@article{PAR00002836,
  title = {{M}osaic versus dual source approaches for modelling the surface energy balance of a semi-arid land},
  author = {{B}oulet, {G}illes and {C}hehbouni, {A}bdelghani and {B}raud, {I}. and {V}auclin, {M}ichel},
  editor = {},
  language = {{ENG}},
  abstract = {{T}wo-layer parameterisation of the surface energy budget proves to be realistic for sparse but homogeneously distributed vegetation. {F}or semi-arid land surfaces however, sparse vegetation is usually interspersed by large patches of unshaded bare soil which may interact directly with the atmosphere with little interference with the vegetation. {T}herefore such surfaces might not be realistically represented by a two-layer parameterisation. {T}he objective of this study is to investigate the issue of representing water and energy transfer processes in arid and semi-arid regions. {T}wo different surface schemes, namely the classic two layer (one-compartment) approach and a two adjacent compartment ("mosaic") approach are used. {T}he performance of both schemes is documented using data sets collected over two sparsely vegetated surfaces in the {S}an {P}edro river basin: homogeneously distributed grassland and heterogeneously distributed shrubs. {I}n the latter case the mosaic scheme seems to be more realistic given the quality of the temperature estimates. {B}ut no clear statement can be made on the efficiency of both schemes for the total fluxes. {O}ver each site, we investigate the possibility of artificially modifying some of the surface parameters in order to get the surface fluxes simulated by the one-compartment scheme to reproduce the two-compartment ones. {T}he "cost" associated with this process in terms of surface temperature estimates is eventually discussed.},
  keywords = {{ZONE} {SEMIARIDE}},
  booktitle = {},
  journal = {{H}ydrology and {E}arth {S}ystem {S}ciences},
  volume = {3},
  numero = {2},
  pages = {247--258},
  year = {1999},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00002836},
}