@unpublished{cheng:meteo-02460851, TITLE = {{A graph clustering approach to localization for adaptive covariance tuning in data assimilation based on state-observation mapping}}, AUTHOR = {Cheng, Sibo and Argaud, Jean-Philippe and Iooss, Bertrand and Pon{\c c}ot, Ang{\'e}lique and Lucor, Didier}, URL = {https://meteofrance.hal.science/meteo-02460851}, NOTE = {working paper or preprint}, YEAR = {2020}, MONTH = Jan, KEYWORDS = {Graph community detection ; Covariance matrices ; Unsupervised learning ; Data assimilation}, PDF = {https://meteofrance.hal.science/meteo-02460851v1/file/Cheng2020.pdf}, HAL_ID = {meteo-02460851}, HAL_VERSION = {v1}, }