Psychrometry in the thermal comfort diagnosis of production animals: a combination of the systematic review and methodological proposal

de Castro Júnior, Sergio Luís; Silveira, Robson Mateus Freitas; da Silva, Iran José Oliveira

doi:10.1007/s00484-023-02569-2

Int J Biometeorol

2023

DOI: 10.1007/s00484-023-02569-2

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Psychrometry in the thermal comfort diagnosis of production animals: a combination of the systematic review and methodological proposal

Sergio Luís de Castro Júnior,

Robson Mateus Freitas Silveira,

Iran José Oliveira da Silva

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Cited by 2 publications

References 38 publications

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Are there differences in the adaptive profile of hair sheep and their crosses with wool breeds?

Silveira,

Garcia,

de Castro Júnior

et al. 2023

Int J Biometeorol

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Are there differences in the adaptive profile of hair sheep and their crosses with wool breeds?

Silveira,

Garcia,

de Castro Júnior

et al. 2023

Int J Biometeorol

View full text Add to dashboard Cite

Measurement of microclimates in a warming world: problems and solutions

Mitchell,

Maloney,

Snelling

et al. 2024

Journal of Experimental Biology

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As the world warms, it will be tempting to relate the biological responses of terrestrial animals to air temperature. But air temperature typically plays a lesser role in the heat exchange of those animals than does radiant heat. Under radiant load, animals can gain heat even when body surface temperature exceeds air temperature. However, animals can buffer the impacts of radiant heat exposure: burrows and other refuges may block solar radiant heat fully, but trees and agricultural shelters provide only partial relief. For animals that can do so effectively, evaporative cooling will be used to dissipate body heat. Evaporative cooling is dependent directly on the water vapour pressure difference between the body surface and immediate surroundings, but only indirectly on relative humidity. High relative humidity at high air temperature implies a high water vapour pressure, but evaporation into air with 100% relative humidity is not impossible. Evaporation is enhanced by wind, but the wind speed reported by meteorological services is not that experienced by animals; instead, the wind, air temperature, humidity and radiation experienced is that of the animal's microclimate. In this Commentary, we discuss how microclimate should be quantified to ensure accurate assessment of an animal's thermal environment. We propose that the microclimate metric of dry heat load to which the biological responses of animals should be related is black-globe temperature measured on or near the animal, and not air temperature. Finally, when analysing those responses, the metric of humidity should be water vapour pressure, not relative humidity.

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Psychrometry in the thermal comfort diagnosis of production animals: a combination of the systematic review and methodological proposal

Cited by 2 publications

References 38 publications

Are there differences in the adaptive profile of hair sheep and their crosses with wool breeds?

Are there differences in the adaptive profile of hair sheep and their crosses with wool breeds?

Measurement of microclimates in a warming world: problems and solutions

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