@Article{HodgsonMOBADFLLJHLAC:2018:NeEmPr,
author = "Hodgson, Amy K. and Morgan, William T. and O’Shea, Sebastian and
Bauguitte, St{\'e}phane and Allan, James D. and Darbyshire,
Eoghan and Flynn, Michael J. and Liu, Dantong and Lee, James and
Johnson, Ben and Haywood, Jim M. and Longo, Karla Maria and
Artaxo, Paulo E. and Coe, Hugh",
affiliation = "{University of Manchester} and {University of Manchester} and
{University of Manchester} and {Cranfield University} and
{University of Manchester} and {University of Manchester} and
{University of Manchester} and {University of Manchester} and
{University of York} and {Met Office} and {University of Exeter}
and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade de S{\~a}o Paulo (USP)} and {University of
Manchester}",
title = "Near-field emission profiling of tropical forest and Cerrado fires
in Brazil during SAMBBA 2012",
journal = "Atmospheric Chemistry and Physics",
year = "2018",
volume = "18",
number = "8",
pages = "5619--5638",
month = "Apr.",
abstract = "We profile trace gas and particulate emissions from near-field
airborne measurements of discrete smoke plumes in Brazil during
the 2012 biomass burning season. The South American Biomass
Burning Analysis (SAMBBA) Project conducted during September and
October 2012 sampled across two distinct fire regimes prevalent in
the Amazon Basin. Combined measurements from a Compact
Time-of-Flight Aerosol Mass Spectrometer (C-ToF-AMS) and a Single
Particle Soot Photometer (SP2) are reported for the first time in
a tropical biomass burning environment. Emissions from a mostly
smouldering tropical forest wildfire in Rond{\^o}nia state and
numerous smaller flaming Cerrado fires in Tocantins state are
presented. While the Cerrado fires appear to be representative of
typical fire conditions in the existing literature, the tropical
forest wildfire likely represents a more extreme example of
biomass burning with a bias towards mostly smouldering emissions.
We determined fire-integrated modified combustion efficiencies,
emission ratios and emission factors for trace gas and particulate
components for these two fire types, alongside aerosol
microphysical properties. Seven times more black carbon was
emitted from the Cerrado fires per unit of fuel combustion (EFBC
of 0.13±0.04\ĝg\ĝkg-1) compared to the tropical forest
fire (EFBC of 0.019±0.006g\ĝkg-1), and more than 6 times the
amount of organic aerosol was emitted from the tropical forest
fire per unit of fuel combustion (EFOM of 8.00±2.53g\ĝkg-1,
EFOC of 5.00±1.58g\ĝkg-1) compared to the Cerrado fires
(EFOM of 1.31±0.42g\ĝkg-1, EFOC of 0.82±0.26g\ĝkg-1).
<br><br> Particulate-phase species emitted from the fires sampled
are generally lower than those reported in previous studies and in
emission inventories, which is likely a combination of differences
in fire combustion efficiency and fuel mixture, along with
different measurement techniques. Previous modelling studies
focussed on the biomass burning season in tropical South America
have required significant scaling up of emissions to reproduce in
situ and satellite aerosol concentrations over the region. Our
results do not indicate that emission factors used in inventories
are biased low, which could be one potential cause of the reported
underestimates in modelling studies. This study supplements and
updates trace gas and particulate emission factors for
fire-type-specific biomass burning in Brazil for use in weather
and climate models. The study illustrates that initial fire
conditions can result in substantial differences in terms of their
emitted chemical components, which can potentially perturb the
Earth system.",
doi = "10.5194/acp-18-5619-2018",
url = "http://dx.doi.org/10.5194/acp-18-5619-2018",
issn = "1680-7316 and 1680-7324",
language = "en",
targetfile = "hodgson_near.pdf",
urlaccessdate = "19 abr. 2024"
}