Sparkling Wine
Wine with dissolved CO₂ — from champagne to pét-nat, bubbles as a winemaking choice
What It Is
Sparkling wine is any wine with dissolved carbon dioxide (CO₂) in sufficient quantity to produce visible effervescence when poured. The CO₂ can be produced naturally through fermentation or added artificially, though serious sparkling wine is always naturally carbonated.
The Methods
Méthode Traditionnelle (Traditional Method): Used in Champagne, Cava, and many prestige sparkling wines worldwide. A second fermentation occurs in the bottle itself, producing CO₂ that dissolves into the wine under pressure. The spent yeast (lees) is then removed through riddling and disgorgement.
Méthode Ancestrale (Pétillant Naturel): The oldest sparkling method. Wine is bottled before primary fermentation is complete; the CO₂ from the remaining fermentation dissolves into the wine. No second fermentation required. Lower pressure, softer mousse.
Charmat / Tank Method: Second fermentation occurs in a pressurized tank rather than individual bottles. Used for Prosecco and Sekt. Economical and consistent; preserves primary fruit aromas.
Why CO₂ Matters for Natural Wine
Dissolved CO₂ acts as a natural preservative — it displaces oxygen, inhibiting oxidation and slowing microbial activity. This is why naturally made champagne can be shipped and stored with less sulfur than comparable still wines. The pressure protects the wine's integrity.