What is the defining feature of Mendoza's wines related to altitude?

The defining feature of Mendoza's wines in relation to altitude is the decreased overall temperature that occurs as the elevation increases. Mendoza, located at the foothills of the Andes Mountains, boasts vineyards at various elevations, often exceeding 1,000 meters (around 3,280 feet). As altitude increases, the temperature typically decreases, which can have a significant impact on the ripening process of grapes. Cooler temperatures allow for a longer growing season, promoting the development of complex flavors while maintaining the freshness and acidity of the fruit.

This cooler climate is important because it helps prevent over-ripening, ensuring that the grapes retain their acidity, which is crucial for balance in the finished wine. This characteristic is particularly beneficial for varietals like Malbec, which thrive in cooler growing conditions that preserve acidity and enhance fruit expression.

Other options such as increased humidity, higher sugar content, and increased acidity levels do not accurately describe the primary influence of altitude in Mendoza. While higher sugar content can be a result of optimal ripening conditions, it is not a defining feature specifically tied to altitude, and similarly, while acidity levels can increase with cooler temperatures, the primary defining feature is the decrease in overall temperature itself.