A5011952171- Atmospheric aerosols and clouds
- Lightning and Electromagnetic Phenomena
- Fire effects on ecosystems
- Atmospheric chemistry and aerosols
- Meteorological Phenomena and Simulations
- Environmental and biological studies
- Geography and Environmental Studies
- Aeolian processes and effects
- Precipitation Measurement and Analysis
- Plant Water Relations and Carbon Dynamics
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Earthquake Detection and Analysis
- Climate variability and models
- Ionosphere and magnetosphere dynamics
- Plant responses to elevated CO2
- Solar Radiation and Photovoltaics
- Atmospheric and Environmental Gas Dynamics
- Graphite, nuclear technology, radiation studies
- Power Line Communications and Noise
- Urban Arborization and Environmental Studies
- Tropical and Extratropical Cyclones Research
- Indoor Air Quality and Microbial Exposure
- Geophysics and Gravity Measurements
- Electrical Fault Detection and Protection
Universidade de São Paulo
2011-2025
University of Maryland, College Park
2010-2023
National Institute for Space Research
2010-2020
Museu de Astronomia e Ciências Afins
2017-2020
Instituto de Geofísica y Astronomía
2017
Atmos (Czechia)
2017
Hospital Universitário da Universidade de São Paulo
2017
Marshall Space Flight Center
2016
University of Alabama in Huntsville
2016
National Aeronautics and Space Administration
2016
Abstract Previous total lightning climatology studies using Tropical Rainfall Measuring Mission (TRMM) Lightning Imaging Sensor (LIS) observations were reported at coarse resolution (0.5°) and employed significant spatial temporal smoothing to account for sampling limitations of TRMM’s tropical subtropical low-Earth-orbit coverage. The analysis here uses a 16-yr reprocessed dataset create very high-resolution (0.1°) with no further averaging. This reveals that Earth’s principal hotspot...
Abstract The Observations and Modeling of the Green Ocean Amazon 2014–2015 (GoAmazon2014/5) experiment took place around urban region Manaus in central Amazonia across 2 years. pollution plume was used to study susceptibility gases, aerosols, clouds, rainfall human activities a tropical environment. Many aspects air quality, weather, terrestrial ecosystems, climate work differently tropics than more thoroughly studied temperate regions Earth. GoAmazon2014/5, cooperative project Brazil,...
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...
Abstract. Airborne observations over the Amazon Basin showed high aerosol particle concentrations in upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature pressure) often exceeding those planetary boundary layer (PBL) by 1 or 2 orders of magnitude. The measurements were made during German–Brazilian cooperative aircraft campaign ACRIDICON–CHUVA, where ACRIDICON stands for Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics...
CHUVA, meaning “rain” in Portuguese, is the acronym for Cloud Processes of Main Precipitation Systems Brazil: A Contribution to Cloud-Resolving Modeling and Global Measurement (GPM). The CHUVA project has conducted five field campaigns; sixth last campaign will be held Manaus 2014. primary scientific objective contribute understanding cloud processes, which represent one least understood components weather climate system. campaigns were designed investigate specific tropical regimes. first...
Abstract. We have investigated how aerosols affect the height above cloud base of rain and ice hydrometeor initiation subsequent vertical evolution droplet size number concentrations in growing convective cumulus. For this purpose we used situ data distributions measured with instruments mounted on HALO aircraft during ACRIDICON–CHUVA campaign over Amazon September 2014. The results show that by collision coalescence processes (Dr, units meters base) is linearly correlated concentration...
Abstract New particle formation (NPF) in the tropical upper troposphere is a globally important source of atmospheric aerosols 1–4 . It known to occur over Amazon basin, but nucleation mechanism and chemical precursors have yet be identified 2 Here we present comprehensive situ aircraft measurements showing that extremely low-volatile oxidation products isoprene, particularly certain organonitrates, drive NPF Amazonian troposphere. The organonitrates originate from OH-initiated isoprene...
We present case studies identifying lightning‐generated upper tropospheric NO x (LNO ) observed during NASA's Tropical Composition, Cloud and Climate Coupling Experiment (TC 4 in July August 2007. In the campaign, DC‐8 aircraft missions, flown from Costa Rica, recorded situ 2 profiles near active storms relatively quiet areas. combine these TC data with satellite Ozone Monitoring Instrument (OMI) to estimate ), above background levels, OMI fields. employ improved off‐line processing...
Abstract. The effects of aerosol particles and updraft speed on warm-phase cloud microphysical properties are studied in the Amazon region as part ACRIDICON-CHUVA experiment. Here we expand sensitivity analysis usually found literature by concomitantly considering evolution, putting quantifications into perspective relation to in-cloud processing, droplet size distribution (DSD) shape. Our situ aircraft measurements over Basin cover a wide range particle concentration thermodynamic...
[1] This study investigated the physical processes involved in development of thunderstorms over southwestern Amazon by hypothesizing causalities for observed cloud-to-ground lightning variability and local environmental characteristics. Southwestern experiences every year a large variety factors, such as gradual increase atmospheric moisture, extremely high pollution due to biomass burning, intense deforestation, which directly affects cloud differential surface energy partition. In end dry...
