A single-beam photothermal interferometer for in situ measurements of aerosol light absorption

Visser, Bradley; Röhrbein, Jannis; Steigmeier, Peter; Drinovec, Luka; Močnik, Griša; Weingartner, Ernest

doi:https://doi.org/10.5194/amt-13-7097-2020

Articles | Volume 13, issue 12

https://doi.org/10.5194/amt-13-7097-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-13-7097-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 13, issue 12

Research article

|

23 Dec 2020

Research article |

| 23 Dec 2020

A single-beam photothermal interferometer for in situ measurements of aerosol light absorption

Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, and Ernest Weingartner

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Final revised paper (published on 23 Dec 2020)
Supplement to the final revised paper
Preprint (discussion started on 03 Jul 2020)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review of Visser et al., AMT 2020', Anonymous Referee #1, 31 Jul 2020
- AC1: 'Author's reply to Anonymous Reviewer #1', Bradley Visser, 26 Sep 2020
RC2: 'Comments', Anonymous Referee #2, 04 Aug 2020
- AC2: 'Author's reply to Anonymous Reviewer #2', Bradley Visser, 26 Sep 2020
RC3: 'single-beam photothermal interferometer', Anonymous Referee #3, 10 Aug 2020
- AC3: 'Author's reply to Anonymous Reviewer #3', Bradley Visser, 26 Sep 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Bradley Visser on behalf of the Authors (24 Oct 2020) Author's response Manuscript

ED: Publish subject to technical corrections (26 Oct 2020) by Charles Brock

AR by Bradley Visser on behalf of the Authors (03 Nov 2020) Manuscript

Short summary

Here we report on the development of a novel single-beam photothermal interferometer and its use in the measurement of aerosol light absorption. We demonstrate how light-absorbing gases can be used to calibrate the instrument and how this absorption is automatically subtracted during normal operation. The performance of the instrument is compared to a standard filter-based instrument using a black carbon test aerosol. The 60 s detection limit is found to be less than 10 Mm^-1.