Étude de l'influence de l'Oscillation Nord Atlantique sur la variabilité pluviométrique en Guinée
International audience Guinea climate change effects show that drought, late rain and violent flooding are three major hazards. The diagnostic based on observation during thirty years in the present work shows that Guinea is under atmospherically rocking phenomenon which is established between islan...
Main Authors: | , , , |
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Other Authors: | , , |
Format: | Report |
Language: | French |
Published: |
HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03223829 https://hal.archives-ouvertes.fr/hal-03223829/document https://hal.archives-ouvertes.fr/hal-03223829/file/projet%20de%20publication%20Etude%20de%20la%20NAO%20sur%20la%20pluviometrie%20en%20Guin%C3%A9e.pdf |
Summary: | International audience Guinea climate change effects show that drought, late rain and violent flooding are three major hazards. The diagnostic based on observation during thirty years in the present work shows that Guinea is under atmospherically rocking phenomenon which is established between island depression and sweet flag anticyclone Different stages have different significant repercussions on rainfall in the north and north-west of guinea. North-atlantic oscillation fluctuation and the rain full have opposite stages. The NAO positive stage corresponds most of the time to the decrease of rainfall period. It's important to notice that for the farthest northern station; correlation is stronger than the ones located in the south. Les effets du changement climatique en Guinée, montre que la sécheresse, les pluies tardives et violentes et les inondations sont trois risques climatiques majeurs. Sur la base d'observations couvrant une trentaine d'années, montre que la Guinée est sous l’influence du phénomèneclimatique qui s’établit entre la dépression d’Islande et l’anticyclone des Açores. Les différentes phases ont des effets sur la pluviométrie de la Guinée. L’Oscillation Nord Atlantique et la pluviométrie évoluent en opposition de phases. Il est important de noter que pour les stations les plus au Nord, la corrélation est plus forte que pour celles situées plus au sud. |
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