MLS measurements of stratospheric hydrogen cyanide during  the 2015–2016 El Niño event

Pumphrey, Hugh C.; Glatthor, Norbert; Bernath, Peter F.; Boone, Christopher D.; Hannigan, James W.; Ortega, Ivan; Livesey, Nathaniel J.; Read, William G.

doi:https://doi.org/10.5194/acp-18-691-2018

Articles | Volume 18, issue 2

https://doi.org/10.5194/acp-18-691-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-18-691-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 2

Research article

|

19 Jan 2018

Research article |

| 19 Jan 2018

MLS measurements of stratospheric hydrogen cyanide during the 2015–2016 El Niño event

Hugh C. Pumphrey, Norbert Glatthor, Peter F. Bernath, Christopher D. Boone, James W. Hannigan, Ivan Ortega, Nathaniel J. Livesey, and William G. Read

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Final revised paper (published on 19 Jan 2018)
Preprint (discussion started on 05 Jul 2017)

Interactive discussion

Status: closed

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

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AC1: 'Corrected text re FTIR instrument', Hugh C. Pumphrey, 13 Jul 2017
RC1: 'Comments on “MLS measurements of stratospheric hydrogen cyanide during the 2015-16 El Niño event." This paper “MLS measurements of stratospheric hydrogen cyanide during the 2015-16 El Niño event” by Pumphery et al. shows elevated levels of HCN in ', Anonymous Referee #1, 28 Jul 2017
- AC2: 'Reply to RC1', Hugh C. Pumphrey, 16 Aug 2017
RC2: 'Review on “MLS measurements of stratospheric hydrogen cyanide during the 2015–16 El Niño event” by Hugh C. Pumphrey et al.', Mengchu Tao, 25 Aug 2017
- AC3: 'Reply to RC2', Hugh C. Pumphrey, 07 Sep 2017

Peer-review completion

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

AR by Hugh C. Pumphrey on behalf of the Authors (25 Oct 2017) Author's response Manuscript

ED: Publish subject to technical corrections (10 Nov 2017) by Rolf Müller

AR by Hugh C. Pumphrey on behalf of the Authors (14 Nov 2017) Manuscript

Short summary

The Microwave Limb Sounder (MLS) is a satellite instrument that has been measuring the amount of various gases in the atmosphere since 2004. In late 2015 and 2016 it observed unusual amounts of hydrogen cyanide (HCN), a gas produced when vegetation is burned. We compare the MLS observations to similar observations from other instruments. The excess HCN is shown to come from fires in Indonesia. There are more fires than usual in 2015–16 due to a drought caused by an El Niño event.