Preprints
https://doi.org/10.5194/amt-2023-209
https://doi.org/10.5194/amt-2023-209
17 Oct 2023
 | 17 Oct 2023
Status: this preprint was under review for the journal AMT but the revision was not accepted.

Development of compact continuous measurement system for atmospheric carbonyl sulfide concentration

Kazuki Kamezaki, Sebastian O. Danielache, Shigeyuki Ishidoya, Takahisa Maeda, and Shohei Murayama

Abstract. Carbonyl sulfide (COS), the most abundant sulfur-containing gas in the atmosphere, is a source of stratospheric sulfate aerosol (SSA) and is used as a tracer for gross primary production (GPP). However, tropospheric COS sources and sinks entail great uncertainty due to the limited number COS observation sites. Thus, field measurements of COS concentrations worldwide are necessary to estimate the contribution of SSA and the global scale of GPP. Recently, MIRA Pico, a portable continuous COS concentration analyzer using mid-infrared absorption, has been released. MIRA Pico has a lower cost and is smaller than conventional laser COS analyzers. We modified and tested the MIRA Pico for atmospheric COS concentration measurements. The modified MIRA Pico exhibited ± 7.9 picomol (pmol) mol−1 (1σ) for a 15-min average, and calibration gas consumption was as low as no more than 3 L d−1. We also used the modified MIRA Pico for observations at Tsukuba, Japan. The observed COS concentrations ranged from 425 to 604 pmol mol−1, averaging a standard deviation (1σ) of (505 ± 33) pmol mol−1. The observed values agree with previous observations and exhibit clear diurnal variations. Furthermore, we installed the modified MIRA Pico in a passenger car to observe the COS concentration distribution in Tsukuba City.

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Kazuki Kamezaki, Sebastian O. Danielache, Shigeyuki Ishidoya, Takahisa Maeda, and Shohei Murayama

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2023-209', Marc von Hobe, 09 Nov 2023
    • AC2: 'Reply on RC1', Kazuki Kamezaki, 17 Jan 2024
  • RC2: 'Comment on amt-2023-209', Anonymous Referee #2, 11 Nov 2023
    • AC1: 'Reply on RC2', Kazuki Kamezaki, 17 Jan 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2023-209', Marc von Hobe, 09 Nov 2023
    • AC2: 'Reply on RC1', Kazuki Kamezaki, 17 Jan 2024
  • RC2: 'Comment on amt-2023-209', Anonymous Referee #2, 11 Nov 2023
    • AC1: 'Reply on RC2', Kazuki Kamezaki, 17 Jan 2024
Kazuki Kamezaki, Sebastian O. Danielache, Shigeyuki Ishidoya, Takahisa Maeda, and Shohei Murayama
Kazuki Kamezaki, Sebastian O. Danielache, Shigeyuki Ishidoya, Takahisa Maeda, and Shohei Murayama

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Short summary
Recently, MIRA Pico, a portable continuous carbonyl sulfide (COS) concentration analyzer using mid-infrared absorption, has been released. MIRA Pico has a lower cost and is smaller than conventional laser COS analyzers. However, actual COS atmospheric measurement results using MIRA Pico have not yet been reported. In this study, we modified and tested the MIRA Pico for atmospheric COS concentration measurements. We used the modified MIRA Pico for observations at Tsukuba, Japan.