Search Results - "ACEVEDO, O. C."

Turbulent mixing and removal of ozone within an Amazon rainforest canopy by Freire, L. S., Gerken, T., Ruiz‐Plancarte, J., Wei, D., Fuentes, J. D., Katul, G. G., Dias, N. L., Acevedo, O. C., Chamecki, M.

“…Simultaneous profiles of turbulence statistics and mean ozone mixing ratio are used to establish a relation between eddy diffusivity and ozone mixing within…”
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Climatic Consequences of Leaf Presence in the Eastern United States by Fitzjarrald, David R., Acevedo, Otávio C., Moore, Kathleen E.

“…At the time of leaf emergence in deciduous forests, markedly enhanced evapotranspiration leads to a rapid drop in the Bowen ratio. A small fraction of this…”
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A semi-analytical solution for the mean wind profile in the Atmospheric Boundary Layer: the convective case by Buligon, L., Degrazia, G. A., Acevedo, O. C., Szinvelski, C. R. P., Goulart, A. G. O.

“…A novel methodology to derive the average wind profile from the Navier-Stokes equations is presented. The development employs the Generalized Integral…”
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Nocturnal surface-layer characteristics at the bottom of a valley by MORAES, O. L. L, ACEVEDO, O. C, DA SILVA, R, MAGNAGO, R, SIQUEIRA, A. C

“…Nighttime data collected at the bottom of a valley locatedin southern Brazil are studied. The analyzed quantities includemomentum and sensible heat fluxes,…”
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Sunset decay of the convective turbulence with Large-Eddy Simulation under realistic conditions by Rizza, U., Miglietta, M.M., Degrazia, G.A., Acevedo, O.C., Marques Filho, E.P.

“…Large-Eddy Simulation is performed for a single day from the Cooperative Atmosphere-Surface Exchange Study (CASES-99) field program. This study investigates an…”
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Employing Taylor and Heisenberg subfilter viscosities to simulate turbulent statistics in LES models by Degrazia, G.A., Rizza, U., Puhales, F.S., Welter, G.S., Acevedo, O.C., Maldaner, S.

“…A turbulent subfilter viscosity for Large Eddy Simulation (LES) based on the Taylor statistical diffusion theory is proposed. This viscosity is described in…”
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Derivation of an eddy diffusivity coefficient depending on source distance for a shear dominated planetary boundary layer by Alves, I.P., Degrazia, G.A., Buske, D., Vilhena, M.T., Moraes, O.L.L., Acevedo, O.C.

“…In this study an integral and an algebraic formulation for the eddy diffusivities in a shear driven planetary boundary layer are derived for pollutant…”
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Surface layer turbulence parameters over a complex terrain by Moraes, Osvaldo L.L., Acevedo, Otávio C., Degrazia, Gervásio A., Anfossi, Domenico, da Silva, Rodrigo, Anabor, Vagner

“…The structure of the surface boundary layer over homogeneous conditions is nowadays well understood. However, there is no sufficient knowledge of the…”
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Land-use change effects on local energy, water, and carbon balances in an Amazonian agricultural field by Sakai, R.K, Fitzjarrald, D.R, Moraes, O.L.L, Staebler, R.M, Acevedo, O.C, Czikowsky, M.J, Silva, R. da, Brait, E, Miranda, V

“…To study how changing agricultural practices in the eastern Amazon affect carbon, heat and water exchanges, a 20 m tower was installed in a field in August…”
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In the core of the night: Effects of intermittent mixing on a horizontally heterogeneous surface by ACEVEDO, Otavio C, FITZJARRALD, David R

“…Intermittent breakdowns that accompany wind gusts at the surface are responsible for a large fraction of the turbulent exchange between the surface and the…”
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Inferring nocturnal surface fluxes from vertical profiles of scalars in an Amazon pasture by Acevedo, O.C, Moraes, O.L.L, Da Silva, R, Fitzjarrald, D.R, Sakai, R.K, Staebler, R.M, Czikowsky, M.J

