Climate change might cause an early shedding of leaves if trees have stored enough carbon The presence of leaves on deciduous trees not only marks the changing of the seasons, but also defines the period of time in which trees store carbon from the air in leaves, wood, and roots. Warming winters causing earlier spring-leaf emergence is a widespread pattern of climate-change impacts across temperate tree species and their locations (1). Much more idiosyncratic is the timing of leaf senescence (deterioration), which offers no clear indication of whether future warming will cause an extended autumn growing season that leads to greater carbon-storage potential (2). On page 1066 of this issue, Zani et al. (3) demonstrate that there might be limits to how much carbon a tree can use or store in a single year. Further, if all carbon needs are met, leaves might senesce earlier rather than later in the autumn.

中文翻译：

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盈余和压力控制秋季时机

如果树木储存了足够的碳，气候变化可能会导致树叶过早脱落落叶树上的树叶不仅标志着季节的变化，而且还定义了树木将空气中的碳储存在树叶、木材中的时间段。 , 和根。冬季变暖导致春季树叶提前出现是气候变化影响温带树种及其位置的普遍模式 (1)。更为特殊的是叶片衰老（恶化）的时间，它没有明确表明未来变暖是否会导致秋季生长季节延长，从而导致更大的碳储存潜力（2）。在本期第 1066 页，Zani 等人。(3) 证明一棵树在一年内可以使用或储存多少碳可能存在限制。此外，如果所有碳需求都得到满足，