Which Italian term refers to the fog that rolls off the Alps into Piedmont?

The term that refers to the fog rolling off the Alps into Piedmont is "nebbia." This phenomenon plays a crucial role in the region’s viticulture and climate. The fog affects the temperature and humidity levels, creating an ideal environment for grape growing, particularly for varieties like Nebbiolo, which thrives in these conditions. The name "nebbia" not only describes the fog but has also influenced the name of one of Piedmont's most famous grape varieties.

Understanding the climatic impact of nebbia is vital in appreciating how it contributes to the distinct wine characteristics produced in Piedmont. Meanwhile, the other terms relate to different aspects of Italian wine: "Reserve" typically indicates a wine that has been aged longer, "Spumante" refers to sparkling wines, and "Appassimento" is a process in which grapes are dried before fermentation, commonly associated with Amarone wines. Each of these terms has its significance, but they do not relate to the specific climatic phenomenon described in the question.