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Latitudinal Trends in Human Primary Activities: Characterizing the Winter Day as a Synchronizer

Opened Access Latitudinal Trends in Human Primary Activities: Characterizing the Winter Day as a Synchronizer

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Autor: Martín Olalla, José María
Departamento: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Fecha: 2018-03-28
Publicado en: Scientific Reports, 8 (1), 5350-1-5350-21.
Tipo de documento: Artículo
Resumen: This work analyzes time use surveys from 19 countries (17 European and 2 American) in the middle latitude (38–61 degree) accounting for 45% of world population in this range. Time marks for primary activities are contrasted against light/dark conditions. The analysis reveals winter sunrise synchronizes labor start time below 54 degree, occurring within winter civil twilight. Winter sunset is a source of synchronization for labor end times. Winter terminator punctuate meal times in Europe: dinner occurs 3 h after winter sunset time within 1 h; 40% narrower than variability of dinner local times. The sleep-wake cycle of laborers is shown to be related to winter sunrise whereas standard population’s appears to be irrespective of latitude. The significance of the winter terminator depends on two competing factors average labor time (~7 h30 m) and the shortest photoperiod. Winter terminator gains significance when both roughly matches. That is within a latitude range from 38 degree to 54 d...
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Cita: Martín-Olalla, J.M. (2018). Latitudinal Trends in Human Primary Activities: Characterizing the Winter Day as a Synchronizer. Scientific Reports, 8 (1), 5350-1-5350-21.
Tamaño: 2.024Mb
Formato: PDF

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URI: https://hdl.handle.net/11441/74185

DOI: 10.1038/s41598-018-23546-5

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