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Table 1 Climate indices used for the assessment of viticultural potential

From: Probabilistic climate change scenarios for viticultural potential in Québec

Name (units) Definition Thresholds (suitability)
CNFD (days) Maximum number of consecutive < 150 (unsuitable)
  days without frost (Tmin >= −2 C) > 150 (low)
   > 156 (moderate)
   > 166 (good)
   > 180 (very good)
DDB10 (C) Growing degree days with base 10 < 900 (unsuitable)
  between April 1st and October 31st > 900 (low)
   > 1000 (moderate)
   > 1100 (good)
   > 1250 (very good)
AWMT (C) Annual winter minimum temperature < −34 (unsuitable)
   > −34 (low)
   > −30 (moderate)
   > −27 (good)
   > −22 (very good)
ANVCD (days) Annual number of very cold days > 30 (unsuitable)
  (< −22 C) < 30 (low)
   < 20 (moderate)
   < 10 (good)
   < 5 (very good)