Why does Loire Cabernet Franc taste like that?

Characteristically medium-plus acidity. Commonly associated with raspberry, red plum, graphite, bell pepper.

Not claiming: That every wine from this variety shows these characteristics. This is the range across the category, and site and winemaking move wines within and beyond it.

Cooler growing-season temperatures are associated with slower sugar accumulation and with higher retained acidity, because malic acid is respired more slowly at lower temperatures — particularly at night.

Varies: Season length matters as much as temperature. A long cool season can ripen fruit fully while retaining acidity; a short one may not ripen it at all.

Not claiming: That climate puts flavours into grapes. Climate acts on the vine’s physiology, and the picking decision then determines what reaches the bottle.

A wide day–night temperature range is associated with better acid retention, because cool nights slow the respiration that consumes malic acid while warm days continue to ripen the fruit.

Not claiming: That altitude or continentality guarantees high acidity. Both widen diurnal range on average and neither determines the outcome.

Proximity to a large body of water moderates temperature extremes, which is associated with a longer, more even ripening period and a lower risk of both spring frost and extreme summer heat.

Varies: Maritime influence also raises humidity, which raises fungal disease pressure. It is not uniformly an advantage.

Not claiming: That a maritime climate is cool. Maritime describes variability, not temperature.

Fermenting on the skins extracts phenolic compounds, including the tannins that produce astringency. Extraction rises with time, temperature and alcohol level.

Varies: Extraction is not linear. Anthocyanins come out early and quickly; tannins continue throughout and beyond fermentation, and post-fermentation maceration can reduce perceived astringency by polymerising them.

Not claiming: That longer maceration always means more perceived tannin. Extended maceration frequently softens a wine rather than hardening it.

Anthocyanins are extracted from black grape skins during skin contact, which is where red wine colour comes from. Most extraction happens in the first days.

Not claiming: That colour depth indicates quality or body. Nebbiolo is pale and highly tannic; deeply coloured wines can be light-bodied.

Including stems in the ferment, which adds structure, spice and aromatic lift.

Not claiming: That every producer of this style uses this method, or that using it is required.

Highly vintage-dependent. Light, cool-year bottlings are for drinking within three years; ripe years from Chinon, Bourgueil and Saumur-Champigny hold ten to fifteen and turn from crunchy red fruit to graphite and tobacco.

Not claiming: That a wine of this style will develop these characters. Ageing potential varies by producer, vintage and storage, and most wine is better young.