Articles | Volume 18, issue 2
Atmos. Chem. Phys., 18, 691–703, 2018
https://doi.org/10.5194/acp-18-691-2018
Atmos. Chem. Phys., 18, 691–703, 2018
https://doi.org/10.5194/acp-18-691-2018

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 et al.

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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.
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