@article{fdi:010065706, title = {{R}ole of the {H}oggar massif in the {W}est {A}frican monsoon onset}, author = {{D}robinski, {P}. and {S}ultan, {B}enjamin and {J}anicot, {S}erge}, editor = {}, language = {{ENG}}, abstract = {{I}t has been observed that the {W}est {A}frican monsoon onset is concomitant with the enhancement of the {S}aharan heat low. {W}e show through a combined diagnostic and linear modeling study a possible interaction between northern {A}frica orography and the deepening of the {S}aharan heat low at the time of the monsoon onset. {T}he amplification of an anticyclonic circulation above and north of the {H}oggar massif leads to an increase and a southeasterly-northeasterly rotation of the wind ahead of the {H}oggar which contribute to an increased leeward-trough effect enhancing the {S}aharan heat low. {T}he {A}tlas does not play any role during the monsoon onset but contributes to the mean climatological location of the {S}aharan heat low.}, keywords = {{CLIMATOLOGIE} ; {METEOROLOGIE} ; {GEOMORPHOLOGIE} ; {TEMPERATURE} {DE} {SURFACE} ; {DESERT} ; {CIRCULATION} {ATMOSPHERIQUE} ; {MODELISATION} ; {CHANGEMENT} {CLIMATIQUE} ; {MOUSSON} ; {ALGERIE} ; {SAHARA}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {32}, numero = {1}, pages = {art. no {L}01705 [5 ]}, ISSN = {0094-8276}, year = {2005}, DOI = {10.1029/2004{GL}020710}, URL = {https://www.documentation.ird.fr/hor/fdi:010065706}, }