Adaptation of standardised (FAO and ASCE) procedures of estimating net longwave and shortwave radiation to Mediterranean greenhouse crops
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URI: http://hdl.handle.net/10835/16265
ISSN: 1537-5129
DOI: https://doi.org/10.1016/j.biosystemseng.2023.06.004
ISSN: 1537-5129
DOI: https://doi.org/10.1016/j.biosystemseng.2023.06.004
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Bonachela Castaño, Santiago; Fernández Fernández, María Dolores; Hernández Rodríguez, Joaquín; López Hernández, Juan CarlosFecha
2023-06-17Resumen
Daily net shortwave (Sn,g) and longwave (Ln,g) radiation were both measured in six representative Mediterranean greenhouse crop cycles. Daily Sn,g and Ln,g were firstly estimated with the standardised FAO and ASCE procedures for reference surfaces using meteorological data. Daily Sn,g estimated with a seasonal albedo of 0.23 was generally lower than measured values for most crops (RMSE of 0.66 MJ m−2 d−1). Accurate Sn,g estimates were obtained using a seasonal albedo of 0.16 for all the studied crops (RMSE of 0.33 MJ m−2 d−1). Most crops, sown/transplanted at low densities and grown with high-wire production systems over the cold winter period, presented limited vegetative growth. Consequently, in most cases a substantial soil part was uncovered throughout the whole cycle. Daily Ln,g determined with the standardised procedure was substantially underestimated (RMSE of 4.12 MJ m−2 d−1). The Ln,g is affected by the transmission coefficient of the covering material to the longwave radiatio...
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Greenhouse microclimate