@inproceedings{fdi:010064489,
  title = {{H}ow surface properties influence mineral dust emissions in the {S}ahelian region ? {A} modelling case study during {AMMA}},
  author = {{B}ouet, {C}hristel and {M}articorena, {B}. and {B}ergametti, {G}. and {R}ajot, {J}ean-{L}ouis and {C}autenet, {G}. and {D}esboeufs, {K}. and {F}ormenti, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}ropical mesoscale convective systems ({MCS}s) are a prominent feature of the {A}frican meteorology. {A} continuous monitoring of the aeolian activity in an experimental site located in {N}iger shows that such events are responsible for the major part of the annual local wind erosion, i.e. for most of the {S}ahelian dust emissions [{R}ajot, 2001]. {H}owever, the net effect of these {MCS}s on mineral dust budget has to be estimated: on the one hand, these systems produce extremely high surface wind velocities leading to intense dust uptake, but on the other hand, rainfalls associated with these systems can efficiently remove the emitted dust from the atmosphere. {H}igh resolution modelling appears as a relevant approach to correctly reproduce the surface meteorology associated with such meteorological systems [{B}ouet et al., submitted]. {T}he question now arising concerns the reliability of surface characteristics available for the {S}ahelian region, especially soil texture and surface roughness, which are critical parameters for dust emissions. {C}ontrary to arid regions, which are now well documented, data is still missing to correctly characterize semi-arid regions like the {S}ahel. {T}his is in particular due to the well pronounced annual cycles of precipitations and vegetation in these regions and to the impact of land-use on surface properties. {T}his study focuses on a case study of dust emission associated with the passage of a {MCS} observed during one of the {S}pecial {O}bserving {P}eriods of the international {A}frican {M}onsoon {M}ultidisciplinary {A}nalysis ({AMMA} – {SOP}s 1-2) program. {T}he simulations were made using the {R}egional {A}tmospheric {M}odeling {S}ystem ({RAMS}, {C}otton et al. [2003]) coupled online with the dust production model developed by {M}articorena and {B}ergametti [1995] and recently improved by {L}aurent et al. [2008] for {A}frica. {T}he sensitivity of dust emission associated with the passage of the {MCS} to surface features is investigated using different data sets of surface properties ({H}armonized {W}orld {S}oil {D}atabase, {HWSD}) and land-use ({GLOBCOVER}). {I}n-situ measurements of dust concentrations (both ground-based and airborne), and of dust emission flux are used to validate the simulations.},
  keywords = {{NIGER} ; {ZONE} {SAHELIENNE}},
  volume = {13},
  numero = {},
  pages = {11567 [1 ]},
  booktitle = {},
  year = {2011},
  ISSN = {1607-7962},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064489},
}