The term “cool climate” is often used in wine, but what does it actually mean? We know that some regions are hotter than others and can generalize by country or latitudes. Almost all of the wine regions of the world are between the 30˚ and 50˚ latitudes of the northern and southern hemispheres. This is where you can ideally get enough sunlight during the year, but avoid the heat around the tropics and long cold winters near the poles.
Macro climate is the regional climate within these limits that is suitable for quality wine grapes to grow slowly and develop their individual characteristics. Mesoclimate can refer to the Sub region or vineyard whereas microclimate refers to the climate in and around a vine canopy, the restricted space including all parts of the vine above the ground.
Basic Categories of climates are:
•Continental (Long cold winters, humid, hot summers)
•Maritime (Mild winters, long, dry summers. Influence from the ocean)
•Tropical (Hot, humid, short or non-existent winters)
•Mediterranean (Mild winters, long, dry and mild summers)
•Desert/Arid (Dry and hot days, but can have cool nights. Irrigation needed for water)
Can Be Further Defined……
•Cool
•Moderate
•Warm
•Hot
Climate is then defining the way grapes taste: Red grape vines are easy to grow where there is plenty of sunlight and warmth, but can struggle to even flower and produce fruit if planted in a cool climate. The lack of sunshine will keep the color of the skins light and they will not develop the aromatic or tannic structure needed for red wines.
Many white grapes are sensitive to the sun’s intensity, which can cause the skins to burn. Heat and humidity can encourage molds to grow and too much of both sun and heat can over-ripen the fruit which will produce more sugars and lower the acidity.
Even within a generally warm or hot region, there are pockets of “cool climates”. These are typically moderated by a large body of water like the ocean (Pacific) or great lake (Michigan), or can be even a high altitude region (Mendoza Argentina)
Classic cool climate white grapes:
Chardonnay, Riesling, Sauvignon Blanc, Chenin Blanc, Pinot Gris
Cool climate red grapes:
Pinot Noir, Meunier, Gamay, Lagrein, Cabernet Franc
Famous cool climates of the world:
California’s coastal regions: Sonoma Coast, Santa Barbara County, Anderson Valley
Oregon: Willamette Valley
Mexico: Guadalupe Valley
Chile’s coastal regions: Casablanca
Argentina’s high altitude region: Salta
South Africa’s Western Cape
New Zealand’s South Island: Marlborough, Canterbury, Central Otago
Australia: Tasmania, Victoria, Margaret River
France: Loire Valley, Champagne, Chablis, Jura and Savoie
Germany: Mosel
Italy: Aosta, Valtellina, Trentino-Alto Adige, Veneto, Friuli-Venezia Giulia