Decelerating Autumn CO<inf>2</inf> Release With Warming Induced by Attenuated Temperature Dependence of Respiration in Northern Ecosystems

Dan Liu, Shilong Piao, Tao Wang, Xuhui Wang, Xiaoyi Wang, Jinzhi Ding, Philippe Ciais, Josep Peñuelas, Ivan Janssens

    Research output: Contribution to journalArticleResearchpeer-review

    2 Citations (Scopus)

    Abstract

    ©2018. American Geophysical Union. All Rights Reserved. Feedbacks from the carbon cycle in boreal and arctic ecosystems can significantly affect climate change, but the effects of climate change on the high-latitude carbon cycle during the dormant period remain uncertain. By analyzing the long-term atmospheric CO2 concentration record from Point Barrow in Alaska, we show that warming significantly boosts net CO2 release in autumn over the period 1974–2014. But this warming-stimulated effect has been attenuated since 1997. This deceleration of net CO2 release with warming is ascribed to the attenuation in respiration response to temperature rather than changing relationship between temperature and productivity or changes in atmospheric transport, fossil fuel emissions, or air-sea CO2 exchanges. The attenuated respiration response is likely due to decoupling between temperature and plant-derived carbon inputs to soil for decomposition. Contrary to previous suggestions, warming no longer results in a higher autumn net CO2 release.
    Original languageEnglish
    Pages (from-to)5562-5571
    JournalGeophysical Research Letters
    Volume45
    Issue number11
    DOIs
    Publication statusPublished - 16 Jun 2018

    Fingerprint Dive into the research topics of 'Decelerating Autumn CO<inf>2</inf> Release With Warming Induced by Attenuated Temperature Dependence of Respiration in Northern Ecosystems'. Together they form a unique fingerprint.

    Cite this