Final answer:
The Riserva versions of Barolo, Barbaresco, Gattinara, and Amarone della Valpolicella require 62, 50, 47, and 48 months of aging, respectively, each with specific conditions for wood barrel and bottle aging.
Step-by-step explanation:
The Riserva designation for Italian wines indicates a longer aging process, which varies based on the regulations for each Denominazione di Origine Controllata e Garantita (DOCG) wine. Let's look at the minimum aging requirements for the Riserva version of the wines in question:
- Barolo - Requires a total of 62 months of aging, starting from November 1st of the harvest year, of which at least 18 months must be in wood barrels.
- Barbaresco - Requires a total of 50 months of aging, starting from November 1st of the harvest year, with at least 9 months in wood barrels.
- Gattinara - The Riserva must be aged for a minimum of 47 months, starting from November 1st of the harvest year, with at least 24 months in wood and 6 months in bottle.
- Amarone della Valpolicella - For the Riserva, aging requirements are 4 years from the January 1st following the grape harvest.
The specific aging requirements are part of what distinguishes these wines and contributes to their unique character and complexity.