Niu Ben, Zhang Xianzhou, Piao Shilong, Janssens Ivan A, Fu Gang, He Yongtao, Zhang Yangjian, Shi Peili, Dai Erfu, Yu Chengqun, Zhang Jing, Yu Guirui, Xu Ming, Wu Jianshuang, Zhu Liping, Desai Ankur R, Chen Jiquan, Bohrer Gil, Gough Christopher M, Mammarella Ivan, Varlagin Andrej, Fares Silvano, Zhao Xinquan, Li Yingnian, Wang Huiming, Ouyang Zhu
Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Sci Adv. 2021 Apr 9;7(15). doi: 10.1126/sciadv.abc7358. Print 2021 Apr.
Warming-induced carbon loss through terrestrial ecosystem respiration () is likely getting stronger in high latitudes and cold regions because of the more rapid warming and higher temperature sensitivity of ( ). However, it is not known whether the spatial relationship between and temperature also holds temporally under a future warmer climate. Here, we analyzed apparent values derived from multiyear observations at 74 FLUXNET sites spanning diverse climates and biomes. We found warming-induced decline in is stronger at colder regions than other locations, which is consistent with a meta-analysis of 54 field warming experiments across the globe. We predict future warming will shrink the global variability of values to an average of 1.44 across the globe under a high emission trajectory (RCP 8.5) by the end of the century. Therefore, warming-induced carbon loss may be less than previously assumed because of homogenization in a warming world.
由于高纬度和寒冷地区升温更快且陆地生态系统呼吸（）对温度更敏感，变暖导致的陆地生态系统呼吸碳排放可能会增强。然而，在未来气候变暖的情况下，陆地生态系统呼吸与温度之间的空间关系在时间上是否依然成立尚不清楚。在此，我们分析了来自74个通量网（FLUXNET）站点多年观测数据得出的表观陆地生态系统呼吸值，这些站点涵盖了不同的气候和生物群落。我们发现，与其他地区相比，寒冷地区因变暖导致的陆地生态系统呼吸下降更为强烈，这与一项对全球54个田间增温实验的荟萃分析结果一致。我们预测，在高排放情景（代表性浓度路径8.5）下，到本世纪末，未来变暖将使全球陆地生态系统呼吸值的变异性缩小至平均1.44。因此，在气候变暖的世界中，由于陆地生态系统呼吸的同质化，变暖导致的碳损失可能比之前设想的要少。
