@article{fdi:010073093,
  title = {{U}nderstanding the influence of orography on the precipitation diurnal cycle and the associated atmospheric processes in the central {A}ndes},
  author = {{J}unquas, {C}l{\'e}mentine and {T}akahashi, {K}. and {C}ondom, {T}homas and {E}spinoza, {J}. {C}. and {C}havez, {S}. and {S}icart, {J}. {E}. and {L}ebel, {T}hierry},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the tropical {A}ndes, the identification of the present synoptic mechanisms associated with the diurnal cycle of precipitation and its interaction with orography is a key step to understand how the atmospheric circulation influences the patterns of precipitation variability on longer time-scales. {I}n particular we aim to better understand the combination of the local and regional mechanisms controlling the diurnal cycle of summertime ({DJF}) precipitation in the {N}orthern {C}entral {A}ndes ({NCA}) region of {S}outhern {P}eru. {A} climatology of the diurnal cycle is obtained from 15 wet seasons (2000-2014) of 3-hourly {TRMM}-3{B}42 data (0.25{A} degrees x 0.25{A} degrees) and swath data from the {TRMM}-2{A}25 precipitation radar product (5 km x 5 km). {T}he main findings are: (1) in the {NCA} region, the diurnal cycle shows a maximum precipitation occurring during the day (night) in the western (eastern) side of the {A}ndes highlands, (2) in the valleys of the {C}uzco region and in the {A}mazon slope of the {A}ndes the maximum (minimum) precipitation occurs during the night (day). {T}he {WRF} ({W}eather {R}esearch and {F}orecasting) regional atmospheric model is used to simulate the mean diurnal cycle in the {NCA} region for the same period at 27 km and 9 km horizontal grid spacing and 3-hourly output, and at 3 km only for the month of {J}anuary 2010 in the {C}uzco valleys. {S}ensitivity experiments were also performed to investigate the effect of the topography on the observed rainfall patterns. {T}he model reproduces the main diurnal precipitation features. {T}he main atmospheric processes identified are: (1) the presence of a regional-scale cyclonic circulation strengthening during the afternoon, (2) diurnal thermally driven circulations at local scale, including upslope (downslope) wind and moisture transport during the day (night), (3) channelization of the upslope moisture transport from the {A}mazon along the {A}purimac valleys toward the western part of the cordillera.},
  keywords = {{P}recipitation ; {D}iurnal cycle ; {C}entral {A}ndes ; {WRF} model ; {M}oisture flux ; {P}eru ; {PEROU} ; {ANDES}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {50},
  numero = {11-12},
  pages = {3995--4017},
  ISSN = {0930-7575},
  year = {2018},
  DOI = {10.1007/s00382-017-3858-8},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073093},
}