@article{fdi:010074898,
  title = {{E}xploiting the spatial pattern of daily precipitation in the analog method for regional temporal disaggregation},
  author = {{C}arreau, {J}ulie and {B}en {M}henni, {N}. and {H}uard, {F}. and {N}eppel, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he analog method relies on the subdaily distribution of analog days - also called fragments - to perform temporal disaggregation. {T}he features that serve to define analog days are generally at the daily scale although they are assumed to convey information on the subdaily scale. {I}n most cases, the only feature used is the daily total at the location of interest. {F}eatures pertaining to the synoptic circulation are also often used although with the purpose of increasing the spatial rather than the temporal resolution. {P}recipitation is conditioned not only on synoptic circulation but also on regional features such as orography. {T}his combined effect is reflected on the spatial pattern of daily precipitation. {W}e propose to rely on descriptions of the spatial pattern to select analog days in order to perform temporal disaggregation. {T}hree analog method variants based on different sets of spatial pattern features, a variant that rely on synoptic circulation alone and a variant that combines synoptic circulation with spatial pattern features are evaluated and compared. {A}ll the features considered characterize a region therefore the same analog day is employed at all the locations within the region. {I}nter-site coherence is thus enforced. {A} leave-one-out procedure is carried out on hourly radar precipitation reanalyses covering a mountainous watershed in the {F}rench {M}editerranean on a 1 km(2) grid over the period 1997-2006. {U}ncertainty is taken into account by generating five realizations of each variant. {P}erformance is measured in terms of return levels (1-20 years) at various temporal scales (1 h to 12 h) and at two spatial scales - grid box and watershed. {T}he proposed regional approach to temporal disaggregation globally preserves inter-site coherence. {T}his can be seen from the relatively good reproduction of the regional pattern of return levels of the study area by all variants. {S}ynoptic circulation conveys less information on the subdaily scale than spatial pattern features. {T}he variant that depends on synoptic circulation alone largely overestimates return levels especially at lower temporal scales (1 h and 3 h). {C}ombining synoptic circulation with spatial pattern features yielded no significant improvement.},
  keywords = {{A}nalog method ; {T}emporal disaggregation ; {S}patial pattern of daily ; precipitation ; {W}eather types ; {S}patial and temporal coherence ; {F}rench ; {M}editerranean ; {FRANCE} ; {CEVENNES} ; {ZONE} {MEDITERRANEENNE}},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {568},
  numero = {},
  pages = {780--791},
  ISSN = {0022-1694},
  year = {2019},
  DOI = {10.1016/j.jhydrol.2018.11.023},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074898},
}