globalchange  > 气候变化事实与影响
DOI: 10.1002/2014GB004931
Scopus记录号: 2-s2.0-85027919673
论文题名:
Benchmarking the seasonal cycle of CO2 fluxes simulated by terrestrial ecosystem models
作者: Peng S; , Ciais P; , Chevallier F; , Peylin P; , Cadule P; , Sitch S; , Piao S; , Ahlström A; , Huntingford C; , Levy P; , Li X; , Liu Y; , Lomas M; , Poulter B; , Viovy N; , Wang T; , Wang X; , Zaehle S; , Zeng N; , Zhao F; , Zhao H
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期:1
起始页码: 46
结束页码: 64
语种: 英语
英文关键词: carbon cycle ; CO2 ; GPP ; NEE ; seasonal cycle ; TCCON
Scopus关键词: atmospheric gas ; benchmarking ; boundary condition ; carbon dioxide ; carbon flux ; ecosystem modeling ; net ecosystem exchange ; Northern Hemisphere ; seasonal variation ; terrestrial ecosystem
英文摘要: We evaluated the seasonality of CO2 fluxes simulated by nine terrestrial ecosystem models of the TRENDY project against (1) the seasonal cycle of gross primary production (GPP) and net ecosystem exchange (NEE) measured at flux tower sites over different biomes, (2) gridded monthly Model Tree Ensembles-estimated GPP (MTE-GPP) and MTE-NEE obtained by interpolating many flux tower measurements with a machine-learning algorithm, (3) atmospheric CO2 mole fraction measurements at surface sites, and (4) CO2 total columns (XCO2) measurements from the Total Carbon Column Observing Network (TCCON). For comparison with atmospheric CO2 measurements, the LMDZ4 transport model was run with time-varying CO2 fluxes of each model as surface boundary conditions. Seven out of the nine models overestimate the seasonal amplitude of GPP and produce a too early start in spring at most flux sites. Despite their positive bias for GPP, the nine models underestimate NEE at most flux sites and in the Northern Hemisphere compared with MTE-NEE. Comparison with surface atmospheric CO2 measurements confirms that most models underestimate the seasonal amplitude of NEE in the Northern Hemisphere (except CLM4C and SDGVM). Comparison with TCCON data also shows that the seasonal amplitude of XCO2 is underestimated by more than 10% for seven out of the nine models (except for CLM4C and SDGVM) and that the MTE-NEE product is closer to the TCCON data using LMDZ4. From CO2 columns measured routinely at 10 TCCON sites, the constrained amplitude of NEE over the Northern Hemisphere is of 1.6 ± 0.4 gC m-2 d-1, which translates into a net CO2 uptake during the carbon uptake period in the Northern Hemisphere of 7.9 ± 2.0 PgC yr-1. © 2014. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78013
Appears in Collections:气候变化事实与影响

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作者单位: Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Laboratoire de Glaciologie et Géophysique de l'Environnement, UMR5183, UJF Grenoble 1, Grenoble, France; Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China; School of Geography, University of Exeter, Exeter, United Kingdom; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden; Centre for Ecology and Hydrology, Wallingford, United Kingdom; Centre for Ecology and Hydrology, Penicuik, United Kingdom; Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom; Institute on Ecosystems, Department of Ecology, Montana State University, Bozeman, United States; Max Planck Institute for Biogeochemistry, Jena, Germany; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States

Recommended Citation:
Peng S,, Ciais P,, Chevallier F,et al. Benchmarking the seasonal cycle of CO2 fluxes simulated by terrestrial ecosystem models[J]. Global Biogeochemical Cycles,2015-01-01,29(1)
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