Reference : Regional contribution to variability and trends of global gross primary productivity
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/226118
Regional contribution to variability and trends of global gross primary productivity
English
Chen, Min [> >]
Rafique, Rashid [> >]
Asrar, Ghassem R. [> >]
Bond-Lamberty, Ben [> >]
Ciais, Philippe [> >]
Zhao, Fang [> >]
Reyer, Christopher P. O. [> >]
Ostberg, Sebastian [> >]
Chang, Jinfeng [> >]
Ito, Akihiko [> >]
Yang, Jia [> >]
Zeng, Ning [> >]
Kalnay, Eugenia [> >]
West, Tristram [> >]
Leng, Guoyong [> >]
François, Louis mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques >]
Munhoven, Guy mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) >]
Henrot, Alexandra-Jane mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques >]
Tian, Hanqin [> >]
Pan, Shufen [> >]
Nishina, Kazuya [> >]
Viovy, Nicolas [> >]
Morfopoulos, Catherine [> >]
Betts, Richard [> >]
Schaphoff, Sibyll [> >]
Steinkamp, Jörg [> >]
Hickler, Thomas [> >]
2017
Environmental Research Letters
Institute of Physics Publishing
12
10
105005
Yes (verified by ORBi)
International
1748-9326
Bristol
United Kingdom
[en] 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.
Researchers ; Professionals
http://hdl.handle.net/2268/226118
10.1088/1748-9326/aa8978
http://stacks.iop.org/1748-9326/12/i=10/a=105005

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