Abstract. This study provides an overview of precipitation processes and their sensitivities to environmental conditions in the Central Amazon Basin near Manaus during GoAmazon2014/5 ACRIDICON-CHUVA experiments. takes advantage numerous measurement platforms instrument systems operating both campaigns sample cloud structure 2014 2015; rainfall variability among seasons, aerosol loading, land surface type, topography has been carefully characterized using these data. Differences between wet...
Abstract Identification and validation of atmospheric extremes are essential to monitoring climate change, addressing engineering safety concerns, promoting technological advancement. An international World Meteorological Organization evaluation committee has critically adjudicated recommended acceptance two lightning megaflash events (horizontal mesoscale discharges >100 km in length) as new global using analysis Geostationary Lightning Mapper data. The world's greatest extent for an...
A case study of convective development in the Southwest Amazon region during Wet Season Atmospheric Mesoscale Campaign (WETAMC) and Tropical Rainfall Measuring Mission (TRMM)/Large‐Scale Biosphere‐Atmosphere (LBA) Experiment Amazonia is presented. The 7 February 1999 shown to occur a period very weak large‐scale forcing presence topography deforestation. available data include dual Doppler radar analysis, radiosonde launches, surface boundary layer observations. observational analysis...
Abstract. The objective of this study is to validate parameterizations that were recently developed for satellite retrievals cloud condensation nuclei supersaturation spectra, NCCN(S), at base alongside more traditional connecting NCCN(S) with updrafts and drop concentrations. This was based on the HALO aircraft measurements during ACRIDICON–CHUVA campaign over Amazon region, which took place in September 2014. properties convective clouds measured a combination probe (CCP), aerosol...
Abstract This paper analyzes the cloud microphysics in different layers of storms as a function three‐dimensional total lightning density. A mobile X‐band polarimetric radar and very high frequency (VHF) sources from Lightning Mapping Array (LMA) observations during 2011/2012 Brazil spring‐summer were used to determine microphysical signatures vertical profiles study quantified behavior 5.3 million horizontal reflectivity ( Z H ), differential DR specific phase K DP correlation coefficient ρ...
Abstract The relationship between the electric field of storms and surface ozone (O 3 ) levels in Amazon Tall Tower Observatory (ATTO) region was investigated. Our findings reveal that concentrations increase with rise absolute (| E z |) clouds. This phenomenon is linked to amplification downdraft magnitudes, which are similarly associated | |. Detailed analysis also indicated stronger downdrafts correlate higher levels. Consequently, |‐downdrafts‐O interaction forms a coupled system,...
The Amazon rainforest plays an important role in global climate systems, particularly regional precipitation patterns, atmospheric circulation, and Earth's energy balance. Convective systems this region are intricately linked to these broader climatic processes. Through a combination of ground-based, satellite, aircraft observations, we find that Amazonian convective clouds sensitive aerosol concentrations, being highly aerosol-limited. This study explores the relationship between cloud...
We first present a summary of results from ATTO-Campina, new permanent observational site deployed in central Amazon, about 4 km the ATTO towers. Those are then complemented by preliminary modeling studies shallow cumulus clouds organization. Operational since 2020, ATTO-Campina focuses on characterizing atmospheric, cloud and rainfall properties through remote sensing. The overarching goal is to provide continuous, complementary measurements towers, addressing rainforest’s complex...
Lightning-produced nitrogen oxides (LNOx) represent a key source of reactive in the Amazon, yet their role regional atmospheric chemistry and transport remains poorly constrained. Beyond ozone production, LNOx is driver new aerosol particle formation upper troposphere, with earlier studies linking this process to outflow deep convective clouds downward flux particles during precipitation events. However, recent findings highlight that injections driven by from processes also play crucial...
Tropospheric ozone (O 3 ) is a pollutant and major greenhouse gas its radiative forcing still uncertain. Inadequate understanding of processes related to O production, in particular those natural ones such as lightning, contributes this uncertainty. Here we demonstrate new effect aerosol particles on production by affecting lightning activity lightning‐generated NO x (LNO ). We find that flash rate increases at remarkable 30 times or more per unit optical depth. provide observational...
Abstract. The remote atmosphere over the Amazon can be similar to oceanic regions in terms of aerosol conditions and cloud type formations. This is especially true during wet season. main aerosol-related disturbances have both natural sources, such as dust transport from Africa, anthropogenic biomass burning or urban pollution. present work considers impacts latter on microphysical properties warm-phase clouds by analysing observations interactions between Manaus pollution plume its...
Abstract. Airborne observations over the Amazon Basin showed high aerosol particle concentrations in upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature pressure) often exceeding those planetary boundary layer (PBL) by one or two orders of magnitude. The measurements were made during German-Brazilian cooperative aircraft campaign ACRIDICON-CHUVA on German High Altitude Long Range Research Aircraft (HALO). took place September/October...