The correction of soil heat flux measurements to derive an accurate surface energy balance by the Bowen ratio method

Silans, Alain; Monteny, Bruno; Lhomme, Jean

doi:10.1016/s0022-1694(96)03187-3

Cited by 28 publications

(9 citation statements)

References 9 publications

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“…Geralmente, a técnica mais utilizada para determinar o fluxo de calor no solo (G) é conhecida como método combinado. SILANS et al (1997) não encontraram diferenças significativas entre os valores de evapotranspiração estimados com o método de balanço de energia pela razão de Bowen, quando utilizaram G obtido pelo método combinado ou por placas enterradas na profundidade de 0,025 m.…”

Section: Instalação Dos Sistemas De Balanço De Radiação E Medições MIunclassified

Balanço de energia e estimativa da evapotranspiração em culturas irrigadas de maracujazeiro pelo método da razão de Bowen

et al. 2007

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A cultura do maracujazeiro-amarelo tem tido grande expansão da área cultivada no Estado de São Paulo e, apesar da importância da irrigação para a cultura, há poucos estudos sobre sua utilização. Este trabalho foi realizado na área experimental de irrigação, na Fazenda Areão, do Departamento de Engenharia Rural, da Escola Superior de Agricultura "Luiz de Queiroz" - ESALQ/USP (Piracicaba - SP). Foram coletados dados de saldo de radiação, fluxo de calor no solo, gradientes de temperatura e pressão de vapor do ar com o objetivo de avaliar a partição da energia disponível e a evapotranspiração em cultivo de maracujazeiros em dois sistemas de plantio (linhas de cultivo norte-sul e leste-oeste). O método da razão de Bowen foi utilizado na determinação dos fluxos de calor sensível e latente. O saldo de radiação não foi influenciado pelo sistema de plantio, sendo equivalente a 60% da radiação global. O componente de maior contribuição no balanço de energia foi o calor latente de evaporação ocorrendo imediatamente após a chuva ou irrigação. A utilização do modelo de análise e exclusão de intervalos em que o método da Razão de Bowen falha, melhora a estimativa da evapotranspiração.

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Section: Instalação Dos Sistemas De Balanço De Radiação E Medições MIunclassified

Balanço de energia e estimativa da evapotranspiração em culturas irrigadas de maracujazeiro pelo método da razão de Bowen

et al. 2007

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“…Accurate determination of ground soil heat flux, G 0 , is required to evaluate surface energy balance (de Silans et al 1997;Heusinkveld et al 2004;Roxy et al 2014), to estimate soil evaporation (Kampf et al 2005;Heitman et al 2010;Yao et al 2013), and to describe water and vapor transformation processes in vadose zone (Yamanaka et al 1997;Saito et al 2006;Bittelli et al 2008;Wang et al 2011aWang et al , 2011bZhang et al 2015). However, measurement of G 0 has still been a challenging task for researchers till now.…”

Section: Introductionmentioning

confidence: 99%

Estimation of ground heat flux from soil temperature over a bare soil

Wang

et al. 2016

Theor Appl Climatol

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Ground soil heat flux, G 0 , is a difficult-to-measure but important component of the surface energy budget. Over the past years, many methods were proposed to estimate G 0 ; however, the application of these methods was seldom validated and assessed under different weather conditions. In this study, three popular models (force-restore, conduction-convection, and harmonic) and one widely used method (plate calorimetric), which had well performance in publications, were investigated using field data to estimate daily G 0 on clear, cloudy, and rainy days, while the gradient calorimetric method was regarded as the reference for assessing the accuracy. The results showed that harmonic model was well reproducing the G 0 curve for clear days, but it yielded large errors on cloudy and rainy days. The force-restore model worked well only under rainfall condition, but it was poor to estimate G 0 under rain-free conditions. On the contrary, the conduction-convection model was acceptable to determine G 0 under rain-free conditions, but it generated large errors on rainfall days. More importantly, the plate calorimetric method was the best to estimate G 0 under different weather conditions compared with the three models, but the performance of this method is affected by the placement depth of the heat flux plate. As a result, the heat flux plate was recommended to be buried as close as possible to the surface under clear condition. But under cloudy and rainy conditions, the plate placed at depth of around 0.075 m yielded G 0 well. Overall, the findings of this paper provide guidelines to acquire more accurate estimation of G 0 under different weather conditions, which could improve the surface energy balance in field.

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“…A recent study by Bateni and Entekhabi (2012) showed that the land surface temperature can implicitly contain the signature to the surface energy partitioning through linear stability analysis. The accurate determination of the soil thermal field, therefore, is essential in establishing and assessing the surface energy balance closure and has attracted extensive research effort concerned with climate, weather and atmospheric dynamics (de Silans et al, 1997;Foken, 2008;Heusinkveld et al, 2004;McCumber and Pielke, 1981).…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of soil thermal field from a single depth measurement

Wang

2012

Journal of Hydrology

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The correction of soil heat flux measurements to derive an accurate surface energy balance by the Bowen ratio method

Cited by 28 publications

References 9 publications

Balanço de energia e estimativa da evapotranspiração em culturas irrigadas de maracujazeiro pelo método da razão de Bowen

Balanço de energia e estimativa da evapotranspiração em culturas irrigadas de maracujazeiro pelo método da razão de Bowen

Estimation of ground heat flux from soil temperature over a bare soil

Reconstruction of soil thermal field from a single depth measurement

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