Consulta: subjectFacets:"Sensible heat flux"
Registros recuperados: 5
Data/hora: 01/06/2024 17:55:30

Review and assessment of latent and sensible heat flux accuracy over the global oceans
Provedor de dados: 5
Autores: Bentamy, Abderrahim; Piolle, Jean-francois; Grouazel, Antoine; Danielson, R.; Gulev, S.; Paul, Frederic; Azelmat, Hamza; Mathieu, P. P.; Von Schuckmann, Karina; Sathyendranath, S.; Evers-king, H.; Esau, I.; Johannessen, J. A.; Clayson, C. A.; Pinker, R. T.; Grodsky, S. A.; Bourassa, M.; Smith, S. R.; Haines, K.; Valdivieso, M.; Merchant, C. J.; Chapron, Bertrand; Anderson, A.; Hollmann, R.; Josey, S. A.
For over a decade, several research groups have been developing air-sea heat flux information over the global ocean, including latent (LHF) and sensible (SHF) heat fluxes over the global ocean. This paper aims to provide new insight into the quality and error characteristics of turbulent heat flux estimates at various spatial and temporal scales (from daily upwards). The study is performed within the European Space Agency (ESA) Ocean Heat Flux (OHF) project. One of the main objectives of the OHF project is to meet the recommendations and requirements expressed by various international programs such as the World Research Climate Program (WCRP) and Climate and Ocean Variability, Predictability, and Change (CLIVAR), recognizing the need for better...
Tipo: Text
Palavras-chave: Ocean Heat Flux; Latent heat flux; Sensible heat flux; Ocean heat content; Scatterometer; Surface wind; Specfic air humidity; OceanSites; Remotely sensed data.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00403/51403/53729.pdf

Using Scintillometry to Estimate Sensible Heat Fluxes over Water: First Insights
Provedor de dados: 5
Autores: Bouin, Marie-noelle; Legain, D.; Traulle, O.; Belamari, S.; Caniaux, G.; Fiandrino, Annie; Lagarde, Franck; Barrie, J.; Moulin, E.; Bouhours, G.
An extra large aperture scintillometer (XLAS) was used over several months across the Thau Lagoon (South of France) to retrieve one-wavelength scintillation and, thence, sensible heat flux. We present the experiment with the XLAS, an eddy-covariance station and meteorological stations measuring on or near the Thau Lagoon. Changes implemented to adapt the scintillometry processing schemes to the above water conditions are presented together with a full error budget, including sensitivity tests to the relevant parameters of the scintillometer processing scheme. The XLAS error budget amounts to 16% (systematic part) +/- 50% (random part). Sensible heat fluxes obtained using the XLAS under unstable atmospheric conditions are then compared to eddy-covariance...
Tipo: Text
Palavras-chave: Air-sea fluxes; Eddy covariance; Footprint; Monin-Obukhov similarity theory; Scintillometry; Sensible heat flux.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19621/17483.pdf

Energy balance measurements over a banana orchard in the Semiarid region in the Northeast of Brazil
Provedor de dados: 86
Autores: Santos,Carlos Antonio Costa dos; Silva,Bernardo Barbosa da; Rao,Tantravahi Venkata Ramana; Neale,Christopher Michael Usher.
The objective of this work was to evaluate the reliability of eddy covariance measurements, analyzing the energy balance components, evapotranspiration and energy balance closure in dry and wet growing seasons, in a banana orchard. The experiment was carried out at a farm located within the irrigation district of Quixeré, in the Lower Jaguaribe basin, in Ceará state, Brazil. An eddy covariance system was used to measure the turbulent flux. An automatic weather station was installed in a grass field to obtain the reference evapotranspiration (ET0) from the combined FAO-Penman-Monteith method. Wind speed and vapor pressure deficit are the most important variables on the evaporative process in both growing seasons. In the dry season, the heat fluxes have a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Musa; Dry season; Eddy covariance; Latent heat flux; Sensible heat flux; Wet season.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001100001

Validation of the Deardorff model for estimating energy balance components for a sugarcane crop
Provedor de dados: 63
Autores: Rolim,Glauco de Souza; Escobedo,João Francisco; Oliveira,Amauri Pereira.
The quantification of the available energy in the environment is important because it determines photosynthesis, evapotranspiration and, therefore, the final yield of crops. Instruments for measuring the energy balance are costly and indirect estimation alternatives are desirable. This study assessed the Deardorff's model performance during a cycle of a sugarcane crop in Piracicaba, State of São Paulo, Brazil, in comparison to the aerodynamic method. This mechanistic model simulates the energy fluxes (sensible, latent heat and net radiation) at three levels (atmosphere, canopy and soil) using only air temperature, relative humidity and wind speed measured at a reference level above the canopy, crop leaf area index, and some pre-calibrated parameters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy budget; Net radiation; Latent heat flux; Sensible heat flux; Microclimate.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400001

Hourly interaction between wind speed and energy fluxes in Brazilian Wetlands - Mato Grosso - Brazil
Provedor de dados: 42
Autores: RODRIGUES,THIAGO R.; CURADO,LEONE F.A.; PEREIRA,VINICIUS M.R.; SANCHES,LUCIANA; NOGUEIRA,JOSÉ S.
ABSTRACT Matter and energy flux dynamics of wetlands are important to understand environmental processes that govern biosphere-atmosphere interactions across ecosystems. This study presents analyses about hourly interaction between wind speed and energy fluxes in Brazilian Wetlands - Mato Grosso - Brazil. This study was conducted in Private Reserve of Natural Heritage (PRNH SESC, 16º39'50''S; 56º47'50''W) in Brazilian Wetland. According to Curado et al. (2012), the wet season occurs between the months of January and April, while the June to September time period is the dry season. Results presented same patterns in energies fluxes in all period studied. Wind speed and air temperature presented same patterns, while LE was relative humidity presented inverse...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy balance; Latent heat flux; Linear regression; Micrometeorology; Pantanal; Sensible heat flux.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000602195