@article{PAR00003593,
  title = {{O}n the late northward propagation of the {W}est {A}frican monsoon in summer 2006 in the region of {N}iger/{M}ali},
  author = {{D}robinski, {P}. and {B}astin, {S}. and {J}anicot, {S}erge and {B}ock, {O}. and {D}abas, {A}. and {D}elville, {P}. and {R}eitebuch, {O}. and {S}ultan, {B}enjamin},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his paper investigates the fine-scale dynamical processes at the origin of the late northward migration of the monsoon flow in summer 2006 in the region of {N}iger and {M}ali (onset on 3 {J}uly 2006 compared to the climatological onset date, 24 {J}une). {C}ompared to a 28-year climatology, 2006 {NCEP}-2 reanalyses show evidence of an anomalous pattern during 10 days between 25 {J}une and 3 {J}uly 2006, characterized by the {A}frican {E}asterly {J}et ({AEJ}) blowing from the northeast along a narrow northeast/southwest band located over the {H}oggar and {A}ir mountains associated with an unusually strong northeasterly harmattan in the lee of the mountains. {U}sing data collected during the {A}frican {M}onsoon {M}ultidisciplinary {A}nalysis ({AMMA}) experiment and mesoscale numerical simulations, this study shows evidence of interaction between the {AEJ} and the orography supported by the reduced gravity shallow water theory which explains the enhancement of the harmattan downstream of the {H}oggar and {A}ir mountains in summer 2006. {T}he enhanced harmattan contributes to move southward the intertropical discontinuity ({ITD}) defined as the interface between the cool moist southwesterly monsoon flow and the warm dry harmattan. {F}inally, an interaction between the {ITD} and {A}frican {E}asterly waves contributes to propagate the {ITD} southward retreat about 1500 km to the west of the {H}oggar and {A}ir mountains.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch-{A}tmospheres},
  volume = {114},
  numero = {},
  pages = {{D}09108},
  ISSN = {0148-0227},
  year = {2009},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00003593},
}