Comment on “Climate consequences of hydrogen emissions” by Ocko and Hamburg (2022)

Duan, Lei; Caldeira, Ken

doi:https://doi.org/10.5194/acp-23-6011-2023

Articles | Volume 23, issue 10

https://doi.org/10.5194/acp-23-6011-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-6011-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 10

Peer-reviewed comment

|

01 Jun 2023

Peer-reviewed comment |

| 01 Jun 2023

Comment on “Climate consequences of hydrogen emissions” by Ocko and Hamburg (2022)

Lei Duan and Ken Caldeira

Supplement

https://doi.org/10.5194/acp-23-6011-2023-supplement

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Scripts for the paper entitled "Comment on 'Climate consequences of hydrogen emissions' by Ocko and Hamburg (2022)" L. Duan and K. Caldeira https://doi.org/10.5281/zenodo.7346379

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Short summary

Ocko and Hamburg (2022) emphasize the short-term climate impact of hydrogen, and we present an analysis that places greater focus on long-term outcomes. We have derived equations that describe the time-evolving impact of hydrogen and show that higher methane leakage is primarily responsible for the warming potential of blue hydrogen, while hydrogen leakage plays a less critical role. Fossil fuels show more prominent longer-term climate impacts than clean hydrogen under all emission scenarios.