Skip to Main content Skip to Navigation
Theses

L'aléa gélif printanier dans le vignoble marnais en Champagne. Modélisation spatiale à une échelle fine des écoulements de l'air et des températures minimales

Abstract : Due to its northern location, the Champagne vineyard is particularly sensitive to frosts occurring in spring just after the restart of the buds. In order to understand this climatic constraint at the topoclimatic scales, which are relevant for a vineyard, we used climatic data (temperature, cloud cover and wind) coming from a dense network of 23 meteorological stations in the Marne vineyard (for the six springs 1998-2003) as well as altitude and land cover data. Firstly, we study the spatial and temporal variabilities of minimum temperatures and winds. By the mean of different statistical methods (univariate to multivariate), we characterize the spring night topoclimate of the Marne vineyard. We observe the role of topography, for example the position of the stations on the hillsides, on the spatial distribution of minimum temperatures. Moreover, we show the existence of slope winds which develop gradually during the night. We apply then several interpolation methods (geostatistic and multicriteria) to our data in order to obtain a frost risk estimate for the whole vineyard. The multicriteria approach is the most efficient due to its ability to take into account the station environment. The built models explain quite well the spatial distribution of minimum temperatures. Finally, with the aim of integrating the wind effects in our models, we simulate the Meso NH numerical model for one day corresponding to radiative conditions which yield a strong cooling and variability. The outputs, in qualitative agreement with the observations, illustrate well the interactions between slope winds and the general wind and allow locating the cold air accumulation zones.
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00008906
Contributor : Malika Madelin <>
Submitted on : Wednesday, March 30, 2005 - 1:42:24 PM
Last modification on : Tuesday, January 19, 2021 - 11:08:12 AM
Long-term archiving on: : Friday, April 2, 2010 - 9:12:48 PM

Identifiers

  • HAL Id : tel-00008906, version 1

Citation

Malika Madelin. L'aléa gélif printanier dans le vignoble marnais en Champagne. Modélisation spatiale à une échelle fine des écoulements de l'air et des températures minimales. Géographie. Université Paris-Diderot - Paris VII, 2004. Français. ⟨tel-00008906⟩

Share

Metrics

Record views

713

Files downloads

2784