@article{fdi:010049453,
  title = {{E}volution of the stable water isotopic composition of the rain sampled along {S}ahelian squall lines},
  author = {{R}isi, {C}. and {B}ony, {S}. and {V}imeux, {F}ran{\c{c}}oise and {C}hong, {M}. and {D}escroix, {L}uc},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the {T}ropics. the stable isotopic composition ({HDO}, ({H}2{O})-{O}-18) of precipitation is strongly modulated by convective activity {T}o better understand how convective processes impact the precipitation isotopic composition, we analyze the isotopic composition of rain collected during the passage of four squall lines over the {S}ahel ({N}iamey. {N}iger) in {A}ugust 2006 during the {A}frican {M}onsoon {M}ultidisciplinary {A}nalysis ({MAMA}) campaign {T}he high-frequency sampling (5-10 mm) of the preciptation allows us to {I}nvestigate the evolution of the precipitation isotopic composition in different phases of the squall lines {D}espite a large variability among the different squall lines, some robust isotopic features appear the {W} shape of the delta {O}-18 evolution and the deuterium excess decrease in the first part of the sit:inform zone {T}o understand more quantitatively how convective processes impact the precipitation isotopic composition. a simple stationary two-dimensional transport model including a representation of cloud microphysics and isotopic fractionation is developed and forced by three-dimensional winds retrieved from the {M}assachusetts {I}nstitute of {T}echnology ({MIT}) radar on 11 {A}ugust 2006 {T}he model reproduces the robust observed features and a large sensitivity to the squall-line dynamics {T}his model suggests that the main controlling factors of the isotopic evolution ale (1) squall-line dynamics. especially the downward advection of an at the rear of the squall lines, affecting the vapour composition and, by isotopic equilibration. the subsequent precipitation composition and (2) rain re-evaporation {T}his suggests that water isotopes have the potential to better constrain squall-line dynamics and rain re-evaporation, and to evaluate the representation of convective processes in numerical models {C}opyright ({C}) 2009 {R}oyal {M}eteorological {S}ociety},
  keywords = {rain evaporation ; {AMMA} ; convection},
  booktitle = {},
  journal = {{Q}uarterly {J}ournal of the {R}oyal {M}eteorological {S}ociety},
  volume = {136},
  numero = {s1},
  pages = {227--242},
  ISSN = {0035-9009},
  year = {2010},
  DOI = {10.1002/qj.485},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049453},
}