A multi-model approach to constrain the atmospheric hydrogen budget

Krishnan, Srinath; Skeie, Ragnhild Bieltvedt; Hodnebrog, Øivind; Myhre, Gunnar; Sand, Maria; Sandstad, Marit; Bryant, Hannah; Hauglustaine, Didier A.; Paulot, Fabien; Prather, Michael; Stevenson, David

doi:10.5194/acp-26-9509-2026

Articles | Volume 26, issue 13

https://doi.org/10.5194/acp-26-9509-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-9509-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 13

Research article

|

07 Jul 2026

Research article |

| 07 Jul 2026

A multi-model approach to constrain the atmospheric hydrogen budget

Srinath Krishnan, Ragnhild Bieltvedt Skeie, Øivind Hodnebrog, Gunnar Myhre, Maria Sand, Marit Sandstad, Hannah Bryant, Didier A. Hauglustaine, Fabien Paulot, Michael Prather, and David Stevenson

Data sets

CESM2-WACCM data for A multi-model approach to constrain the atmospheric hydrogen budget Øivind Hodnebrog https://doi.org/10.11582/2025.98qdasg2

Model code and software

ciceroOslo/simpleH2: v1.0.1 (v1.0.1) R. B. Skeie et al. https://doi.org/10.5281/zenodo.20643957

Short summary

Hydrogen (H₂) is an indirect greenhouse gas that can affect climate through chemical reactions in the atmosphere. To better understand this impact, it is important to constrain the sources and sinks of hydrogen. Using a suite of three-dimensional and one-dimensional models, we find that atmospheric production of hydrogen is 37–60 Tg/yr and that the geological source of H₂ is much smaller than suggested. More field and isotopic measurements are needed to improve these estimates.