A5015214743- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Solar Radiation and Photovoltaics
- Air Quality and Health Impacts
- Fire effects on ecosystems
- Plant responses to elevated CO2
- Environmental and biological studies
- Remote Sensing in Agriculture
- Urban Heat Island Mitigation
- Plant Water Relations and Carbon Dynamics
- Calibration and Measurement Techniques
- Vehicle emissions and performance
- Advanced Image Fusion Techniques
- Spectroscopy and Laser Applications
- Aeolian processes and effects
- Impact of Light on Environment and Health
- Geography and Environmental Studies
- Photovoltaic System Optimization Techniques
- Heavy metals in environment
- Meteorological Phenomena and Simulations
- Climate variability and models
- Solar Thermal and Photovoltaic Systems
- solar cell performance optimization
Universidade de São Paulo
2015-2024
Universidade Cidade de São Paulo
2023
Instituto de Geofísica y Astronomía
2015
Universidade Brasil
2013
National Institute for Space Research
2009
Museu de Astronomia e Ciências Afins
2005
University of Maryland, Baltimore County
2002
University of Maryland, Baltimore
2002
Abstract Between 1 September and 4 October 2014, a combined airborne ground-based measurement campaign was conducted to study tropical deep convective clouds over the Brazilian Amazon rain forest. The new German research aircraft, High Altitude Long Range Research Aircraft (HALO), modified Gulfstream G550, extensive instrumentation were deployed in near Manaus (State of Amazonas). part German–Brazilian Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics Convective Cloud...
As part of the Large‐Scale Biosphere‐Atmosphere Experiment in Amazonia (LBA), a large study aerosol and trace gas properties was conducted during dry wet seasons for pasture primary forest sites. Aerosol mass elemental composition were measured on filters both fine (d p < 2.0 μm) coarse (2.0 d 10 modes using polycarbonate mounted stacked filter units (SFU). Measurements with real‐time monitors made, parallel to collection samples obtain high time resolution (1–30 min). Black carbon...
The optical properties of aerosols such as smoke from biomass burning vary due to aging processes and these particles reach larger sizes at high concentrations. We compare the spectra aerosol depth (τ a ), column‐integrated volume size distributions, refractive indices, single scattering albedo retrieved AERONET observations for four selected events very ∼ 2 500 nm). Two case studies are tropical regions (Brazil Zambia) two cases boreal forest peat fire transported long distances sites in US...
Aerosol particles were collected aboard two Brazilian Bandeirante EMB 110 planes, and the University of Washington Convair C‐131A aircraft during Smoke, Clouds, Radiation‐Brazil (SCAR‐B) field project in Amazon Basin August September 1995. Aerosols on Nuclepore Teflon filters. size distribution was measured with a MOUDI cascade impactor. Sampling performed mostly over areas heavily influenced by biomass burning smoke. Particle‐induced X ray emission (PIXE) used to measure concentrations up...
The Amazon Basin tropical rain forest is a key region to study processes that are changing the composition of global atmosphere, including large amount fine mode aerosol particles emitted during biomass burning might influence atmosphere. Three background monitoring stations, Alta Floresta, Cuiabá, and Serra do Navio, operating continuously measuring composition. Fine ( dp < 2.0 μm) coarse (2.0 10 were collected using stacked filter units. Particle‐induced X‐ray emission was used measure...
Abstract. In this study, an extension on the previously reported status of COllaborative Carbon Column Observing Network's (COCCON) calibration procedures incorporating refined methods is presented. COCCON a global network portable Bruker EM27/SUN FTIR spectrometers for deriving column-averaged atmospheric abundances greenhouse gases. The original laboratory open-path lamp measurements instrumental line shape (ILS) spectrometer from water vapour lines have been and extended to secondary...
A method of aerosol single‐scattering albedo retrieval from diffuse radiance measured in the solar almucantar and direct measurements is proposed. The scattering optical thickness derived by applying a radiative transfer model driven microstructure parameters Mie theory. To improve accuracy thickness, inversion results are acceptable only if across total accurately fitted theoretical model. assumed as an external mixture purely particles soot particles, with approximated pure absorber....
Abstract. Speciated monoterpene measurements in rainforest air are scarce, but they essential for understanding the contribution of these compounds to overall reactivity volatile organic compound (VOC) emissions towards main atmospheric oxidants, such as hydroxyl radicals (OH), ozone (O3) and nitrate (NO3). In this study, we present chemical speciation gas-phase monoterpenes measured tropical at Amazon Tall Tower Observatory (ATTO, Amazonas, Brazil). Samples VOCs were collected by two...
