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Your search keyword '"Koite, M."' showing total 2 results
Start Over Author "Koite, M." Topic [sdu.stu.cl] sciences of the universe [physics]/earth sciences/climatology
2 results on '"Koite, M."'

1. Agronomy and climatology of a 100 000 km² watershed in West Africa

Author

Louvet , S., Delarue , K., Paturel , J.E., Mahe , G., Vaksman , M., Tiganadaba , L., Vigaud , Nicolas, Roucou , Pascal, Rouche , N., Koite , M., Hydrosciences Montpellier (HSM), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches de Climatologie (CRC), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), S.W. Franks, E. Boegh, E. Blyth, D.M. Hannah & K.K. Yilmaz, Laffont, Rémi, S.W. Franks, E. Boegh, E. Blyth, D.M. Hannah & K.K. Yilmaz, Hydrosciences Montpellier ( HSM ), Institut de Recherche pour le Développement ( IRD ) -Université Montpellier 2 - Sciences et Techniques ( UM2 ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Recherches de Climatologie ( CRC ), and Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
[SDV.SA.AGRO] Life Sciences [q-bio]/Agricultural sciences/Agronomy, [SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, [ SDV.SA.AGRO ] Life Sciences [q-bio]/Agricultural sciences/Agronomy, agroclimatology, statistic analysis, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Sahel, [SDV.SA.AGRO]Life Sciences [q-bio]/Agricultural sciences/Agronomy, agricultural yields, [ SDU.STU.CL ] Sciences of the Universe [physics]/Earth Sciences/Climatology
Abstract

7 pages; International audience; Sahelian regions are considered as particularly vulnerable to climatic variability and change for two reasons: the dominant role of rainfed agriculture in their economies and their weakness of water resources management. The physiological response of an individual plant to the climatic variations of parameters is well documented, but extrapolation to regional food production still remains very dubious. On the Bani, a tributary of the Niger River in Mali, climatic variables representative of the agroclimatic constraints of the cultures (dynamics of the rainy season and occurrence of extreme events) were evaluated from observed past data and simulated future data (regional climatic model WRF). Simple and multiple correlations were established between past data and agricultural yields, but the relations are hardly significant. In these regions in Africa, the climate factor is certainly a necessary condition to explain the agricultural outputs, but not sufficient alone.

Published
2011

2. Past and future spatio-temporal variability of rainfall of the Bani catchment in West Africa

Author

Louvet, S., Paturel, J. E., Gil MAHE, Vigaud, N., Roucou, P., Rouche, N., Koite, M., Hydrosciences Montpellier (HSM), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches de Climatologie (CRC), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), S.W. Franks, E. Boegh, E. Blyth, D.M. Hannah & K.K. Yilmaz, Laffont, Rémi, Hydrosciences Montpellier ( HSM ), Institut de Recherche pour le Développement ( IRD ) -Université Montpellier 2 - Sciences et Techniques ( UM2 ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Recherches de Climatologie ( CRC ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), and S.W. Franks, E. Boegh, E. Blyth, D.M. Hannah & K.K. Yilmaz

Subjects
[SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, West Africa, rainfall, monsoon, spatio-temporal variability, drought, [ SDU.STU.CL ] Sciences of the Universe [physics]/Earth Sciences/Climatology, ComputingMilieux_MISCELLANEOUS
Abstract

6 pages; International audience; Since 1970, on the Bani, main tributary of the upper Niger, annual discharges have decreased by 69% while annual rainfall has decreased only by 15% to 25% over the catchment. Among the possible causes for this very strong discharge decrease changes of precipitation patterns must be explored. Four different methods of spatial interpolation of rainfall fields were compared on intra-seasonal indices (number of dry days, the dry spells, EDI, SPI, etc.) for the period 1950-2006. This study was also conducted on simulated pluviometric data generated by a regional climatic model (WRF) for the 2032-2041 period. The pluviometric deficit is explained by a conjunction of many factors: an earlier end of rainy season, less precipitation during the core of it and an increase of the number of dry spells. The climatic model envisages an increase of annual precipitation amounts compared to the 1981-1990 period, fewer dry spells and shorter droughts.

Published
2011

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