Trends and Drivers of Terrestrial Sources and Sinks of Carbon Dioxide: An Overview of the TRENDY Project

Sitch, S; O’Sullivan, M; Robertson, E; Friedlingstein, P; Albergel, C; Anthoni, P; Arneth, A; Arora, VK; Bastos, A; Bastrikov, V; Bellouin, N; Canadell, JG; Chini, L; Ciais, P; Falk, S; Harris, I; Hurtt, G; Ito, A; Jain, AK; Jones, MW; Joos, F; Kato, E; Kennedy, D; Klein Goldewijk, K; Kluzek, E; Knauer, J; Lawrence, PJ; Lombardozzi, D; Melton, JR; Nabel, JEMS; Pan, N; Peylin, P; Pongratz, J; Poulter, B; Rosan, TM; Sun, Q; Tian, H; Walker, AP; Weber, U; Yuan, W; Yue, X; Zaehle, S

Trends and Drivers of Terrestrial Sources and Sinks of Carbon Dioxide: An Overview of the TRENDY Project

Sitch, S O’Sullivan, M Robertson, E Friedlingstein, P Albergel, C Anthoni, P Arneth, A Arora, VK Bastos, A Bastrikov, V Bellouin, N Canadell, JG Chini, L Ciais, P Falk, S Harris, I Hurtt, G Ito, A Jain, AK Jones, MW Joos, F Kato, E Kennedy, D Klein Goldewijk, K Kluzek, E Knauer, J

Lawrence, PJ Lombardozzi, D Melton, JR Nabel, JEMS Pan, N Peylin, P Pongratz, J Poulter, B Rosan, TM Sun, Q Tian, H Walker, AP Weber, U Yuan, W Yue, X Zaehle, S

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Publisher:: AMER GEOPHYSICAL UNION
Publication Type:: Journal Article
Citation:: Global Biogeochemical Cycles, 2024, 38, (7)
Issue Date:: 2024-07-01

