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Intermediate-scale horizontal isoprene concentrations in the near-canopy forest...
Batista, Carla E.; Ye, Jianhuai; Ribeiro, Igor Oliveira; Guimarães, Patrícia Costa; Medeiros, Adan Sady S.; Barbosa, Rafael G.; Oliveira, Rafael L.The emissions, deposition, and chemistry of volatile organic compounds (VOCs) are thought to be influenced by underlying landscape heterogeneity at intermediate horizontal scales of several hundred meters across different forest subtypes within a tropical forest. Quantitative observations and scientific understanding at these scales, however, remain lacking, in large part due to a historical absence of canopy a...
Vertical profiles of Ozone concentration collected by an Unmanned Aerial Vehicl...
Guimarães, Patrícia Costa; Ye, Jianhuai; Batista, Carla E.; Barbosa, Rafael G.; Ribeiro, Igor Oliveira; Medeiros, Adan Sady S.The nighttime boundary layer was studied in an urban area surrounded by tropical forest by use of a copter-type unmanned aerial vehicle (UAV) in central Amazonia during the wet season. Fifty-seven vertical profiles of ozone concentration, potential temperature, and specific humidity were collected from surface to 500 m above ground level (a.g.l.) at high vertical and temporal resolutions by use of embedded sens...
Power plant fuel switching and air quality in a tropical, forested environment
Medeiros, Adan Sady S.; Calderaro, Gisele; Guimarães, Patrícia Costa; Magalhaes, Mateus R.; Morais, Marcos Vinícius Bueno de; Rafee, Sameh Adib AbouHow a changing energy matrix for electricity production affects air quality is considered for an urban region in a tropical, forested environment. Manaus, the largest city in the central Amazon Basin of Brazil, is in the process of changing its energy matrix for electricity production from fuel oil and diesel to natural gas over an approximately 10-year period, with a minor contribution by hydropower. Three sce...
Urban pollution greatly enhances formation of natural aerosols over the Amazon ...
Shrivastava, Manish K.; Andreae, Meinrat O.; Artaxo, Paulo; Barbosa, H. M. J.; Berg, Larry K.; Brito, Joel F.; Ching, Joseph; Easter, Richard C.One of the least understood aspects in atmospheric chemistry is how urban emissions influence the formation of natural organic aerosols, which affect Earth’s energy budget. The Amazon rainforest, during its wet season, is one of the few remaining places on Earth where atmospheric chemistry transitions between preindustrial and urban-influenced conditions. Here, we integrate insights from several laboratory meas...
The influence that different urban development models has on PM2.5 elemental an...
Polezer, Gabriela; Oliveira, Andrea S.; Potgieter-Vermaak, Sanja; Godoi, Ana Flávia Locateli; Souza, Rodrigo Augusto Ferreira de; Yamamoto, Carlos ItsuoLimited studies have reported on in-vitro analysis of PM2.5 but as far as the authors are aware, bioaccessibility of PM2.5 in artificial lysosomal fluid (ALF) has not been linked to urban development models before. The Brazilian cities Manaus (Amazon) and Curitiba (South region) have different geographical locations, climates, and urban development strategies. Manaus drives its industrialization using the free ...