@article{fdi:010053372, title = {{R}egional climate modelling of the 2006 {W}est {A}frican monsoon : sensitivity to convection and planetary boundary layer parameterisation using {WRF}}, author = {{F}laounas, {E}. and {B}astin, {S}. and {J}anicot, {S}erge}, editor = {}, language = {{ENG}}, abstract = {{R}egional climate model ({RCM}) is a valuable scientific tool to address the mechanisms of regional atmospheric systems such as the {W}est {A}frican monsoon ({WAM}). {T}his study aims to improve our understanding of the impact of some physical schemes of {RCM} on the {WAM} representation. {T}he weather research and forecasting model has been used by performing six simulations of the 2006 summer {WAM} season. {T}hese simulations use all combinations of three convective parameterization schemes ({CPS}s) and two planetary boundary layer schemes ({PBLS}s). {B}y comparing the simulations to a large set of observations and analysis products, we have evaluated the ability of these {RCM} parameterizations to reproduce different aspects of the regional atmospheric circulation of the {WAM}. {T}his study focuses in particular on the {WAM} onset and the rainfall variability simulated over this domain. {A}ccording to the different parameterizations tested, the {PBLS}s seem to have the strongest effect on temperature, humidity vertical distribution and rainfall amount. {O}n the other hand, dynamics and precipitation variability are strongly influenced by {CPS}s. {I}n particular, the {M}ellor-{Y}amada-{J}anjic {PBLS} attributes more realistic values of humidity and temperature. {C}ombined with the {K}ain-{F}ritsch {CPS}, the {WAM} onset is well represented. {T}he different schemes combination tested also reveal the role of different regional climate features on {WAM} dynamics, namely the low level circulation, the land-atmosphere interactions and the meridional temperature gradient between the {G}uinean coast and the {S}ahel.}, keywords = {{R}egional modelling ; {AMMA} field experiment in 2006 ; {P}hysics parameterization schemes ; {W}est {A}frican monsoon onset}, booktitle = {}, journal = {{C}limate {D}ynamics}, volume = {36}, numero = {5-6}, pages = {1083--1105}, ISSN = {0930-7575}, year = {2011}, DOI = {10.1007/s00382-010-0785-3}, URL = {https://www.documentation.ird.fr/hor/fdi:010053372}, }