@Article{BelaFFMBWGWAA:2015:OzPrTr,
author = "Bela, M. M. and Freitas, Karla Maria Longo de and Freitas, Saulo
Ribeiro de and Moreira, Demerval Soares and Beck, V. and Wofsy, S.
C. and Gerbig, C. and Wiedemann, K. and Andreae, M. O. and Artaxo,
P.",
affiliation = "{University of Colorado} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Max Planck Institute for Biogeochemistry} and {Harvard
University} and {Max Planck Institute for Biogeochemistry} and
{Harvard University} and {Max Planck Institute for Chemistry} and
{Universidade de S{\~a}o Paulo (USP)}",
title = "Ozone production and transport over the Amazon Basin during the
dry-to-wet and wet-to-dry transition seasons",
journal = "Atmospheric Chemistry and Physics",
year = "2015",
volume = "15",
pages = "757–782",
abstract = "The Regional Carbon Balance in Amazonia (BARCA) campaign provided
the first Amazon Basin-wide aircraft measurements of ozone (O3)
during both the dry-towet (November and December 2008) and
wet-to-dry (May 2009) transition seasons. Extremely low background
values (< 20 ppb) were observed to the west and north of Manaus in
both seasons and in all regions during the wet-to-dry transition.
On the other hand, elevated O3 levels (4060 ppb) were seen during
the dry-to-wet transition to the east and south of Manaus, where
biomass burning emissions of O3 precursors were present. Chemistry
simulations with the CCATTBRAMS and WRF-Chem models are within the
error bars of the observed O3 profiles in the boundary layer (03
km a.s.l.) in polluted conditions. However, the models
overestimate O3 in the boundary layer in clean conditions, despite
lacking the predominant NO source from soil. In addition, O3
simulated by the models was either within the error bars or lower
than BARCA observations in mid-levels (35 km a.s.l.), and lower
than total tropospheric O3 retrieved from the OMI/MLS instruments,
which is primarily comprised of middle troposphere O3 and thus
reflects long-range transport processes. Therefore, the models do
a relatively poor job of representing the free
troposphere-boundary layer gradient in O3 compared with aircraft
and satellite observations, which could be due to missing
long-range and convective transport of O3 at mid-levels.
Additional simulations with WRF-Chem showed that the model O3
production is very sensitive to both the O3 deposition velocities
and the NOx emissions, which were both about one-half of observed
values. These results indicate the necessity of more realistic
model representations of emissions, deposition, and convective
processes for accurate monitoring and prediction of increases in
O3 production in the Amazon Basin as the regional population
grows.",
doi = "10.5194/acp-15-757-2015",
url = "http://dx.doi.org/10.5194/acp-15-757-2015",
issn = "1680-7316 and 1680-7324",
label = "self-archiving-INPE-MCTI-GOV-BR",
language = "en",
targetfile = "Bela_Ozone production.pdf",
urlaccessdate = "23 abr. 2024"
}