Champagne Harvest Explorer

Baseline harvest

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Warmed harvest

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Shift

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Model & assumptions

Growing Degree Days (GDD) accumulate daily average temperatures above 10°C baseline. Harvest occurs when cumulative GDD reaches 1350 (Champagne average). This simplified model uses a single threshold, no varietal differences, and monthly average temperatures. Warming adds a uniform offset to daily temperatures. Real phenology depends on variety, rootstock, soil, precipitation, and extreme events not captured here. Source: Reuters report on record-early 2025 harvest; temperature climatology from Champagne region averages.

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