Articles | Volume 23, issue 7
Research article
06 Apr 2023
Research article |  | 06 Apr 2023

Nitrate chemistry in the northeast US – Part 2: Oxygen isotopes reveal differences in particulate and gas-phase formation

Heejeong Kim, Wendell W. Walters, Claire Bekker, Lee T. Murray, and Meredith G. Hastings


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-622', Pete D. Akers, 18 Nov 2022
  • RC2: 'Comment on acp-2022-622', Anonymous Referee #2, 30 Nov 2022
  • AC1: 'Comment on acp-2022-622', Wendell Walters, 08 Feb 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Wendell Walters on behalf of the Authors (08 Feb 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (17 Feb 2023) by Jan Kaiser
AR by Wendell Walters on behalf of the Authors (24 Feb 2023)  Manuscript 
Short summary
Atmospheric nitrate has an important impact on human and ecosystem health. We evaluated atmospheric nitrate formation pathways in the northeastern US utilizing oxygen isotope compositions, which indicated a significant difference between the phases of nitrate (i.e., gas vs. particle). Comparing the observations with model simulations indicated that N2O5 hydrolysis chemistry was overpredicted. Our study has important implications for improving atmospheric chemistry model representation.
Final-revised paper