Articles | Volume 22, issue 22
Research article
18 Nov 2022
Research article |  | 18 Nov 2022

Long-term declines in atmospheric nitrogen and sulfur deposition reduce critical loads exceedances at multiple Canadian rural sites, 2000–2018

Irene Cheng, Leiming Zhang, Zhuanshi He, Hazel Cathcart, Daniel Houle, Amanda Cole, Jian Feng, Jason O'Brien, Anne Marie Macdonald, Julian Aherne, and Jeffrey Brook


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-400', Anonymous Referee #1, 01 Aug 2022
  • RC2: 'Comment on acp-2022-400', Gregory Wetherbee, 02 Aug 2022
  • RC3: 'Comment on acp-2022-400', Anonymous Referee #3, 03 Aug 2022
  • RC4: 'Comment on acp-2022-400', Anonymous Referee #4, 12 Aug 2022
  • AC1: 'Response to reviewers', Irene Cheng, 04 Oct 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Irene Cheng on behalf of the Authors (04 Oct 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (17 Oct 2022) by Joshua Fu
Short summary
Nitrogen (N) and sulfur (S) deposition decreased significantly at 14 Canadian sites during 2000–2018. The greatest decline was observed in southeastern Canada owing to regional SO2 and NOx reductions. Wet deposition was more important than dry deposition, comprising 71–95 % of total N and 45–89 % of total S deposition. While critical loads (CLs) were exceeded at a few sites in the early 2000s, acidic deposition declined below CLs after 2012, which signifies recovery from legacy acidification.
Final-revised paper