Leaf respiratory carbon loss decreases independent of temperature as the night progresses. Detailed nighttime measurements needed to quantify cumulative respiratory carbon loss at night are challenging under both lab and field conditions. We provide a simple yet accurate approach to represent variation in nighttime temperature‐independent leaf respiratory CO2 efflux in environments with both stable and fluctuating temperatures, which requires no detailed measurements throughout the night. We demonstrate that the inter‐ and intraspecific variation in the cumulative leaf respiratory CO2 efflux at constant temperature, at any length of night, scales linearly with the inter‐ and intraspecific variation in initial measurement of leaf respiratory CO2 efflux at the same temperature at the beginning of the night. This approach informs large‐scale predictions of cumulative leaf respiratory CO2 efflux, which is needed to understand plant carbon economy in global change studies as well as in global modeling and eddy covariance monitoring of the land–atmosphere exchange of CO2.

中文翻译：

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简单准确地表示累积夜间叶片呼吸 CO2 外排


随着夜晚的进行，叶片呼吸碳损失与温度无关。在实验室和现场条件下，量化夜间累积呼吸碳损失所需的详细夜间测量都具有挑战性。我们提供了一种简单而准确的方法来表示在温度稳定和波动的环境中与夜间温度无关的叶片呼吸 CO2 外排的变化，这不需要整夜进行详细测量。我们证明，在恒温下，在任何夜晚的长度下，累积叶片呼吸 CO2 外排的种间和种内变化与夜间开始时相同温度下叶片呼吸 CO2 外排的初始测量的种间和种内变化呈线性关系。这种方法为叶片累积呼吸 CO2 外排的大规模预测提供了信息，这对于在全球变化研究以及 CO2 陆地-大气交换的全球建模和涡度协方差监测中了解植物碳经济性是必要的。