@Article{GerkenWCFSMACSFJMSVCSTT:2016:DoTrOz,
author = "Gerken, Tobias and Wei, Dandan and Chase, Randy J. and Fuentes,
Jose D. and Schumacher, Courtney and Machado, Luiz Augusto Toledo
and Andreoli, Rita V. and Chamecki, Marcelo and Souza, Rodrigo A.
Ferreira de and Freire, Livia S. and Jardine, Angela B. and Manzi,
Antonio Ocimar and Santos, Rosa M. Nascimento dos and Von Randow,
Celso and Costa, Patr{\'{\i}}cia dos Santos and Stoy, Paul C.
and Tota, Julio and Trowbridge, Amy M.",
affiliation = "{The Pennsylvania State University} and {The Pennsylvania State
University} and {The College at Brockport State University of New
York} and {The Pennsylvania State University} and {Texas A\&M
University} and {Instituto Nacional de Pesquisas Espaciais (INPE)}
and {Universidade do Estado do Amazonas} and {The Pennsylvania
State University} and {Universidade do Estado do Amazonas} and
{The Pennsylvania State University} and {Instituto Nacional de
Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de
Pesquisas da Amaz{\^o}nia (INPA)} and {Universidade do Estado do
Amazonas} and {Instituto Nacional de Pesquisas Espaciais (INPE)}
and {Universidade do Estado do Amazonas} and {Montana State
University} and {Universidade Federal do Oeste do Par{\'a}} and
{Montana State University}",
title = "Downward transport of ozone rich air and implications for
atmospheric chemistry in the Amazon rainforest",
journal = "Atmospheric Environment",
year = "2016",
volume = "124",
number = "part A",
pages = "64--76",
month = "Jan.",
keywords = "Isoprene, Monoterpenes, Air chemistry, Convection, Mesoscale
convective storms.",
abstract = "From April 2014 to January 2015, ozone (O3) dynamics were
investigated as part of GoAmazon 2014/5 project in the central
Amazon rainforest of Brazil. Just above the forest canopy, maximum
hourly O3 mixing ratios averaged 20 ppbv (parts per billion on a
volume basis) during the JuneSeptember dry months and 15 ppbv
during the wet months. Ozone levels occasionally exceeded 75 ppbv
in response to influences from biomass burning and regional air
pollution. Individual convective storms transported O3-rich air
parcels from the mid-troposphere to the surface and abruptly
enhanced the regional atmospheric boundary layer by as much as 25
ppbv. In contrast to the individual storms, days with multiple
convective systems produced successive, cumulative ground-level O3
increases. The magnitude of O3 enhancements depended on the
vertical distribution of O3 within storm downdrafts and origin of
downdrafts in the troposphere. Ozone mixing ratios remained
enhanced for > 2 h following the passage of storms, which enhanced
chemical processing of rainforest-emitted isoprene and
monoterpenes. Reactions of isoprene and monoterpenes with O3 are
modeled to generate maximum hydroxyl radical formation rates of 6
× 106\ radicals\ cm\−3s\−1. Therefore,
one key conclusion of the present study is that downdrafts of
convective storms are estimated to transport enough O3 to the
surface to initiate a series of reactions that reduce the
lifetimes of rainforest-emitted hydrocarbons.",
doi = "10.1016/j.atmosenv.2015.11.014",
url = "http://dx.doi.org/10.1016/j.atmosenv.2015.11.014",
issn = "1352-2310",
language = "en",
targetfile = "gerken.pdf",
urlaccessdate = "03 jun. 2024"
}