Variabilité interannuelle des dates de début et de fin de la saison des pluies dans l'arc de déforestation amazonien

Abstract : In Amazonia global downward trend in rainfall is observed throughout the basin, particularly in the south. Onset and end trends of the rainy season are poorly documented, and are thus studied here on the arc of Amazon deforestation from 1982 to 2012, using daily rainfall data. Several methods of detecting dates are compared; nevertheless, Liebmann's method is retained. Trend tests of Mann-Kendall and test break of Pettitt are applied on these dates. No trend to global shift to the entire arc of deforestation is highlighted by the tests, either at the beginning or at the end of the season. In contrast, linear regressions reveal trends on a regional scale.
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Conference papers
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https://halshs.archives-ouvertes.fr/halshs-01021011
Contributor : Vincent Dubreuil <>
Submitted on : Tuesday, July 8, 2014 - 11:04:48 PM
Last modification on : Friday, July 5, 2019 - 12:42:03 PM

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  • HAL Id : halshs-01021011, version 1

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Véronique Michot, Vincent Dubreuil, Josyane Ronchail. Variabilité interannuelle des dates de début et de fin de la saison des pluies dans l'arc de déforestation amazonien. Actes du 27e colloque de l'AIC, Jul 2014, Dijon, France. pp.212-218. ⟨halshs-01021011⟩

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