“…Ecosystem carbon budgets depend on there being good representative surface flux observations for all land use types during the entire diurnal cycle. In calm…”
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The Amazon Tall Tower Observatory (ATTO): overview of pilot measurements on ecosystem ecology, meteorology, trace gases, and aerosols by Andreae, M. O, Acevedo, O. C, Araùjo, A, Artaxo, P, Barbosa, C. G. G, Barbosa, H. M. J, Brito, J, Carbone, S, Chi, X, Cintra, B. B. L, da Silva, N. F, Dias, N. L, Dias-Júnior, C. Q, Ditas, F, Ditz, R, Godoi, A. F. L, Godoi, R. H. M, Heimann, M, Hoffmann, T, Kesselmeier, J, Könemann, T, Krüger, M. L, Lavric, J. V, Manzi, A. O, Lopes, A. P, Martins, D. L, Mikhailov, E. F, Moran-Zuloaga, D, Nelson, B. W, Nölscher, A. C, Santos Nogueira, D, Piedade, M. T. F, Pöhlker, C, Pöschl, U, Quesada, C. A, Rizzo, L. V, Ro, C.-U, Ruckteschler, N, Sá, L. D. A, de Oliveira Sá, M, Sales, C. B, dos Santos, R. M. N, Saturno, J, Schöngart, J, Sörgel, M, de Souza, C. M, de Souza, R. A. F, Su, H, Targhetta, N, Tóta, J, Trebs, I, Trumbore, S, van Eijck, A, Walter, D, Wang, Z, Weber, B, Williams, J, Winderlich, J, Wittmann, F, Wolff, S, Yáñez-Serrano, A. M

“…The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, and biodiversity. It has already been changed…”
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Planetary boundary layer evolution over the Amazon rainforest in episodes of deep moist convection at the Amazon Tall Tower Observatory by Oliveira, Maurício I, Acevedo, Otávio C, Sörgel, Matthias, Nascimento, Ernani L, Manzi, Antonio O, Oliveira, Pablo E. S, Brondani, Daiane V, Tsokankunku, Anywhere, Andreae, Meinrat O

“…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…”
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On the universality of the dissipation rate functional form and of the autocorrelation function exponential form by Degrazia, Gervásio A., Acevedo, Otávio C., Carvalho, Jonas C., Goulart, Antônio G., Moraes, Osvaldo L.L., Campos Velho, Haroldo F., Moreira, Davidson M.

“…An alternative formulation for the turbulence dissipation rate ε is presented. The development consists on a binomial expansion of an algebraic relation for…”
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Understanding nighttime methane signals at the Amazon Tall Tower Observatory (ATTO) by Botía, Santiago, Gerbig, Christoph, Marshall, Julia, Lavric, Jost V, Walter, David, Pöhlker, Christopher, Holanda, Bruna, Fisch, Gilberto, de Araújo, Alessandro Carioca, Sá, Marta O, Teixeira, Paulo R, Resende, Angélica F, Dias-Junior, Cleo Q, van Asperen, Hella, Oliveira, Pablo S, Stefanello, Michel, Acevedo, Otávio C

“…Methane (CH4) atmospheric mixing ratio measurements are analyzed for the period between June 2013 and November 2018 at the Amazon Tall Tower Observatory…”
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Nighttime wind and scalar variability within and above an Amazonian canopy by Oliveira, Pablo E. S, Acevedo, Otávio C, Sörgel, Matthias, Tsokankunku, Anywhere, Wolff, Stefan, Araújo, Alessandro C, Souza, Rodrigo A. F, Sá, Marta O, Manzi, Antônio O, Andreae, Meinrat O

“…Nocturnal turbulent kinetic energy (TKE) and fluxes of energy, CO2 and O3 between the Amazon forest and the atmosphere are evaluated for a 20-day campaign at…”
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Development of an analytical Lagrangian model for passive scalar dispersion in low-wind speed meandering conditions by Stefanello, M.B., Degrazia, G.A., Mortarini, L., Buligon, L., Maldaner, S., Carvalho, J.C., Acevedo, O.C., Martins, L.G.N., Anfossi, D., Buriol, C., Roberti, D.

“…Describing the effects of wind meandering motions on the dispersion of scalars is a challenging task, since this type of flow represents a physical state…”
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A quasi-experimental coastal region eddy diffusivity applied in the APUGRID model by Maldaner, Silvana, Stefanello, Michel, Martins, Luis Gustavo N., Degrazia, Gervásio Annes, Rizza, Umberto, Roberti, Débora Regina, Puhales, Franciano S., Acevedo, Otávio C.

“…In this study, Taylor statistical diffusion theory and sonic anemometer measurements collected at 11 levels on a 140 m high tower located in a coastal region…”
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Energy Partitioning and Evapotranspiration over a Rice Paddy in Southern Brazil by Timm, Andrea Ucker, Roberti, Débora R., Streck, Nereu Augusto, de Gonçalves, Luis Gustavo G., Acevedo, Otávio Costa, Moraes, Osvaldo L. L., Moreira, Virnei S., Degrazia, Gervásio Annes, Ferlan, Mitja, Toll, David L.

“…During approximately 80% of its growing season, lowland flooded irrigated rice ecosystems in southern Brazil are kept within a 5–10-cm water layer. These…”
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High-Resolution Numerical Weather Simulation at the South Shetland Islands, Antarctic, Using WRF by COMIN, A. N., ACEVEDO, O. C., SOUZA, R. B.

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