@article{fdi:010061794, title = {{C}limate variability in the {S}udano-{G}uinean transition area and its impact on vegetation : the case of the {L}amto region in {C}ote d'{I}voire}, author = {{D}iawara, {A}. and {Y}oroba, {F}. and {K}ouadio, {K}. {Y}. and {K}ouassi, {K}. {B}. and {A}ssamoi, {E}. {M}. and {D}iedhiou, {A}rona and {A}ssamoi, {P}.}, editor = {}, language = {{ENG}}, abstract = {{B}ased on unique 50-year datasets from 1962 to 2011, this study diagnoses the variability of climate at {L}amto (6.13 degrees {N}, 5.02 degrees {W}) in {C}ote d'{I}voire. {A} combined pluviothermal index is used to identify climate regions of {W}est {A}frica. {T}he interdecadal change of the climate is analyzed along with a discussion on the {W}est {A}frican {M}onsoon ({WAM}) circulation. {T}he impact of vegetation is also analyzed. {I}t is shown that {L}amto has mainly a subhumid climate but, in some particular years, this area has a humid climate. {T}wo decades (1962-1971 and 2002-2011) exhibit rainfall excess and the last three ones (1972-1981, 1982-1991, and 1992-2001) show a rainfall deficit that affected {W}est {A}frica in the early 1970s. {T}he meridional wind field from 1000 h{P}a to 700 h{P}a is used to study the {WAM} variability. {T}he level of the {WAM} is the lowest (similar to 860-890 h{P}a) during the active period of the northern wind coming from the {S}ahara desert ({N}ovember-{F}ebruary). {D}uring 1962-1971 and 2007-2009, the depth of the monsoon at {L}amto reaches 300 h{P}a with an increase in the rainfall. {A} relationship between potential evapotranspiration and the climate highlights rainfall deficit in 1969 and rainfall excess in 2001-2011.}, keywords = {{COTE} {D}'{IVOIRE}}, booktitle = {}, journal = {{A}dvances in {M}eteorology}, numero = {}, pages = {831414}, ISSN = {1687-9309}, year = {2014}, DOI = {10.1155/2014/831414}, URL = {https://www.documentation.ird.fr/hor/fdi:010061794}, }