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


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • AC1: 'Comment on acp-2022-810', Lei Duan, 27 Dec 2022
  • RC1: 'Comment on acp-2022-810', Anonymous Referee #1, 05 Jan 2023
    • AC2: 'Reply on RC1', Lei Duan, 30 Mar 2023
  • RC2: 'Comment on acp-2022-810', Anonymous Referee #2, 01 Mar 2023
    • AC3: 'Reply on RC2', Lei Duan, 30 Mar 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Lei Duan on behalf of the Authors (30 Mar 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (13 Apr 2023) by Andreas Engel
RR by Anonymous Referee #1 (17 Apr 2023)
ED: Publish as is (27 Apr 2023) by Andreas Engel
AR by Lei Duan on behalf of the Authors (04 May 2023)
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.
Final-revised paper