Question: What do you call those vineyard wide temperature swings?
Answer: Wide temperature swings in vineyards can be an important factor in helping grapes reach a better balanced even ripeness. The heat from higher daytime develops sugar levels while cooler lower nighttime helps maintain the natural fresh acidity. The word DIURNAL is used to capture these changes or fluctuations in day and night temperatures. The DTR or Diurnal Temperature Range is used as the difference between the daily maximum and minimum temperatures.
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