Pablo E. S. Oliveira
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View article: Evidence of the Influence of Land Use and Land Cover on Extreme Rainfall in Natal, Northeast of Brazil
Evidence of the Influence of Land Use and Land Cover on Extreme Rainfall in Natal, Northeast of Brazil Open
This study investigates the influence of land use and land cover (LULC) on the distribution of extreme rainfall in the tropical coastal city of Natal, Brazil. Hourly precipitation data from eight automatic rain gauges (2014–2023) were qual…
View article: Contribution of Different Forest Strata on Energy and Carbon Fluxes over an Araucaria Forest in Southern Brazil
Contribution of Different Forest Strata on Energy and Carbon Fluxes over an Araucaria Forest in Southern Brazil Open
Forest–atmosphere interactions through mass and energy fluxes significantly influence climate processes. However, due to anthropogenic actions, native Araucaria forests in southern Brazil, part of the Atlantic Forest biome, have been drast…
View article: Simulating Energy Balance Dynamics to Support Sustainability in a Seasonally Dry Tropical Forest in Semi-Arid Northeast Brazil
Simulating Energy Balance Dynamics to Support Sustainability in a Seasonally Dry Tropical Forest in Semi-Arid Northeast Brazil Open
In semi-arid regions, seasonally dry tropical forests are essential for regulating the surface energy balance, which can be analyzed by examining air heating processes and water availability control. The objective of this study was to eval…
View article: Meteorological and biophysical controls of evapotranspiration in tropical grazed pasture under rainfed conditions
Meteorological and biophysical controls of evapotranspiration in tropical grazed pasture under rainfed conditions Open
Evapotranspiration (ET) is the main driver of the energy balance partitioning and influences hydrological and carbon cycles at global, regional and local scales. Furthermore, it is the main requirement for developing strategies to improve …
View article: Zinc blende ZnS (001) surface structure investigated by XPS,LEED and DFT
Zinc blende ZnS (001) surface structure investigated by XPS,LEED and DFT Open
The formation and stability of a sulfur-rich surface of the zinc blende ZnS (001) single crystal have been examined by x-ray photoemission spectroscopy (XPS), low-energy electron diffraction (LEED), and density-functional theory (DFT) calc…
View article: Interannual Variability of Energy and CO2 Exchanges in a Remnant Area of the Caatinga Biome under Extreme Rainfall Conditions
Interannual Variability of Energy and CO2 Exchanges in a Remnant Area of the Caatinga Biome under Extreme Rainfall Conditions Open
Research focusing on energy, water vapor, and CO2 exchanges over the Caatinga Biome is recent. Consequently, there exist research gaps on this topic that limit our ability to understand and project interannual and long-term variations in t…
View article: Turbulent Fluxes Within and Above the Amazon Roughness Sublayer
Turbulent Fluxes Within and Above the Amazon Roughness Sublayer Open
For tropical forests, such as the Amazon Forest, the turbulence intensity at the forest-atmosphere interface is high since in this region there is strong convective activity during the day and the aerodynamic roughness of the forest canopy…
View article: Seasonal Ecosystem Productivity in a Seasonally Dry Tropical Forest (Caatinga) Using Flux Tower Measurements and Remote Sensing Data
Seasonal Ecosystem Productivity in a Seasonally Dry Tropical Forest (Caatinga) Using Flux Tower Measurements and Remote Sensing Data Open
The Caatinga dry forest encompasses 11% of the total continental territory of Brazil. Nevertheless, most research on the relationship between phenology and ecosystem productivity of Brazilian tropical forests is aimed at the Amazon basin. …
View article: The ATTO Micrometeorological Intercomparison Experiment (ATMIX)
The ATTO Micrometeorological Intercomparison Experiment (ATMIX) Open
<div> <div> <div> <p>A central constituent of the ATTO project&#160; is the deployment of an array of sonic anemometers to measure vertical profiles of means and second-order moments of the wind velocity vector.…
