AnaWEGE: a weather generator based on analogues of atmospheric circulation

Abstract. This paper presents a stochastic weather generator based on analogues of circulation (AnaWEGE). Analogues of circulation have been a promising paradigm to analyse climate variability and its extremes. The weather generator uses precomputed analogues of sea-level pressure over the North Atl...

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Bibliographic Details
Published in:Geoscientific Model Development
Main Author: YIOU, P.
Format: Other/Unknown Material
Language:English
Published: European Geosciences Union 2014
Subjects:
Planète et Univers [physics]/Océan
Atmosphère
Planète et Univers [physics]/Interfaces continentales
environnement
North Atlantic
Online Access:https://oskar-bordeaux.fr/handle/20.500.12278/35425
https://doi.org/10.5194/gmd-7-531-2014
Description
Summary:Abstract. This paper presents a stochastic weather generator based on analogues of circulation (AnaWEGE). Analogues of circulation have been a promising paradigm to analyse climate variability and its extremes. The weather generator uses precomputed analogues of sea-level pressure over the North Atlantic. The stochastic rules of the generator constrain the continuity in time of the simulations. The generator then simulates spatially coherent time series of a climate variable, drawn from meteorological observations. The weather generator is tested for European temperatures, and for winter and summer seasons. The biases in temperature quantiles and autocorrelation are rather small compared to observed variability. The ability of simulating extremely hot summers and cold winters is also assessed.

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