The aim was to investigate temperature drivers of the spring phenology of 12 flowering events and six leafing events. Boreal phenology has previously exhibited only a modest response to temperature, but record-breaking temperatures in March 2020 led to some extreme phenological timing and provided the opportunity for a more rigorous look at the nature and complexity of the relationship between temperature and phenology.

中文翻译：

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极端温度有助于确定物候反应的阈值

目的是调查 12 个开花事件和 6 个叶子事件的春季物候的温度驱动因素。北方物候此前仅对温度表现出适度的反应，但 2020 年 3 月创纪录的温度导致了一些极端的物候时机，并为更严格地研究温度与物候之间关系的性质和复杂性提供了机会。