View article: Impact of Atmospheric Stability on Vertical Propagation of Submeso and Coherent Structure in a Dense Amazon Forest
Impact of Atmospheric Stability on Vertical Propagation of Submeso and Coherent Structure in a Dense Amazon Forest Open
<p>Observations of the vertical structure of the turbulent flow in different stability regimes above and within the Amazon Forest at the Amazon Tall Tower Observatory (ATTO) site are presented. The shear length scale at the canopy to…
View article: The Fallow Period Plays an Important Role in Annual CH4 Emission in a Rice Paddy in Southern Brazil
The Fallow Period Plays an Important Role in Annual CH4 Emission in a Rice Paddy in Southern Brazil Open
Paddy fields are significant anthropogenic sources of methane (CH4) emissions. In southern Brazil, rice is grown in lowland flooded areas once a year, followed by a long fallow period. This study aimed to measure CH4 fluxes in a rice paddy…
View article: Influence of Atmospheric Stability on the flow dynamics within and above a dense Amazonian forest
Influence of Atmospheric Stability on the flow dynamics within and above a dense Amazonian forest Open
<p>This study provides a detailed analysis of the influence of atmospheric stratification on the flow dynamics above and within a dense forest for a 19-days campaign at the Amazon Tall Tower Observatory (ATTO) site. Observations take…
View article: Variabilidade temporal dos fluxos noturnos determinados a partir de duas diferentes metodologias no nível de 325 m acima da floresta Amazônica
Variabilidade temporal dos fluxos noturnos determinados a partir de duas diferentes metodologias no nível de 325 m acima da floresta Amazônica Open
The present study aimed to analyze and compare the temporal variability of the nocturnal fluxes of CO2, sensitive and latent heat, calculated from two different methodologies: one with a 5-minute temporal window (using the eddy covariance …
View article: Análise do escoamento horizontal de movimento não turbulento na camada limite noturna sob influência de obstruções
Análise do escoamento horizontal de movimento não turbulento na camada limite noturna sob influência de obstruções Open
When turbulence is well developed, the diffusivity tends to quickly destroy other flow variability modes, so that the turbulent processes become dominant. However, in cases of weak or intermittent turbulence the turbulence scales are restr…
View article: Análise noturna dos mecanismos que controlam os gradientes de CO2 e H2O em uma região costeira
Análise noturna dos mecanismos que controlam os gradientes de CO2 e H2O em uma região costeira Open
Understanding the water and carbon exchange in the soil-atmosphere system and the mechanisms that control these exchanges are fundamental to have a real and adequate representation of the physical processes involved. Under stable night con…
View article: Understanding nighttime methane signals at the Amazon Tall Tower Observatory (ATTO)
Understanding nighttime methane signals at the Amazon Tall Tower Observatory (ATTO) Open
Methane (CH4) atmospheric mixing ratio measurements are analyzed for the period between June 2013 and November 2018 at the Amazon Tall Tower Observatory (ATTO). We describe the seasonal and diurnal patterns of nighttime events in which CH4…
View article: Planetary boundary layer evolution over the Amazon rainforest in episodes of deep moist convection at the Amazon Tall Tower Observatory
Planetary boundary layer evolution over the Amazon rainforest in episodes of deep moist convection at the Amazon Tall Tower Observatory Open
In this study, high-frequency, multilevel measurements, performed from late October to mid-November of 2015 at a 80 m tall tower of the Amazon Tall Tower Observatory (ATTO) project in the central state of Amazonas, Brazil, were used to dia…
View article: Understanding nighttime methane signals at the Amazon Tall Tower Observatory (ATTO)
Understanding nighttime methane signals at the Amazon Tall Tower Observatory (ATTO) Open
Methane (CH4) atmospheric mixing ratio measurements are analyzed for the period between June 2013 and November 2018 at the Amazon Tall Tower Observatory (ATTO). We describe the seasonal and diurnal patterns of nighttime events in which CH4…