N2O

Global Nitrous oxide budget (GNB)

The LOAC is a key component of the GNB. Our team has synthesized estimates of N2O emissions from inland waters (IW: streams, rivers, lakes, reservoirs), estuaries and coastal vegetated ecosystems (ECV), and the continental shelves (CS) using a consistent spatial framework. In the context of the upcoming GNB (Tian et al., 2024) our assessment has been gridded, and where relevant, decomposed into a natural and anthropogenic component flux. The contribution of the shelves as a hotspot of natural N2O emissions is an important finding of the upcoming budget.

Publications: Tian, et al. 2020; Tian et al., 2024

Leads: P. Raymond, P. Regnier

Contributors:
H. W. Bange, S. Berthet, D. Bianchi, M. Hu, R. Lauerwald, T. Maavara, M. Manizza, P. Raymond, L. Resplandy, J. A. Rosentreter, H. Tian, Y. Yao and P. Regnier

Regional budget

Present-day water-air N2O emissions 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 ECV and CS while trends are also resolved for IWs.

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

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