9 documents found, page 1 of 1
Monthly Convective Boundary Layer Height Study over Brazil Using Radiosonde, ER...
de Arruda Moreira, Gregori; Pérez Herrera, María Jesús; Garnés Morales, Ginés; Costa, Maria João; Cacheffo, Alexandre; Carbone, SamaraAlthough the atmospheric boundary layer height (ABLH) is a highly relevant parameter for various meteorological studies, the analysis of its behavior remains undersampled in South America, especially in Brazil. In this context, this work presents a monthly characterization of the ABLH during the convective period (Convective Boundary Layer Height-CBLH) using radiosonde data and a comparison between the monthly ...
Evidence of the consequences of the prolonged fire season on air quality and pu...
de Arruda Moreira, Gregori; Carbone, Samara; Guerrero-Rascado, Juan Luis; Andrade, Izabel; Cacheffo, Alexandre; Vélez-Pereira, AndrésOver the last decade, the number of forest fires in Brazil has been increasing continuously. In 2024, the number of forest fires in São Paulo state reached unprecedented levels. This phenomenon, combined with unfavorable conditions for pollutant concentrations, given temperature and precipitation anomalies, resulted in high concentrations of pollutants for several weeks, mainly affecting the number of hospitali...
The Amazon Tall Tower Observatory (ATTO): Overview of pilot measurements on eco...
Andreae, Meinrat O.; Acevedo, Otávio C.; Araüjo, Alessandro Carioca de; Artaxo, Paulo; Barbosa, Cybelli G.G.; Barbosa, H. M. J.; Brito, Joel F.The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, and biodiversity. It has already been changed significantly by human activities, and more pervasive change is expected to occur in the coming decades. It is therefore essential to establish long-term measurement sites that provide a baseline record of present-day climatic, biogeochemical, and atmospheric cond...
CCN activity and organic hygroscopicity of aerosols downwind of an urban region...
Thalman, Ryan M.; Sá, Suzane S. de; Palm, Brett B.; Barbosa, H. M. J.; Pöhlker, Mira L.; Alexander, Michael Lizabeth; Brito, Joel F.; Carbone, SamaraDuring the Observations and Modeling of the Green Ocean Amazon (GoAmazon2014/5) campaign, size-resolved cloud condensation nuclei (CCN) spectra were characterized at a research site (T3) 60 km downwind of the city of Manaus, Brazil, in central Amazonia for 1 year (12 March 2014 to 3 March 2015). Particle hygroscopicity (κCCN) and mixing state were derived from the size-resolved CCN spectra, and the hygroscopici...
Observations of Manaus urban plume evolution and interaction with biogenic emis...
Cirino, Glauber G.; Brito, Joel F.; Barbosa, H. M. J.; Rizzo, Luciana Varanda; Tunved, Peter; Sá, Suzane S. de; Ji?enez, José Luis; Palm, Brett B.As part of the Observations and Modeling of the Green Ocean Amazon (GoAmazon 2014/5) Experiment, detailed aerosol and trace gas measurements were conducted near Manaus, a metropolis located in the central Amazon Basin. Measurements of aerosol particles and trace gases were done downwind Manaus at the sites T2 (Tiwa Hotel) and T3 (Manacapuru), at a distance of 8 and 70 km from Manaus, respectively. Based on in-p...
Influence of urban pollution on the production of organic particulate matter fr...
Sá, Suzane S. de; Palm, Brett B.; Campuzano-Jost, Pedro; Day, Douglas A.; Newburn, Matt K.; Hu, Weiwei; Isaacman-VanWertz, Gabriel A.; Yee, Lindsay D.The atmospheric chemistry of isoprene contributes to the production of a substantial mass fraction of the particulate matter (PM) over tropical forests. Isoprene epoxydiols (IEPOX) produced in the gas phase by the oxidation of isoprene under HO2-dominant conditions are subsequently taken up by particles, thereby leading to production of secondary organic PM. The present study investigates possible perturbations...
Long-term study on coarse mode aerosols in the Amazon rain forest with the freq...
Morán-Zuloaga, Daniel; Ditas, Florian; Walter, David; Saturno, Jorge; Brito, Joel F.; Carbone, Samara; Chi, Xuguang; Hrab? de Angelis, Isabella<p>In the Amazonian atmosphere, the aerosol coarse mode comprises a complex, diverse, and variable mixture of bioaerosols emitted from the rain forest ecosystem, long-range transported Saharan dust (we use Sahara as shorthand for the dust source regions in Africa north of the Equator), marine aerosols from the Atlantic Ocean, and coarse smoke particles from deforestation fires. For the rain forest, the coarse m...
Urban influence on the concentration and composition of submicron particulate m...
Sá, Suzane S. de; Palm, Brett B.; Campuzano-Jost, Pedro; Day, Douglas A.; Hu, Weiwei; Isaacman-VanWertz, Gabriel A.; Yee, Lindsay D.; Brito, Joel F.An understanding of how anthropogenic emissions affect the concentrations and composition of airborne particulate matter (PM) is fundamental to quantifying the influence of human activities on climate and air quality. The central Amazon Basin, especially around the city of Manaus, Brazil, has experienced rapid changes in the past decades due to ongoing urbanization. Herein, changes in the concentration and comp...
Long-term observations of cloud condensation nuclei in the Amazon rain forest -...
Pöhlker, Mira L.; Pöhlker, Christopher; Ditas, Florian; Klimach, Thomas; Angelis, Isabella Hrabe de; Araüjo, Alessandro Carioca de; Brito, Joel F.Size-resolved long-term measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations and hygroscopicity were conducted at the remote Amazon Tall Tower Observatory (ATTO) in the central Amazon Basin over a 1-year period and full seasonal cycle (March 2014-February 2015). The measurements provide a climatology of CCN properties characteristic of a remote central Amazonian rain forest sit...