Global Carbon Budget
The CO2 budget focuses exclusively on anthropogenic fluxes. Taken that anthropogenic perturbations on CO2 air-water exchanges along the LOAC are only beginning to be constrained by global models, these fluxes are currently not included in the GCB and this omission is identified as a shortcoming in the global budget syntheses (see also Canadell et al., chap. 5 AR6 of the IPCC).
Publications: LeQuéré et al., 2013; LeQuéré et al 2014
Leads: P. Ciais, H. Tian, L. Resplandy, F. Lacroix, P. Regnier
Regional budget
Present-day air-water CO2 exchanges in inland waters (IW: streams, rivers, lakes, reservoirs etc…), estuaries and coastal vegetated ecosystems (ECV), and continental shelves (CS) have been quantified and regionalized in the context of RECCAP2, using a fully consistent framework allowing their integration into both land and ocean budgets. Climatological means are provided for IW CO2 emissions and ECV net CO2 uptake while for the CS, the seasonality and trends in CO2 uptake are also resolved.
Publications: Lauerwald et al. 2023a, Lauerwald et al. 2023b; Rosentreter et al., 2023; Resplandy et al., 2024
Leads: R.Lauerwald, L. Resplandy, J. Rosentreter , P. Regnier
Data streams:
Inland Waters
https://doi. org/10.6084/m9.figshare.22492504
Estuaries and Coastal vegetation
https://doi.org/10.6084/m9.figshare.22351267
Continental Shelves:
https://zenodo.org/record/8326096 https://zenodo.org/record/7990823
Contributors:
IW team – R. Lauerwald , G. H. Allen, B. R. Deemer , S. Liu, T. Maavara, P. Raymond, L. Alcott, D. Bastviken, A. Hastie , M. A. Holgerson, M. S. Johnson, B. Lehner, P. Lin, A. Marzadri, L. Ran, H. Tian, X. Yang, Y. Yao, and P. Regnier
ECV team – J. A. Rosentreter, G. G. Laruelle, H. W. Bange, T. S. Bianchi, J. J. M. Busecke, W-J Cai, B. D. Eyre, I. Forbrich, E.Y. Kwon, T. Maavara, N. Moosdorf, R. G. Najjar, V. Sarma, B. Van Dam and P. Regnier
CS team – L. Resplandy, A. Hogikyan, J. D. Müller, R. G. Najjar, H. W. Bange, D. Bianchi, T. Weber, W.-J. Cai, S. C. Doney, K. Fennel, M. Gehlen, J. Hauck, F. Lacroix, P. Landschützer, C. Le Quéré, A. Roobaert, J. Schwinger, S. Berthet, L. Bopp, T. T. T. Chau, M. Dai, N. Gruber, T. Ilyina, A. Kock, M. Manizza, Z. Lachkar, G. G. Laruelle, E. Liao, I. D. Lima, C. Nissen, C. Rödenbeck, R. Séférian, K. Toyama, H. Tsujino, and P. Regnier
Lateral carbon fluxes
In the context of RECCAP2, the GCP-LOAC team has provided the first model ensemble assessment of lateral C fluxes from river to ocean and their speciation (particulate, dissolved inorganic and organic carbon). The resulting product is a climatology of C exports at 0.5°, globally
Publications: Regnier et al., 2022; Liu et al., in review
Leads: M. Liu, P. Raymond, R. Lauerwald, P. Regnier