@Article{NascimentoBMBRVBGRFCCSMA:2021:AeAnBi,
author = "Nascimento, Jana{\'{\i}}na P. and Bela, Megan M. and Meller,
Bruno B. and Banducci, Alessandro L. and Rizzo, Luciana V. and
Vara-Vela, Angel Ludivino and Barbosa, Henrique M. J. and Gomes,
Helber and Rafee, Sameh A. A. and Franco, Marco A. and Carbone,
Samara and Cirino, Glauber G. and Souza, Rodrigo A. F. and Mckeen,
Stuart A. and Artaxo, Paulo",
affiliation = "{Universidade do Estado do Amazonas (UEA)} and {University of
Colorado Boulder} and {Universidade de S{\~a}o Paulo (USP)} and
{Colorado State University} and {Universidade de S{\~a}o Paulo
(USP)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade de S{\~a}o Paulo (USP)} and {Universidade Federal
de Alagoas (UFAL)} and {Universidade de S{\~a}o Paulo (USP)} and
{Universidade de S{\~a}o Paulo (USP)} and {Universidade Federal
de Uberl{\^a}ndia (UFU)} and {Universidade Federal do Par{\'a}
(UFPA)} and {Universidade do Estado do Amazonas (UEA)} and
{University of Colorado Boulder} and {Universidade de S{\~a}o
Paulo (USP)}",
title = "Aerosols from anthropogenic and biogenic sources and their
interactions-modeling aerosol formation, optical properties, and
impacts over the central Amazon basin",
journal = "Atmospheric Chemistry and Physics",
year = "2021",
volume = "21",
number = "9",
pages = "6755--6779",
month = "May",
abstract = "The Green Ocean Amazon experiment-GoAmazon 2014-2015-explored the
interactions between natural biogenic forest emissions from
central Amazonia and urban air pollution from Manaus. Previous
GoAmazon 2014-2015 studies showed that nitrogen oxide (NOx
DNOCNO2) and sulfur oxide (SOx ) emissions from Manaus strongly
interact with biogenic volatile organic compounds (BVOCs),
affecting secondary organic aerosol (SOA) formation. In previous
studies, ground-based and aircraft measurements provided evidence
of SOA formation and strong changes in aerosol composition and
properties. Aerosol optical properties also evolve, and their
impacts on the Amazonian ecosystem can be significant. As
particles age, some processes, such as SOA production, black
carbon (BC) deposition, particle growth and the BC lensing effect
change the aerosol optical properties, affecting the solar
radiation flux at the surface. This study analyzes data and models
SOA formation using the Weather Research and Forecasting with
Chemistry (WRFChem) model to assess the spatial variability in
aerosol optical properties as the Manaus plumes interact with the
natural atmosphere. The following aerosol optical properties are
investigated: Single scattering albedo (SSA), asymmetry parameter
(gaer), absorption Angstrom exponent (AAE) and scattering Angstrom
exponent (SAE). These simulations were validated using
ground-based measurements at three experimental sites, namely the
Amazon Tall Tower Observatory-ATTO (T0a), downtown Manaus (T1),
Tiwa Hotel (T2) and Manacapuru (T3), as well as the U.S.
Department of Energy (DOE) Gulfstream 1 (G-1) aircraft flights.
WRFChem simulations were performed over 7 d during March 2014.
Results show a mean biogenic SOA (BSOA) mass enrichment of 512% at
the T1 site, 450% in regions downwind of Manaus, such as the T3
site, and 850% in areas north of the T3 site in simulations with
anthropogenic emissions. The SOA formation is rather fast, with
about 80% of the SOA mass produced in 3-4 h. Comparing the plume
from simulations with and without anthropogenic emissions, SSA
shows a downwind reduction of approximately 10 %, 11% and 6% at
the T1, T2 and T3 sites, respectively. Other regions, such as
those further downwind of the T3 site, are also affected. The gaer
values increased from 0.62 to 0.74 at the T1 site and from 0.67 to
0.72 at the T3 site when anthropogenic emissions are active.
During the Manaus plume-aging process, a plume tracking analysis
shows an increase in SSA from 0.91 close to Manaus to 0.98 160 km
downwind of Manaus as a result of SOA production and BC
deposition.",
doi = "10.5194/acp-21-6755-2021",
url = "http://dx.doi.org/10.5194/acp-21-6755-2021",
issn = "1680-7316 and 1680-7324",
language = "en",
targetfile = "nascimento_aerosols.pdf",
urlaccessdate = "09 maio 2024"
}