Journal article

Daytime HONO, NO2 and aerosol distributions from MAX-DOAS observations in Melbourne

Robert G Ryan, Steve Rhodes, Matthew Tully, Stephen Wilson, Nicholas Jones, Udo Friess, Robyn Schofield



Toxic nitrogen oxides produced by high temperature combustion are prevalent in urban environments, contributing to a significant health burden. Nitrogen oxides such as NO2 and HONO in pollution are important for hydroxyl radical (OH) production and overall oxidative capacity in urban environments; however, current mechanisms cannot explain high daytime levels of HONO observed in many urban and rural locations around the world. Here we present HONO, NO2 and aerosol extinction vertical distributions retrieved from multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements in suburban Melbourne, which are the first MAX-DOAS results from the Australian continent. Using the o..

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University of Melbourne Researchers


Awarded by Australian Research Council's Centre of Excellence for Climate System Science

Awarded by Australian Research Council

Funding Acknowledgements

RGR wishes to acknowledge helpful discussions with Peter Rayner on atmospheric inverse methods and Johannes Lampel on DOAS fitting methods, as well as Paul Torre and the Victorian Environment Protection Agency for making air quality data available. The authors acknowledge Thomas Danckeart, Caroline Fayt and Michel van Roozendael, authors of the QDOAS software used in DOAS analysis in this work. RS and RGR acknowledge support from the Australian Research Council's Centre of Excellence for Climate System Science (CE110001028) and the Australian Research Council's Discovery project: Tackling Atmospheric Chemistry Grand Challenges in the Southern Hemisphere (DP160101598).