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Intensification of terrestrial carbon cycle related to El Niño–Southern Oscillation under greenhouse warming

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  • Jin-Soo Kim

    (Pohang University of Science and Technology (POSTECH))

  • Jong-Seong Kug

    (Pohang University of Science and Technology (POSTECH))

  • Su-Jong Jeong

    (Southern University of Science and Technology (SUSTECH))

Abstract

The El Niño/Southern Oscillation (ENSO) drives interannual variation in the global carbon cycle. However, the relationship between ENSO and the carbon cycle can be modulated by climate change due to anthropogenic forcing. We show herein that the sensitivity of the terrestrial carbon flux to ENSO will be enhanced under greenhouse warming by 44% ( ± 15%), indicating a future amplification of carbon–climate interactions. Separating the contributions of the changes in carbon sensitivity reveals that the response of land surface temperature to ENSO and the sensitivity of gross primary production to local temperature are significantly enhanced under greenhouse warming, thereby amplifying the ENSO–carbon-cycle coupling. In a warm climate, depletion of soil moisture increases temperature response in a given ENSO event. These findings suggest that the ENSO-related carbon cycle will be enhanced by hydroclimate changes caused by anthropogenic forcing.

Suggested Citation

  • Jin-Soo Kim & Jong-Seong Kug & Su-Jong Jeong, 2017. "Intensification of terrestrial carbon cycle related to El Niño–Southern Oscillation under greenhouse warming," Nature Communications, Nature, vol. 8(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01831-7
    DOI: 10.1038/s41467-017-01831-7
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