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  Regional contribution to variability and trends of global gross primary productivity

Chen, M., Rafique, R., Asrar, G. R., Bond-Lamberty, B., Ciais, P., Zhao, F., Reyer, C. P. O., Ostberg, S., Chang, J., Ito, A., Yang, J., Zeng, N., Kalnay, E., West, T., Leng, G., Francois, L., Munhoven, G., Henrot, A., Tian, H., Pan, S., Nishina, K., Viovy, N., Morfopoulos, C., Betts, R., Schaphoff, S., Steinkamp, J., Hickler, T. (2017): Regional contribution to variability and trends of global gross primary productivity. - Environmental Research Letters, 12, 10, 105005.
https://doi.org/10.1088/1748-9326/aa8978

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 Creators:
Chen, M.1, Author
Rafique, R.1, Author
Asrar, G. R.1, Author
Bond-Lamberty, B.1, Author
Ciais, P.1, Author
Zhao, Fang2, Author              
Reyer, Christopher P. O.2, Author              
Ostberg, Sebastian2, Author              
Chang, J.1, Author
Ito, A.1, Author
Yang, J.1, Author
Zeng, N.1, Author
Kalnay, E.1, Author
West, T.1, Author
Leng, G.1, Author
Francois, L.1, Author
Munhoven, G.1, Author
Henrot, A.1, Author
Tian, H.1, Author
Pan, S.1, Author
Nishina, K.1, AuthorViovy, N.1, AuthorMorfopoulos, C.1, AuthorBetts, R.1, AuthorSchaphoff, Sibyll2, Author              Steinkamp, J.1, AuthorHickler, T.1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

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 Abstract: Terrestrial gross primary productivity (GPP) is the largest component of the global carbon cycle and a key process for understanding land ecosystems dynamics. In this study, we used GPP estimates from a combination of eight global biome models participating in the Inter-Sectoral Impact-Model Intercomparison Project phase 2a (ISIMIP2a), the Moderate Resolution Spectroradiometer (MODIS) GPP product, and a data-driven product (Model Tree Ensemble, MTE) to study the spatiotemporal variability of GPP at the regional and global levels. We found the 2000–2010 total global GPP estimated from the model ensemble to be 117 ± 13 Pg C yr−1 (mean ± 1 standard deviation), which was higher than MODIS (112 Pg C yr−1), and close to the MTE (120 Pg C yr−1). The spatial patterns of MODIS, MTE and ISIMIP2a GPP generally agree well, but their temporal trends are different, and the seasonality and inter-annual variability of GPP at the regional and global levels are not completely consistent. For the model ensemble, Tropical Latin America contributes the most to global GPP, Asian regions contribute the most to the global GPP trend, the Northern Hemisphere regions dominate the global GPP seasonal variations, and Oceania is likely the largest contributor to inter-annual variability of global GPP. However, we observed large uncertainties across the eight ISIMIP2a models, which are probably due to the differences in the formulation of underlying photosynthetic processes. The results of this study are useful in understanding the contributions of different regions to global GPP and its spatiotemporal variability, how the model- and observational-based GPP estimates differ from each other in time and space, and the relative strength of the eight models. Our results also highlight the models' ability to capture the seasonality of GPP that are essential for understanding the inter-annual and seasonal variability of GPP as a major component of the carbon cycle.

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 Dates: 2017
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1088/1748-9326/aa8978
PIKDOMAIN: Climate Impacts & Vulnerabilities - Research Domain II
PIKDOMAIN: Earth System Analysis - Research Domain I
eDoc: 7776
Research topic keyword: Climate impacts
Research topic keyword: Ecosystems
Research topic keyword: Land use
Model / method: Model Intercomparison
Regional keyword: Global
Organisational keyword: RD2 - Climate Resilience
Organisational keyword: RD1 - Earth System Analysis
Working Group: Earth System Model Development
Working Group: Terrestrial Safe Operating Space
Working Group: Forest and Ecosystem Resilience
Working Group: Land Use and Resilience
 Degree: -

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Title: Environmental Research Letters
Source Genre: Journal, SCI, Scopus, p3, oa
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Pages: - Volume / Issue: 12 (10) Sequence Number: 105005 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/150326