Certified Sommelier Practice Exam

What type of effect is enhanced in Alsace due to the geography of the Vosges Mountains?

1. Rain shadow effect

2. Temperature inversion

3. Coastal influence

4. Continental effect

The correct answer is: Rain shadow effect

The correct answer is the rain shadow effect. In Alsace, the Vosges Mountains play a significant role in affecting the local climate and weather patterns. As moist air from the west moves towards the mountains, it rises and cools, leading to precipitation on the windward side. Once the air passes over the mountains and descends on the eastern side, it warms and dries out, creating a rain shadow effect. This results in a drier and sunnier climate in the Alsace region, which is beneficial for viticulture. The other options provided do not accurately describe the geographic influence of the Vosges Mountains on Alsace. Temperature inversion generally refers to a situation where warmer air traps cooler air near the surface and is not specifically linked to the mountains' geography. Coastal influence pertains to regions near oceans that experience moderated temperatures and humidity, which is not applicable to Alsace's inland location. The continental effect relates to the broader climate characteristics of areas away from large bodies of water, but it does not directly explain the localized phenomena created by the mountains.