Continuous sampling of atmospheric aerosols was carried out at two different sites in the Amazon Basin: Cuiabá (16°S, 56°W), since July 1990, and Alta Floresta (09°S, August 1992. Aerosols were collected on polycarbonate filters mounted stacked filter units (SFU). Particle‐induced X ray emission (PIXE) used to measure concentrations up 26 elements (Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Rb, Sr, Zr, Au, Pb). Black carbon (BC) gravimetric mass analyses...
Abstract. Intra-seasonal variability of smoke aerosol optical depth (AOD) and downwelling solar irradiance at the surface during 2002 biomass burning season in South America was modeled using Coupled Chemistry-Aerosol-Tracers Transport model with Brazilian developments on Regional Atmospheric Modeling System (CCATT-BRAMS). Measurements total fine mode fraction (FMF) AOD from AErosol RObotic NETwork (AERONET) Solar Radiation Network (SolRad-NET) were used to evaluate results. In general,...
Abstract. Every year, a dense smoke haze covers large portion of South America originating from fires in the Amazon Basin and central parts Brazil during dry biomass burning season between August October. Over America, average aerosol optical depth at 550 nm exceeds 1.0 fire season, while background value rainy is below 0.2. Biomass particles increase scattering absorption incident solar radiation. The regional-scale layer reduces amount energy reaching surface, cools near-surface air,...
Several aerosol and solar flux monitoring sites were established in Brazil for the Large Scale Biosphere‐Atmosphere Experiment Amazônia project. CIMEL sunphotometers collocated pyranometers employed at two southern Amazonian order to quantify instantaneous reductions of total irradiance due high optical thickness (AOT) smoke events (relative values modeled background conditions). Results from Brazilian are presented 1999 comparison, a similar analysis is discussed data three south‐central...
Abstract. Biomass burning activities emit high concentrations of aerosol particles to the atmosphere. Such can interact with solar radiation, decreasing amount light reaching surface and increasing fraction diffuse radiation through scattering processes, thus has implications for photosynthesis within plant canopies. This work reports results from photosynthetically active (PAR) optical depth (AOD) measurements conducted simultaneously at Reserva Biológica do Jaru (Rondonia State, Brazil)...
Abstract. Biomass burning is a worldwide practice applied to deforestation which can have disastrous consequences local and regional environments. This paper describes case study of an extreme event biomass smoke transport toward the São Paulo metropolitan area (MASP), on 19 August 2019, when city experienced uncommon completely dark sky around 3:00 PM. A synergy between air mass back trajectories, satellite retrieved aerosol fields surface radiometric measurements was used find origin plume...
Abstract. The Metropolitan Area of São Paulo (MASP) in Brazil has reduced its vehicular emissions the last decades. However, it is still affected by air pollution events, mainly winter, characterized as a dry season. chemical composition fine particulate matter (PM2.5) was studied MASP during 100 d period 2019. PM2.5 samples underwent an extensive characterization (including inorganic and organic species), ecotoxicity assessed using bioluminescence-based assay, submicrometer particle number...
A method is used to retrieve the real part of refractive index ambient aerosol particles in entire vertical column using ground‐based measurements angular dependence spectral sky radiance. The applied smoke Sun/sky data measured by AERONET (Aerosol Robotic Network) radiometers Cuiabá, Brazil, during SCAR‐B (Smoke, Clouds, and Radiation‐Brazil) experiment 1995. retrieved from comparison between taken solar almucantar calculations Mie theory. First size distribution derived radiance at...
Aerosol absorption of sunlight, in particular by black carbon ‐ soot and dark organic material produced from incomplete combustion fossil fuel vegetation fires, is emerging as a key component climate forcing. However, global characterization emissions, distribution sunlight cannot be determined within factor 5. Here we propose that the oceanic sunglint can used bright background against which aerosol measured space. The method map ocean glint every 4–10 days determine optical thickness with...
We analysed ozone and carbon monoxide profiles measured by commercial aircrafts from the MOZAIC/IAGOS fleet, during ascending descending flights over Caracas, in Venezuela, August 1994 to December 2009, Rio de Janeiro, 2004 July 2012 June 2013, São Paulo, Brazil, 2005. For ozone, results showed a clean atmosphere Caracas presenting highest seasonal mean March, April May. Backward trajectory analyses with FLEXPART, of case studies for which concentrations were high, that contributions local,...
Abstract. Accurate modeling of aerosol optical properties is critical to simulate radiative effects. However, uncertainties regarding the simulation intensive are still significant. Therefore, use observations constrain in models has been indicated as an option. Also, explicit computations too costly for operational models, which make observational-based prescriptions a convenient solution. We developed prescription driven by machine-learning techniques that can be applied models. The...