Articles | Volume 15, issue 3
Research article
 | Highlight paper
09 Feb 2022
Research article | Highlight paper |  | 09 Feb 2022

Evaluating the PurpleAir monitor as an aerosol light scattering instrument

James R. Ouimette, William C. Malm, Bret A. Schichtel, Patrick J. Sheridan, Elisabeth Andrews, John A. Ogren, and W. Patrick Arnott


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Nice model and useful evaluation of the PurpleAir sensor for a unique, more direct application', R Subramanian, 15 Oct 2021
    • AC1: 'Reply on RC1', Elisabeth Andrews, 01 Dec 2021
  • RC2: 'Comment on amt-2021-170', Anonymous Referee #2, 20 Oct 2021
    • AC2: 'Reply on RC2', Elisabeth Andrews, 01 Dec 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Elisabeth Andrews on behalf of the Authors (20 Dec 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (24 Dec 2021) by Darin Toohey
AR by Elisabeth Andrews on behalf of the Authors (03 Jan 2022)  Author's response    Manuscript
Short summary
We show that the low-cost PurpleAir sensor can be characterized as a cell-reciprocal nephelometer. At two very different locations (Mauna Loa Observatory in Hawaii and the Table Mountain rural site in Colorado), the PurpleAir measurements are highly correlated with the submicrometer aerosol scattering coefficient measured by a research-grade integrating nephelometer. These results imply that, with care, PurpleAir data may be used to evaluate climate and air quality models.