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Temperature-based zoning of the Bordeaux wine region.

Abstract : Temperature is a driving climate variable for grapevine development and grape ripening kinetics. The current study first reports interpolation of daily minimum and maximum temperature data by a weather station network from 2001 to 2005 in the Bordeaux (France) region by means of regression kriging using terrain, satellite and land-cover derived covariates. Second it analyses the interpolation procedure errors in agroclimatic indices by means of cross validation and then it compares the field observations of grapevine phenology to temperature-based predicted phenology applied to interpolated data. Finally it proposes a simple method to perform a zoning of Bordeaux vineyards based upon the spatialized prediction of the day on which grape sugar content reaches 200 g.L-1. The zoning performed shows large potential differences in grape maturity date (up to 20 days) induced by temperature spatial variability in a low relief area.
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https://hal.archives-ouvertes.fr/hal-02056427
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Benjamin Bois, Daniel Joly, Hervé Quénol, Philippe Pieri, Jean-Pierre Gaudillère, et al.. Temperature-based zoning of the Bordeaux wine region.. OENO One, Institut des Sciences de la Vigne et du Vin (Université de Bordeaux), 2018, 52 (4), pp.291-306. ⟨10.20870/oeno-one.2018.52.4.1580⟩. ⟨hal-02056427⟩

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