions. Both aerosol schemes overestimate the uptake of water compared to recent observations, CLASSIC more so than GLOMAP-mode, leading to a likely overestimation of aerosol scattering, AOD and single scattering albedo at high relative humidity. Observed aerosol vertical distributions were well captured when biomass burning aerosol emissions were injected uniformly from the surface to 3 km. Finally, good agreement between observed and modelled AOD was gained only after scaling up GFED3 emissions by a factor of 1.6 for CLASSIC and 2.0 for GLOMAP-mode. We attribute this difference in scaling factor mainly to different assumptions for the growth of aerosol mass during ageing via oxidation and condensation of organics.

scholarly journals Multiple scattering in a dense aerosol atmosphere

2012 ◽  
Vol 5 (1) ◽  
pp. 881-907 ◽  
Author(s):  
S. Mukai ◽  
T. Yokomae ◽  
I. Sano ◽  
M. Nakata ◽  
A. Kokhanovsky
Keyword(s):  
Radiative Transfer ◽  
Multiple Scattering ◽  
Radiation Field ◽  
Biomass Burning ◽  
Optical Thickness ◽  
Dust Storm ◽  
Efficient Algorithm ◽  
Biomass Burning Aerosol ◽  
Simulation Scheme ◽  
Aerosol Properties

Abstract. This study was designed to develop an efficient algorithm to retrieve aerosol characteristics in aerosol events, which are associated with dense concentrations of aerosols in the atmosphere, such as a dust storm or a biomass burning plume. The idea of successive scattering of light is reviewed based on the theory of radiative transfer. Then derivation of the method of successive order of scattering (MSOS) is interpreted in detail, and it is shown that MSOS is available for a simulation scheme in the dense radiation field being used to retrieve aerosol properties in the event with the high optical thickness. Finally our algorithms are practically applied for the biomass burning aerosol event over the Amazon using Aqua/MODIS data.

scholarly journals Evaluation of biomass burning aerosols in the HadGEM3 climate model with observations from the SAMBBA field campaign

2016 ◽  
Vol 16 (22) ◽  
pp. 14657-14685 ◽  
Author(s):  
Ben T. Johnson ◽  
James M. Haywood ◽  
Justin M. Langridge ◽  
Eoghan Darbyshire ◽  
William T. Morgan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Size Distribution ◽  
Biomass Burning ◽  
Climate Model ◽  
Single Scattering ◽  
Single Scattering Albedo ◽  
Aerosol Mass ◽  
Biomass Burning Aerosol ◽  
Aerosol Properties

Abstract. We present observations of biomass burning aerosol from the South American Biomass Burning Analysis (SAMBBA) and other measurement campaigns, and use these to evaluate the representation of biomass burning aerosol properties and processes in a state-of-the-art climate model. The evaluation includes detailed comparisons with aircraft and ground data, along with remote sensing observations from MODIS and AERONET. We demonstrate several improvements to aerosol properties following the implementation of the Global Model for Aerosol Processes (GLOMAP-mode) modal aerosol scheme in the HadGEM3 climate model. This predicts the particle size distribution, composition, and optical properties, giving increased accuracy in the representation of aerosol properties and physical–chemical processes over the Coupled Large-scale Aerosol Scheme for Simulations in Climate Models (CLASSIC) bulk aerosol scheme previously used in HadGEM2. Although both models give similar regional distributions of carbonaceous aerosol mass and aerosol optical depth (AOD), GLOMAP-mode is better able to capture the observed size distribution, single scattering albedo, and Ångström exponent across different tropical biomass burning source regions. Both aerosol schemes overestimate the uptake of water compared to recent observations, CLASSIC more so than GLOMAP-mode, leading to a likely overestimation of aerosol scattering, AOD, and single scattering albedo at high relative humidity. Observed aerosol vertical distributions were well captured when biomass burning aerosol emissions were injected uniformly from the surface to 3 km. Finally, good agreement between observed and modelled AOD was gained only after scaling up GFED3 emissions by a factor of 1.6 for CLASSIC and 2.0 for GLOMAP-mode. We attribute this difference in scaling factor mainly to different assumptions for the water uptake and growth of aerosol mass during ageing via oxidation and condensation of organics. We also note that similar agreement with observed AOD could have been achieved with lower scaling factors if the ratio of organic carbon to primary organic matter was increased in the models toward the upper range of observed values. Improved knowledge from measurements is required to reduce uncertainties in emission ratios for black carbon and organic carbon, and the ratio of organic carbon to primary organic matter for primary emissions from biomass burning.

scholarly journals Aerosol Characterization during the Summer 2017 Huge Fire Event on Mount Vesuvius (Italy) by Remote Sensing and In Situ Observations

2021 ◽  
Vol 13 (10) ◽  
pp. 2001
Author(s):  
Antonella Boselli ◽  
Alessia Sannino ◽  
Mariagrazia D’Emilio ◽  
Xuan Wang ◽  
Salvatore Amoruso
Keyword(s):  
Remote Sensing ◽  
Biomass Burning ◽  
Ground Level ◽  
Large Area ◽  
Fire Event ◽  
Near Surface ◽  
Mean Values ◽  
Microphysical Properties ◽  
Observational Site ◽  
Biomass Burning Aerosol

During the summer of 2017, multiple huge fires occurred on Mount Vesuvius (Italy), dispersing a large quantity of ash in the surrounding area ensuing the burning of tens of hectares of Mediterranean scrub. The fires affected a very large area of the Vesuvius National Park and the smoke was driven by winds towards the city of Naples, causing daily peak values of particulate matter (PM) concentrations at ground level higher than the limit of the EU air quality directive. The smoke plume spreading over the area of Naples in this period was characterized by active (lidar) and passive (sun photometer) remote sensing as well as near-surface (optical particle counter) observational techniques. The measurements allowed us to follow both the PM variation at ground level and the vertical profile of fresh biomass burning aerosol as well as to analyze the optical and microphysical properties. The results evidenced the presence of a layer of fine mode aerosol with large mean values of optical depth (AOD > 0.25) and Ångstrom exponent (γ > 1.5) above the observational site. Moreover, the lidar ratio and aerosol linear depolarization obtained from the lidar observations were about 40 sr and 4%, respectively, consistent with the presence of biomass burning aerosol in the atmosphere.

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