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Latent heat flux over Cabernet Sauvignon vineyard using the Shuttleworth and Wallace model

机译:使用Shuttleworth和Wallace模型的赤霞珠葡萄园的潜热通量

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摘要

The Shuttleworth and Wallace model (SW) was evaluated to estimate latent heat flux above a drip-irrigated Cabernet Sauvignon vineyard, located in the Pencahue Valley, Region del Maule, Chile (35°22′ LS; 71°47′ LW; 150 m above sea level). The performance of the WS model (LEws) was evaluated against the eddy-covariance method (LEed) on a 30 min time interval. Results indicate that the root mean square error (RMSE) and mean absolute error (MAE) were 29 W m?2 and 22 W m?2, respectively. For the vine evapotranspiration (ETv), RMSE was 0.42 mm day?1 and MAE was 0.36 mm day?1. The largest disagreements between LEed and LEws were observed under dry atmospheric conditions. Also, the sensitivity analysis indicates that predicted ETv by the SW model was sensitive to errors of ±30% in leaf area index and mean stomatal resistance, but it was not affected by errors in the estimation of aerodynamic resistances.
机译:对Shuttleworth和Wallace模型(SW)进行了评估,以估计位于智利毛乌尔地区Pencahue谷的滴灌赤霞珠葡萄园上方的潜热通量(南纬35°22′;南纬71°47′; 150 m高于海平面)。在30分钟的时间间隔内,根据涡度协方差方法(LEed )评估了WS模型(LEws )的性能。结果表明,均方根误差(RMSE)和平均绝对误差(MAE)分别为29 W m?2 和22 W m?2 。葡萄藤蒸腾量(ETv)的RMSE为0.42 mm·day?1 ,MAE为0.36 mm·day?1 。在干燥的大气条件下,LEed 和LEws 之间的分歧最大。另外,敏感性分析表明,SW模型预测的ETv对叶面积指数和平均气孔阻力的误差为±30%敏感,但不受气动阻力估计误差的影响。

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  • 来源
    《Irrigation Science》 |2007年第2期|161-170|共10页
  • 作者单位

    Centro de Investigaciòn y Transferencia en Riego y Agroclimatología (CITRA) Facultad de Ciencias Agrarias Universidad de Talca Casilla 747 Talca Chile;

    Institut National de la Recherche Agronomique (INRA) Unité Climat Sol et Environnement Domaine St. Paul Site Agroparc 84914 Avignon Cedex 9 France;

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