Radiation Balance and Partitioning of Latent and Sensible Heat Fluxes Over a Lime Orchard in Eastern Amazon

Q4 Earth and Planetary Sciences

Revista Brasileira de Meteorologia Pub Date : 2023-01-13 DOI:10.1590/0102-77863740070

J. Pinto, D. Costa, H. Nunes, Alberto Cruz da Silva Junior, A. M. L. D. Sousa, P. Souza, S. Ortega-Farías

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引用次数: 1

Abstract

Abstract We investigate the balance of radiation and energy over a lime orchard in Eastern Amazon and how it relates to environmental conditions. We found that lime trees aged between 6 and 7 years old reflect 11.0% to 14.5% of incoming shortwave radiation, and the latent heat flux corresponds to 57.6% and 66.6% of the daily net radiation in the dry season (August - November) of 2020, and 2021, respectively. The soil heat flux represents 1% to 2% of the daily net radiation. Evapotranspiration was much lower than the reference evapotranspiration from August to November in 2019 and 2020. Evapotranspiration increased proportionally to the reference evapotranspiration from August to November 2021. This increase may be explained by weather conditions, such as the frequent rainfall during the dry season of 2021, in the same period when the energy for evapotranspiration is higher. Also, the high relative humidity between August and November 2021 may have favored the opening of stomata, increasing the orchard's evapotranspiration. The crop coefficient ranges between 0.74 and 0.84.

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亚马逊东部石灰园辐射平衡与潜热通量和感热通量的分配

摘要我们研究了亚马逊东部一个石灰园的辐射和能量平衡，以及它与环境条件的关系。我们发现，在2020年和2021年旱季（8月至11月），年龄在6至7岁之间的石灰树反射入射短波辐射的11.0%至14.5%，潜热通量分别相当于日净辐射的57.6%和66.6%。土壤热通量占日净辐射的1%至2%。2019年和2020年8月至11月的蒸发蒸腾量远低于参考蒸发蒸腾量。2021年8月至11月，蒸发蒸腾量与参考蒸发蒸腾量成比例增加。这种增加可能是由天气条件造成的，例如2021年旱季的频繁降雨，而同期的蒸散能量较高。此外，2021年8月至11月之间的高相对湿度可能有利于气孔的开放，增加了果园的蒸散量。作物系数介于0.74和0.84之间。

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