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Field	Value	Language
dc.contributor.author	Sitch, S
dc.contributor.author	O’Sullivan, M
dc.contributor.author	Robertson, E
dc.contributor.author	Friedlingstein, P
dc.contributor.author	Albergel, C
dc.contributor.author	Anthoni, P
dc.contributor.author	Arneth, A
dc.contributor.author	Arora, VK
dc.contributor.author	Bastos, A
dc.contributor.author	Bastrikov, V
dc.contributor.author	Bellouin, N
dc.contributor.author	Canadell, JG
dc.contributor.author	Chini, L
dc.contributor.author	Ciais, P
dc.contributor.author	Falk, S
dc.contributor.author	Harris, I
dc.contributor.author	Hurtt, G
dc.contributor.author	Ito, A
dc.contributor.author	Jain, AK
dc.contributor.author	Jones, MW
dc.contributor.author	Joos, F
dc.contributor.author	Kato, E
dc.contributor.author	Kennedy, D
dc.contributor.author	Klein Goldewijk, K
dc.contributor.author	Kluzek, E
dc.contributor.author	Knauer, J https://orcid.org/0000-0002-4947-7067
dc.contributor.author	Lawrence, PJ
dc.contributor.author	Lombardozzi, D
dc.contributor.author	Melton, JR
dc.contributor.author	Nabel, JEMS
dc.contributor.author	Pan, N
dc.contributor.author	Peylin, P
dc.contributor.author	Pongratz, J
dc.contributor.author	Poulter, B
dc.contributor.author	Rosan, TM
dc.contributor.author	Sun, Q
dc.contributor.author	Tian, H
dc.contributor.author	Walker, AP
dc.contributor.author	Weber, U
dc.contributor.author	Yuan, W
dc.contributor.author	Yue, X
dc.contributor.author	Zaehle, S
dc.date.accessioned	2025-01-21T03:48:22Z
dc.date.available	2025-01-21T03:48:22Z
dc.date.issued	2024-07-01
dc.identifier.citation	Global Biogeochemical Cycles, 2024, 38, (7)
dc.identifier.issn	0886-6236
dc.identifier.issn	1944-9224
dc.identifier.uri	http://hdl.handle.net/10453/183935
dc.description.abstract	The terrestrial biosphere plays a major role in the global carbon cycle, and there is a recognized need for regularly updated estimates of land-atmosphere exchange at regional and global scales. An international ensemble of Dynamic Global Vegetation Models (DGVMs), known as the “Trends and drivers of the regional scale terrestrial sources and sinks of carbon dioxide” (TRENDY) project, quantifies land biophysical exchange processes and biogeochemistry cycles in support of the annual Global Carbon Budget assessments and the REgional Carbon Cycle Assessment and Processes, phase 2 project. DGVMs use a common protocol and set of driving data sets. A set of factorial simulations allows attribution of spatio-temporal changes in land surface processes to three primary global change drivers: changes in atmospheric CO2, climate change and variability, and Land Use and Land Cover Changes (LULCC). Here, we describe the TRENDY project, benchmark DGVM performance using remote-sensing and other observational data, and present results for the contemporary period. Simulation results show a large global carbon sink in natural vegetation over 2012–2021, attributed to the CO2 fertilization effect (3.8 ± 0.8 PgC/yr) and climate (−0.58 ± 0.54 PgC/yr). Forests and semi-arid ecosystems contribute approximately equally to the mean and trend in the natural land sink, and semi-arid ecosystems continue to dominate interannual variability. The natural sink is offset by net emissions from LULCC (−1.6 ± 0.5 PgC/yr), with a net land sink of 1.7 ± 0.6 PgC/yr. Despite the largest gross fluxes being in the tropics, the largest net land-atmosphere exchange is simulated in the extratropical regions.
dc.language	English
dc.publisher	AMER GEOPHYSICAL UNION
dc.relation.ispartof	Global Biogeochemical Cycles
dc.relation.isbasedon	10.1029/2024GB008102
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0401 Atmospheric Sciences, 0402 Geochemistry, 0405 Oceanography
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.classification	3703 Geochemistry
dc.subject.classification	3704 Geoinformatics
dc.subject.classification	4101 Climate change impacts and adaptation
dc.title	Trends and Drivers of Terrestrial Sources and Sinks of Carbon Dioxide: An Overview of the TRENDY Project
dc.type	Journal Article
utslib.citation.volume	38
utslib.for	0401 Atmospheric Sciences
utslib.for	0402 Geochemistry
utslib.for	0405 Oceanography
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-01-21T03:48:18Z
pubs.issue	7
pubs.publication-status	Published
pubs.volume	38
utslib.citation.issue	7

Abstract:

The terrestrial biosphere plays a major role in the global carbon cycle, and there is a recognized need for regularly updated estimates of land-atmosphere exchange at regional and global scales. An international ensemble of Dynamic Global Vegetation Models (DGVMs), known as the “Trends and drivers of the regional scale terrestrial sources and sinks of carbon dioxide” (TRENDY) project, quantifies land biophysical exchange processes and biogeochemistry cycles in support of the annual Global Carbon Budget assessments and the REgional Carbon Cycle Assessment and Processes, phase 2 project. DGVMs use a common protocol and set of driving data sets. A set of factorial simulations allows attribution of spatio-temporal changes in land surface processes to three primary global change drivers: changes in atmospheric CO2, climate change and variability, and Land Use and Land Cover Changes (LULCC). Here, we describe the TRENDY project, benchmark DGVM performance using remote-sensing and other observational data, and present results for the contemporary period. Simulation results show a large global carbon sink in natural vegetation over 2012–2021, attributed to the CO2 fertilization effect (3.8 ± 0.8 PgC/yr) and climate (−0.58 ± 0.54 PgC/yr). Forests and semi-arid ecosystems contribute approximately equally to the mean and trend in the natural land sink, and semi-arid ecosystems continue to dominate interannual variability. The natural sink is offset by net emissions from LULCC (−1.6 ± 0.5 PgC/yr), with a net land sink of 1.7 ± 0.6 PgC/yr. Despite the largest gross fluxes being in the tropics, the largest net land-atmosphere exchange is simulated in the extratropical regions.

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http://hdl.handle.net/10453/183935