@article{fdi:010065280,
  title = {{C}onsistency between in situ, model-derived and high-resolution-image-based soil temperature endmembers : towards a robust data-based model for multi-resolution monitoring of crop evapotranspiration},
  author = {{S}tefan, {V}. {G}. and {M}erlin, {O}livier and {E}r-{R}aki, {S}. and {E}scorihuela, {M}. {J}. and {K}habba, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{D}ue to their image-based nature, "contextual" approaches are very attractive to estimate evapotranspiration ({ET}) from remotely-sensed land surface temperature ({LST}) data. {T}heir application is however limited to highly heterogeneous areas where the soil and vegetation temperature endmembers ({T}ends) can be observed at the thermal sensor resolution. {T}his paper aims to develop a simple theoretical approach to estimate {T}ends independently from {LST} images. {S}oil {T}ends are simulated by a soil energy balance model forced by meteorological data. {V}egetation {T}ends are obtained from soil {T}ends and air temperature. {M}odel-derived soil {T}ends are first evaluated with in situ measurements made over an irrigated area in {M}orocco. {T}he root mean square difference ({RMSD}) between modeled and ground-based soil {T}ends is estimated as 2.4 [{GRAPHICS}] {C}. {M}odel-derived soil {T}ends are next compared with the soil {T}ends retrieved from 90-m resolution {ASTER} ({A}dvanced {S}paceborne {T}hermal {E}mission and {R}eflection {R}adiometer) data collected over two irrigated areas in {M}exico and {S}pain. {S}uch a comparison reveals a strong consistency between model-derived and high-resolution image-based soil {T}ends. {A} recent contextual {ET} model ({SEB}-1{S}) is then applied to 90-m resolution and to 1-km resolution (aggregated) {ASTER} data using the model-derived or image-based {T}ends as the input. {T}he {RMSD} between 90-m resolution {SEB}-1{S} and in situ {ET} is estimated as 65 and 82 {W} center dot m [{GRAPHICS}] , and the {RMSD} between 1-km resolution {SEB}-1{S} and aggregated {SEB}-1{S} {ET} is estimated as 78 and 56 {W} center dot m [{GRAPHICS}] for the image-based and model-derived {T}ends, respectively. {I}n light of the above results, {T}ends should be estimated a priori when contextual models are applied to low resolution images. {M}oreover, the consistency over highly heterogeneous areas between model-derived and high-resolution image-based {T}ends provides a meaningful basis for developing mixed modeling observational approaches.},
  keywords = {{MAROC} ; {ESPAGNE} ; {MEXIQUE}},
  booktitle = {},
  journal = {{R}emote {S}ensing},
  volume = {7},
  numero = {8},
  pages = {10444--10479},
  ISSN = {2072-4292},
  year = {2015},
  DOI = {10.3390/rs70810444},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065280},
}