@article{fdi:010074992,
  title = {{Q}uantifying differences in circulation patterns based on probabilistic models : {IPCC} {AR}4 multimodel comparison for the {N}orth {A}tlantic},
  author = {{R}ust, {H}. {W}. and {V}rac, {M}. and {L}engaigne, {M}atthieu and {S}ultan, {B}enjamin},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he comparison of circulation patterns ({CP}s) obtained from reanalysis data to those from general circulation model ({GCM}) simulations is a frequent task for model validation, downscaling of {GCM} simulations, or other climate change related studies. {H}ere, the authors suggest a set of measures to quantify the differences between {CP}s. {A} combination of clustering using {G}aussian mixture models with a set of related difference measures allows for taking cluster size and shape information into account and thus provides more information than the {E}uclidean distances between cluster centroids. {T}he characteristics of the various distance measures are illustrated with a simple simulated example. {S}ubsequently, a five-component {G}aussian mixture to define circulation patterns for the {N}orth {A}tlantic region from reanalysis data and {GCM} simulations is used. {CP}s are obtained independently for the {NCEP}-{NCAR} reanalysis and the 40-yr {E}uropean {C}entre for {M}edium-{R}ange {W}eather {F}orecasts ({ECMWF}) {R}e-{A}nalysis ({ERA}-40), as well as for twentieth-century simulations from 14 {GCM}s of the {I}ntergovernmental {P}anel on {C}limate {C}hange ({IPCC}) {F}ourth {A}ssessment {R}eport ({AR}4) database. {A}fter discussing the difference of {CP}s based on spherical and nonspherical clusters for the reanalysis datasets, the authors give a detailed evaluation of the cluster configuration for two {GCM}s relative to {NCEP}-{NCAR}. {F}inally, as an illustration, the capability of reproducing the {NCEP}-{NCAR} probability density function (pdf) defining the {G}reenland anticyclone {CP} is evaluated for all 14 {GCM}s, considering that the size and shape of the underlying pdfs complement the commonly used {E}uclidean distance of {CP}s' mean values.},
  keywords = {{ATLANTIQUE} ; {ATLANTIQUE} {NORD}},
  booktitle = {},
  journal = {{J}ournal of {C}limate},
  volume = {23},
  numero = {24},
  pages = {6573--6589},
  ISSN = {0894-8755},
  year = {2010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074992},
}