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Differences in the temperature dependence of wetland CO2 and CH4 emissions vary with water table depth

Author

Listed:
  • Hongyang Chen

    (Fudan University)

  • Xiao Xu

    (Fudan University)

  • Changming Fang

    (Fudan University)

  • Bo Li

    (Fudan University)

  • Ming Nie

    (Fudan University)

Abstract

Wetland CH4 emissions have been demonstrated to be more sensitive than wetland CO2 emissions to increasing temperatures, which may result in a greater relative contribution of CH4 to total GHG emissions under climate warming. However, it is not clear whether this greater sensitivity occurs globally across diverse hydrologic regimes. Here, we evaluate the temperature dependence of CO2 and CH4 emissions on water table depth using a global database and show similarities in the temperature dependence of CO2 and CH4 emissions. A lower water table is associated with a decrease in the temperature dependence of CH4 emissions and a higher water table has the opposite effect. Water table depth does not affect the temperature dependence of CO2 emissions. Our findings suggest the stimulatory effect of increasing temperature on wetland CH4 emissions may not always be stronger than that on CO2 emissions and depends on the wetland water table.

Suggested Citation

  • Hongyang Chen & Xiao Xu & Changming Fang & Bo Li & Ming Nie, 2021. "Differences in the temperature dependence of wetland CO2 and CH4 emissions vary with water table depth," Nature Climate Change, Nature, vol. 11(9), pages 766-771, September.
    • Handle: RePEc:nat:natcli:v:11:y:2021:i:9:d:10.1038_s41558-021-01108-4
    DOI: 10.1038/s41558-021-01108-4
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    Cited by:

    1. Qing Ma & Yongjun Gao & Bo Sun & Jianlong Du & Hong Zhang & Ding Ma, 2024. "Grave-to-cradle dry reforming of plastics via Joule heating," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Yunying Li & Wenjie Fan & Guni Xiang & Zhihao Xu, 2023. "Evaluating the Feedback of the Reservoir Methane Cycle to Climate Warming under Hydrological Uncertainty," Sustainability, MDPI, vol. 15(12), pages 1-14, June.

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