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Weather Regime Dependence of Extreme Value Statistics for Summer Temperature and Precipitation : Volume 15, Issue 3 (06/05/2008)

By Yiou, P.

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Book Id: WPLBN0003972983
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: Weather Regime Dependence of Extreme Value Statistics for Summer Temperature and Precipitation : Volume 15, Issue 3 (06/05/2008)  
Author: Yiou, P.
Volume: Vol. 15, Issue 3
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2008
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Li, Z. X., Nogaj, M., Yiou, P., & Goubanova, K. (2008). Weather Regime Dependence of Extreme Value Statistics for Summer Temperature and Precipitation : Volume 15, Issue 3 (06/05/2008). Retrieved from http://worldebookfair.org/


Description
Description: Laboratoire des Sciences du Climat et de l'Environnement/IPSL, CE Saclay l'Orme des Merisiers, 91191 Gif-sur-Yvette, France. Extreme Value Theory (EVT) is a useful tool to describe the statistical properties of extreme events. Its underlying assumptions include some form of temporal stationarity in the data. Previous studies have been able to treat long-term trends in datasets, to obtain the time dependence of EVT parameters in a parametric form. Since there is also a dependence of surface temperature and precipitation to weather patterns obtained from pressure data, we determine the EVT parameters of those meteorological variables over France conditional to the occurrence of North Atlantic weather patterns in the summer. We use a clustering algorithm on geopotential height data over the North Atlantic to obtain those patterns. This approach refines the straightforward application of EVT on climate data by allowing us to assess the role of atmospheric variability on temperature and precipitation extreme parameters. This study also investigates the statistical robustness of this relation. Our results show how weather regimes can modulate the different behavior of mean climate variables and their extremes. Such a modulation can be very different for the mean and extreme precipitation.

Summary
Weather regime dependence of extreme value statistics for summer temperature and precipitation

Excerpt
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