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Rapport Année : 2020

CLIMATE MODELLING AT VINEYARD SCALE IN A CLIMATE CHANGE CONTEXT

Hervé Quénol
Renan Le Roux
Cristian Valeriu Patriche
Chris Foss
  • Fonction : Auteur

Résumé

For most wine growing regions, significant trends in regional climates have been observed. At the same time, important changes in grapevine phenology and grape composition have occurred, with the latter leading to altered alcohol levels and sensory profiles. Although changes in grapevine behaviour are partly attributed to evolving practices, recent climate changes, in particular increasing temperatures, have been major causal factors. As a result, future climate changes are very likely to have key effects on wine quality and style, which over the long term may cause geographical shifts in suitable grapevine varieties and production areas. A changing climate is therefore one of the major environmental and socio-economic issues facing sustainable viticultural development and production over the next century. Various studies on vine’s climate adaptability under different climate change scenarios show that we can expect major upheavals at global level, with the disappearance of some wine-growing regions by 2100. These studies, based specifically on climate simulation, propose fairly “brutal” methods to adapt to climate change, for instance moving wine-growing regions or changing varietals. Studies on the impact of climate change only cover major global wine regions, however, without taking into account the spatial variability of climate on finer scales. However, atmospheric parameters at the level of the boundary layer depend on surface conditions (surface roughness and type), and these can cause significant spatial variability in relatively small areas (from a few square metres to a few square kilometres). A wine’s specific features are determined by these fine-scale variations (e.g. slope, exposure, type of soil, etc.), and it is at the scale of the plot that winemakers manage their estate and adapt to the climate, notably by agricultural practices (tillage, work on the vine, etc.). The spatial variability of climate at local scale should therefore be taken into account when defining a rational climate change adaptation policy (Quénol et al, 2014).
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Dates et versions

hal-04210609 , version 1 (19-09-2023)

Identifiants

  • HAL Id : hal-04210609 , version 1

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Cornelis van Leeuwen, Laure de Rességuier, Valerie Bonnardot, Hervé Quénol, Renan Le Roux, et al.. CLIMATE MODELLING AT VINEYARD SCALE IN A CLIMATE CHANGE CONTEXT. CNRS LETG. 2020. ⟨hal-04210609⟩
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