Thermodynamic correction of particle concentrations measured by underwing
probes on fast-flying aircraft

Weigel, Ralf; Spichtinger, Peter; Mahnke, Christoph; Klingebiel, Marcus; Afchine, Armin; Petzold, Andreas; Krämer, Martina; Costa, Anja; Molleker, Sergej; Reutter, Philipp; Szakáll, Miklós; Port, Max; Grulich, Lucas; Jurkat, Tina; Minikin, Andreas; Borrmann, Stephan

doi:https://doi.org/10.5194/amt-9-5135-2016

Articles | Volume 9, issue 10

https://doi.org/10.5194/amt-9-5135-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

ML-CIRRUS – the airborne experiment on natural cirrus...

https://doi.org/10.5194/amt-9-5135-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 9, issue 10

Research article

|

20 Oct 2016

Research article |

| 20 Oct 2016

Thermodynamic correction of particle concentrations measured by underwing probes on fast-flying aircraft

Ralf Weigel, Peter Spichtinger, Christoph Mahnke, Marcus Klingebiel, Armin Afchine, Andreas Petzold, Martina Krämer, Anja Costa, Sergej Molleker, Philipp Reutter, Miklós Szakáll, Max Port, Lucas Grulich, Tina Jurkat, Andreas Minikin, and Stephan Borrmann

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Final revised paper (published on 20 Oct 2016)
Preprint (discussion started on 18 Dec 2015)

Interactive discussion

Status: closed

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

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- Supplement

RC C4764: 'Review: Thermodynamic correction of particle concentrations measured by underwing probes on fast flying aircraft', Alexei Korolev, 07 Jan 2016
- AC C5842: 'Autors' reply', Ralf Weigel, 11 Jul 2016
RC C4866: 'Thermodynamic correction of particle concentrations measured by underwing probes on fast flying aircraft - Referee Comment', Anonymous Referee #2, 13 Jan 2016
- AC C5843: 'Autors' reply', Ralf Weigel, 11 Jul 2016
RC C5117: 'Referee Comment', Anonymous Referee #3, 22 Jan 2016
- AC C5844: 'Authors' reply', Ralf Weigel, 11 Jul 2016
AC C5841: 'Author Comment - Replies to Reviews', Ralf Weigel, 11 Jul 2016

Short summary

The subject of our study concerns measurements with optical array probes (OAPs) on fast-flying aircraft such as the G550 (HALO or HIAPER). At up to Mach 0.7 the effect of air compression upstream of underwing-mounted instruments and particles' inertia need consideration for determining ambient particle concentrations. Compared to conventional practices the introduced correction procedure eliminates ambiguities and exhibits consistency over flight speeds between 50 and 250 m s⁻.