Coincidence of temperature extremes and phenological events of grapevines

A growing number of studies have highlighted the consequences climate change on agriculture, including impacts extremes such as drought, heat waves and frost. The aim this study was to assess influence temperature various phenological events grapevine varieties in Southwest Switzerland (Leytron, Canton Valais). We aimed capture occurrence extreme specific years at different phases rank based their sensitivity thus quantify robustness. Phenological observations (1978–2018) six Vitis vinifera (Arvine, Chardonnay, Chasselas, Gamay, Pinot noir Syrah) were subjected event coincidence analysis. Extreme defined values uppermost or lowermost percentiles timing phenophases daily temperatures within a 30-day window before phenophase occurred. Significantly more occurred Leytron between 2003 2017 than earlier years, with 2007, 2011, 2014 being remarkable terms events. Moreover, bud development flowering experienced significantly other phenophases; however, rate independent phenophase. Based total events, did not differ responses extremes. Therefore, analysis is an appropriate tool clearly affected advancement timings grapevines. However, there no varietal differences response temperatures; thus, additional research warranted outline best adaptation measures.