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Apport de l'analyse des cycles diurnes de nébulosité et de radiation solaire pour comprendre le cycle saisonnier moyen d'activité photosynthétique de la forêt en Afrique Centrale.

Abstract : To better understand the Central Africa forests sensitivity to climate variability, we jointly analyse the mean annual cycles of greenness, rainfall, cloudiness and solar radiation for the target region 0-5°N/12-19°E using high resolution satellite data. Our results demonstrate the importance of the diurnal scale for understanding the mean annual cycles of rainfall, cloudiness and solar radiation and the way they shape those of forest greenness. They also suggest that whereas the March-May rainy season appears optimal for greenness especially because of favorable light conditions, water availability is the main controlling factor in December-January the main dry season and in February at the start of the first vegetative season. Regarding the little dry season and the second rainy season (July-October) light availability might be the main limiting factor to forests photosynthetic activity.
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https://hal.archives-ouvertes.fr/hal-01359864
Contributor : Rémi Laffont <>
Submitted on : Monday, September 5, 2016 - 9:58:02 AM
Last modification on : Wednesday, October 7, 2020 - 1:15:20 PM

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  • HAL Id : hal-01359864, version 1

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Nathalie Philippon, B. de Lapparent, V. Gond, S. Bigot, Yao Télesphore Brou, et al.. Apport de l'analyse des cycles diurnes de nébulosité et de radiation solaire pour comprendre le cycle saisonnier moyen d'activité photosynthétique de la forêt en Afrique Centrale.. 29ème Colloque de l'Association Internationale de Climatologie, Jul 2016, Besançon, France. pp.217-222. ⟨hal-01359864⟩

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