The town gives its name to a wine making appellation, Barsac AOC, that produces sweet white wines.

The town and its vineyards are separated from the area of Sauternes to the south by the Ciron river, whose cooling effect is of key importance in encouraging the annual action of the Botrytis fungus on the Sémillon grapes. The area is marginally flatter than its neighbour and its wines are considered to be marginally lighter. The area is however permitted to use the Sauternes appellation.

Sauternes & Barsac 整個產區的位置都非常近河，在加龍（Garonne）河左岸，在炎熱夏季的夜間和早晨所產生的潮濕霧氣是貴腐菌滋生的關鍵條件。貴腐令葡萄水份蒸發後，葡萄風味和酒體等都變得十分濃縮，亦能帶出獨特的貴腐風味。

AOC Barsac

The appellation laws for Sauternes and Barsac are identical in all but the territory they cover. In both cases the grapes may be picked - by hand - only when their must weight reaches 221 grams per liter. The same stipulation for the area's dry white wines is just 162g/l.

There are a few subtle differences between Barsac and other parts of the broader Sauternes region. Sauternes village is slightly hillier, which increases the effects of the mists and ultimately leads to more richly botrytized wines. Barsac's flatter sand and limestone based soils create finer, more elegantly flavored wines.

延伸閱讀：

什麼是貴腐酒 Botrytis？貴在何處？又該如何配搭？

Chateau d' Yquem 滴金酒莊 - Sauternes Premier Cru Superieur 蘇玳列級超一級莊

氣質甜與顏值擔當：蘇岱

德國白酒分級制度 German wine classification

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