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Sitch, Stephen, O’Sullivan, Michael, Robertson, Eddy, Friedlingstein, Pierre, Albergel, Clément, Anthoni, Peter, Arneth, Almut, Arora, Vivek K., Bastos, Ana, Bastrikov, Vladislav, Bellouin, Nicolas, Canadell, Josep G., Chini, Louise, Ciais, Philippe, Falk, Stefanie, Harris, Ian, Hurtt, George, Ito, Akihiko, Jain, Atul K., Jones, Matthew W. 
ORCID: https://orcid.org/0000-0003-3480-7980, Joos, Fortunat, Kato, Etsushi, Kennedy, Daniel, Klein Goldewijk, Kees, Kluzek, Erik, Knauer, Jürgen, Lawrence, Peter J., Lombardozzi, Danica, Melton, Joe R., Nabel, Julia E. M. S., Pan, Naiqing, Peylin, Philippe, Pongratz, Julia, Poulter, Benjamin, Rosan, Thais M., Sun, Qing, Tian, Hanqin, Walker, Anthony P., Weber, Ulrich, Yuan, Wenping, Yue, Xu and Zaehle, Sönke
(2024)
Trends and drivers of terrestrial sources and sinks of carbon dioxide: An overview of the TRENDY Project.
Global Biogeochemical Cycles, 38 (7).
ISSN 0886-6236
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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.
| Item Type: | Article |
|---|---|
| Additional Information: | Data Availability Statement: All TRENDY-v11 data are freely available from the following website: https://globalcarbonbudgetdata.org/. Funding Information: This work is part of the GCP-RECCAP2 project which is supported by the ESA Climate Change Initiative (contract no. 4000123002/18/I-NB), ESA Carbon-RO (4000140982/23/I-EF), European Union's Horizon 2020 research and innovation program under Grant Agreement No. 821003 (project 4C), the UK's Natural Environment Research Council (NE/S015833/1), and the CALIPSO (Carbon Losses in Plants, Soils and Oceans) project, funded through the generosity of Eric and Wendy Schmidt by recommendation of the Schmidt Futures program. H.T. acknowledges funding support from the U.S. National Science Foundation (Grant numbers: 1903722). JGC acknowledges funding from the Australian National Environmental Science Program - Climate Systems Hub. ORNL is managed by UT-Battelle, LLC, for the DOE under contract DE-AC05-1008 00OR22725. E.R. was supported by the Newton Fund through the Met Office Climate Science for Service Partnership Brazil (CSSP Brazil) and by the Met Office Hadley Centre Climate Programme funded by BEIS. Rights Retention Statement: For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising. |
| Uncontrolled Keywords: | dynamic global vegetation models,global carbon budget,land carbon cycle,reccap2,trendy,global and planetary change,environmental chemistry,environmental science(all),atmospheric science ,/dk/atira/pure/subjectarea/asjc/2300/2306 |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences University of East Anglia Research Groups/Centres > Theme - ClimateUEA |
| UEA Research Groups: | Faculty of Science > Research Groups > Climatic Research Unit Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences University of East Anglia Schools > Faculty of Science > Tyndall Centre for Climate Change Research Faculty of Science > Research Centres > Tyndall Centre for Climate Change Research |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 22 Nov 2024 10:30 |
| Last Modified: | 22 Nov 2024 10:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/97753 |
| DOI: | 10.1029/2024GB008102 |
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