Articles | Volume 21, issue 9
Atmos. Chem. Phys., 21, 7053–7082, 2021
https://doi.org/10.5194/acp-21-7053-2021
Atmos. Chem. Phys., 21, 7053–7082, 2021
https://doi.org/10.5194/acp-21-7053-2021

Research article 10 May 2021

Research article | 10 May 2021

Assessing and improving cloud-height-based parameterisations of global lightning flash rate, and their impact on lightning-produced NOx and tropospheric composition in a chemistry–climate model

Ashok K. Luhar et al.

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Latest update: 21 Oct 2021
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Short summary
Lightning-generated nitrogen oxides (LNOx) greatly influence tropospheric photochemistry. The most common parameterisation of lightning flash rate used to calculate LNOx in global composition models underestimates measurements over the ocean by a factor of 20–25. We formulate and validate an alternative parameterisation to remedy this problem. The new scheme causes an increase in the ozone burden by 8.5 % and the hydroxyl radical by 13 %, and these have implications for climate and air quality.
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