Alpine Viticulture and Climate Change: Environmental Resources and Limitations for Grapevine Ripening in Valtellina, Italy.

The yearly average air temperature (ATY) has a highly significant ( p -value ≤ 0,001) negative regression with DOY15 (R 2 = 0.731; −5.304 d °C −1 ) and DOY20 (R 2 = 0.709; −5.6081 d °C −1 ) and at a lower level (0.01 ≥ p -value > 0,001) with TA (R 2 = 0.456; −1.1891 g L −1 °C −1 ).

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To assess a possible trend in the timing of ripening during the period of study, linear regressions between year and DOY15, DOY20, RL, and TA were set up ( Table 3 ).

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