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Brief Communication Climatic Covariates for the Frequency Analysis of Heavy Rainfall in the Mediterranean Region : Volume 11, Issue 9 (15/09/2011)

By Tramblay, Y.

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Book Id: WPLBN0004017645
Format Type: PDF Article :
File Size: Pages 6
Reproduction Date: 2015

Title: Brief Communication Climatic Covariates for the Frequency Analysis of Heavy Rainfall in the Mediterranean Region : Volume 11, Issue 9 (15/09/2011)  
Author: Tramblay, Y.
Volume: Vol. 11, Issue 9
Language: English
Subject: Science, Natural, Hazards
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Neppel, L., Tramblay, Y., & Carreau, J. (2011). Brief Communication Climatic Covariates for the Frequency Analysis of Heavy Rainfall in the Mediterranean Region : Volume 11, Issue 9 (15/09/2011). Retrieved from

Description: Hydrosciences Montpellier, UMR5569, CNRS – IRD-UM1-UM2, Université Montpellier 2, Maison des Sciences de l'Eau, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France. In Mediterranean regions, climate studies indicate for the future a possible increase in the extreme rainfall events occurrence and intensity. To evaluate the future changes in the extreme event distribution, there is a need to provide non-stationary models taking into account the non-stationarity of climate. In this study, several climatic covariates are tested in a non-stationary peaks-over-threshold modeling approach for heavy rainfall events in Southern France. Results indicate that the introduction of climatic covariates could improve the statistical modeling of extreme events. In the case study, the frequency of southern synoptic circulation patterns is found to improve the occurrence process of extreme events modeled via a Poisson distribution, whereas for the magnitude of the events, the air temperature and sea level pressure appear as valid covariates for the Generalized Pareto distribution scale parameter. Covariates describing the humidity fluxes at monthly and seasonal time scales also provide significant model improvements for the occurrence and the magnitude of heavy rainfall events. With such models including climatic covariates, it becomes possible to asses the risk of extreme events given certain climatic conditions at monthly or seasonal timescales. The future changes in the heavy rainfall distribution can also be evaluated using covariates computed by climate models.

Brief communication Climatic covariates for the frequency analysis of heavy rainfall in the Mediterranean region

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