An Average Temperature Increase For Grape Growing

1135 Words Nov 17th, 2015 5 Pages
The figure 4 shows that between the years 2009 and 2014, there has been an average temperature increase of between 1 to 2 centigrade. 2009 is prior to the official onset of the drought. According to the Winker Index for vineyard suitability, in 2010 30% of vineyards in Napa Valley fell into Class IV which is considered “hot” for grape growing. One can assume through this image that more vineyards will feel the temperature increase and raise to Class IV or even Class V (too hot). A warmer climate leads to drier soils which add stress to vineyards. In addition, the drought has also led to increased wildfires which can be devastating to specific vineyards. For example, Lake County Winegrape Commission estimates that the wildfires in September of 2015, in a region north of Napa Valley, may have burned approximately 15% of the area’s vineyard. The “smoke taint” is a serious concern as it causes wine to taste and smell like a “wet ashtray”. As the temperature rises, the climate gets drier and water sources become even scarcer, combatting an increase of wildfires and smoke will be an uphill battle for vineyards.

Precipitation will be difficult to predict. As seen with the biomes above, more rainfall is assumed in the northern regions on California, and less will be assumed in the southern regions. Hail can devastate and destroy grapes and vines as well. Also, precipitation during the wrong times of the season effect ripening. In addition, fog production is…
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