Emergent constraints on historical and future global gross primary productivity

© 2024 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 30(2024), 8 vom: 27. Aug., Seite e17479
1. Verfasser: Chen, Xin (VerfasserIn)
Weitere Verfasser: Chen, Tiexi, Liu, Yi Y, He, Bin, Liu, Shuci, Guo, Renjie, Dolman, Han
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article carbon cycle emergent constraint flux tower gross primary productivity remote sensing shared socioeconomic pathway
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520 |a Terrestrial gross primary productivity (GPP) is the largest carbon flux in the global carbon cycle and plays a crucial role in terrestrial carbon sequestration. However, historical and future global GPP estimates still vary markedly. In this study, we reduced uncertainties in global GPP estimates by employing an innovative emergent constraint method on remote sensing-based GPP datasets (RS-GPP), using ground-based estimates of GPP from flux towers as the observational constraint. Using this approach, the global GPP in 2001-2014 was estimated to be 126.8 ± 6.4 PgC year-1, compared to the original RS-GPP ensemble mean of 120.9 ± 10.6 PgC year-1, which reduced the uncertainty range by 39.6%. Independent space- and time-based (different latitudinal zones, different vegetation types, and individual year) constraints further confirmed the robustness of the global GPP estimate. Building on these insights, we extended our constraints to project global GPP estimates in 2081-2100 under various Shared Socioeconomic Pathway (SSP) scenarios: SSP126 (140.6 ± 9.3 PgC year-1), SSP245 (153.5 ± 13.4 PgC year-1), SSP370 (170.7 ± 16.9 PgC year-1), and SSP585 (194.1 ± 23.2 PgC year-1). These findings have important implications for understanding and projecting climate change, helping to develop more effective climate policies and carbon reduction strategies 
650 4 |a Journal Article 
650 4 |a carbon cycle 
650 4 |a emergent constraint 
650 4 |a flux tower 
650 4 |a gross primary productivity 
650 4 |a remote sensing 
650 4 |a shared socioeconomic pathway 
700 1 |a Chen, Tiexi  |e verfasserin  |4 aut 
700 1 |a Liu, Yi Y  |e verfasserin  |4 aut 
700 1 |a He, Bin  |e verfasserin  |4 aut 
700 1 |a Liu, Shuci  |e verfasserin  |4 aut 
700 1 |a Guo, Renjie  |e verfasserin  |4 aut 
700 1 |a Dolman, Han  |e verfasserin  |4 aut 
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