数字农科院2.0

Warming homogenizes apparent temperature sensitivity of ecosystem respiration

文献类型： 外文期刊

作者： 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

作者机构：

期刊名称： Science Advances

ISSN： 2375-2548

年卷期： 2021 年 7 卷 15 期

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收录情况： JCR（2021版） ; EI（2021版）

摘要： Warming-induced carbon loss through terrestrial ecosystem respiration (Re) is likely getting stronger in high latitudes and cold regions because of the more rapid warming and higher temperature sensitivity of Re (Q10). However, it is not known whether the spatial relationship between Q10 and temperature also holds temporally under a future warmer climate. Here, we analyzed apparent Q10 values derived from multiyear observations at 74 FLUXNET sites spanning diverse climates and biomes. We found warming-induced decline in Q10 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 Q10 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 Q10 homogenization in a warming world. Copyright © 2021 The Authors, some rights reserved.

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