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• W2783163725 endingPage "2306" @default.
• W2783163725 startingPage "2287" @default.
• W2783163725 abstract "Abstract. The accuracy of hydrological predictions in snow-dominated regions deeply depends on the quality of the snowpack simulations, with dynamics that strongly affect the local hydrological regime, especially during the melting period. With the aim of reducing the modelling uncertainty, data assimilation techniques are increasingly being implemented for operational purposes. This study aims to investigate the performance of a multivariate sequential importance resampling – particle filter scheme, designed to jointly assimilate several ground-based snow observations. The system, which relies on a multilayer energy-balance snow model, has been tested at three Alpine sites: Col de Porte (France), Torgnon (Italy), and Weissfluhjoch (Switzerland). The implementation of a multivariate data assimilation scheme faces several challenging issues, which are here addressed and extensively discussed: (1) the effectiveness of the perturbation of the meteorological forcing data in preventing the sample impoverishment; (2) the impact of the parameter perturbation on the filter updating of the snowpack state; the system sensitivity to (3) the frequency of the assimilated observations, and (4) the ensemble size.The perturbation of the meteorological forcing data generally turns out to be insufficient for preventing the sample impoverishment of the particle sample, which is highly limited when jointly perturbating key model parameters. However, the parameter perturbation sharpens the system sensitivity to the frequency of the assimilated observations, which can be successfully relaxed by introducing indirectly estimated information on snow-mass-related variables. The ensemble size is found not to greatly impact the filter performance in this point-scale application." @default.
• W2783163725 created "2018-01-26" @default.
• W2783163725 creator A5013087919 @default.
• W2783163725 creator A5013347495 @default.
• W2783163725 creator A5027127553 @default.
• W2783163725 creator A5031266525 @default.
• W2783163725 date "2018-07-12" @default.
• W2783163725 modified "2023-10-13" @default.
• W2783163725 title "A particle filter scheme for multivariate data assimilation into a point-scale snowpack model in an Alpine environment" @default.
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• W2783163725 doi "https://doi.org/10.5194/tc-12-2287-2018" @default.
• W2783163725 hasPublicationYear "2018" @default.
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