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Multisite statistical downscaling model for daily precipitation combined by multivariate multiple linear regression and stochastic weather generator

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  • D. Jeong

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  • A. St-Hilaire
  • T. Ouarda
  • P. Gachon

Abstract

This study provides a multi-site hybrid statistical downscaling procedure combining regression-based and stochastic weather generation approaches for multisite simulation of daily precipitation. In the hybrid model, the multivariate multiple linear regression (MMLR) is employed for simultaneous downscaling of deterministic series of daily precipitation occurrence and amount using large-scale reanalysis predictors over nine different observed stations in southern Québec (Canada). The multivariate normal distribution, the first-order Markov chain model, and the probability distribution mapping technique are employed for reproducing temporal variability and spatial dependency on the multisite observations of precipitation series. The regression-based MMLR model explained 16 % ~ 22 % of total variance in daily precipitation occurrence series and 13 % ~ 25 % of total variance in daily precipitation amount series of the nine observation sites. Moreover, it constantly over-represented the spatial dependency of daily precipitation occurrence and amount. In generating daily precipitation, the hybrid model showed good temporal reproduction ability for number of wet days, cross-site correlation, and probabilities of consecutive wet days, and maximum 3-days precipitation total amount for all observation sites. However, the reproducing ability of the hybrid model for spatio-temporal variations can be improved, i.e. to further increase the explained variance of the observed precipitation series, as for example by using regional-scale predictors in the MMLR model. However, in all downscaling precipitation results, the hybrid model benefits from the stochastic weather generator procedure with respect to the single use of deterministic component in the MMLR model. Copyright Springer Science+Business Media B.V. 2012

Suggested Citation

  • D. Jeong & A. St-Hilaire & T. Ouarda & P. Gachon, 2012. "Multisite statistical downscaling model for daily precipitation combined by multivariate multiple linear regression and stochastic weather generator," Climatic Change, Springer, vol. 114(3), pages 567-591, October.
  • Handle: RePEc:spr:climat:v:114:y:2012:i:3:p:567-591
    DOI: 10.1007/s10584-012-0451-3
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    Cited by:

    1. Jin Huang & Fangmin Zhang & Yan Xue & Qi Li, 2016. "Recent changes of extreme dryness/wetness pattern and its possible impact on rice productivity in Jiangsu Province, southeast China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 84(3), pages 1967-1979, December.
    2. repec:eee:energy:v:135:y:2017:i:c:p:833-850 is not listed on IDEAS

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