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Interannual variation of terrestrial carbon cycle: Issues and perspectives
Piao, SL (Piao, Shilong)1,2,3; Wang, XH (Wang, Xuhui)1; Wang, K (Wang, Kai)1; Li, XY (Li, Xiangyi)1; Bastos, A (Bastos, Ana)4; Canadell, JG (Canadell, Josep G.)5; Ciais, P (Ciais, Philippe)1,6; Friedlingstein, P (Friedlingstein, Pierre)7; Sitch, S (Sitch, Stephen)8

With accumulation of carbon cycle observations and model developments over the past decades, exploring interannual variation (IAV) of terrestrial carbon cycle offers the opportunity to better understand climate-carbon cycle relationships. However, despite growing research interest, uncertainties remain on some fundamental issues, such as the contributions of different regions, constituent fluxes and climatic factors to carbon cycle IAV. Here we overviewed the literature on carbon cycle IAV about current understanding of these issues. Observations and models of the carbon cycle unanimously show the dominance of tropical land ecosystems to the signal of global carbon cycle IAV, where tropical semiarid ecosystems contribute as much as the combination of all other tropical ecosystems. Vegetation photosynthesis contributes more than ecosystem respiration to IAV of the global net land carbon flux, but large uncertainties remain on the contribution of fires and other disturbance fluxes. Climatic variations are the major drivers to the IAV of net land carbon flux. Although debate remains on whether the dominant driver is temperature or moisture variability, their interaction,that is, the dependence of carbon cycle sensitivity to temperature on moisture conditions, is emerging as key regulators of the carbon cycle IAV. On timescales from the interannual to the centennial, global carbon cycle variability will be increasingly contributed by northern land ecosystems and oceans. Therefore, both improving Earth system models (ESMs) with the progressive understanding on the fast processes manifested at interannual timescale and expanding carbon cycle observations at broader spatial and longer temporal scales are critical to better prediction on evolution of the carbon-climate system.

Subject AreaEcology ; Environmental Sciences
WOS IDWOS:000499286800001
Indexed BySCI
KeywordCo2 Growth-rate Global Fire Emissions Atmospheric Co2 Land-use Future Climate Throughfall Exclusion Emergent Constraints Drought Sensitivity Semiarid Ecosystems Vegetation Dynamics
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Ecology ; Environmental Sciences
Cooperation Status国际
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Document Type期刊论文
Corresponding AuthorPiao, SL (Piao, Shilong)
Affiliation1.Peking Univ, Coll Urban & Environm Sci, Sino French Inst Earth Syst Sci, Beijing 100871, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing, Peoples R China;
3.Chinese Acad Sci, Ctr Excellence Tibetan Earth Sci, Beijing, Peoples R China;
4.Ludwig Maximilians Univ Munchen, Dept Geog, Munich, Germany;
5.CSIRO Oceans & Atmosphere, Global Carbon Project, Canberra, ACT, Australia;
6.UVSQ, CEA, CNRS, Lab Sci Climat & Environm, Gif Sur Yvette, France;
7.Univ Exeter, Coll Engn Math & Phys Sci, Exeter, Devon, England;
8.Univ Exeter, Coll Life & Environm Sci, Exeter, Devon, England.
Recommended Citation
GB/T 7714
Piao, SL ,Wang, XH ,Wang, K ,et al. Interannual variation of terrestrial carbon cycle: Issues and perspectives[J]. GLOBAL CHANGE BIOLOGY,2019,26(1):300-318.
APA Piao, SL .,Wang, XH .,Wang, K .,Li, XY .,Bastos, A .,...&Sitch, S .(2019).Interannual variation of terrestrial carbon cycle: Issues and perspectives.GLOBAL CHANGE BIOLOGY,26(1),300-318.
MLA Piao, SL ,et al."Interannual variation of terrestrial carbon cycle: Issues and perspectives".GLOBAL CHANGE BIOLOGY 26.1(2019):300-318.
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