Measurements of CH3O2NO2 in the upper troposphere

Nault, B. A.; Garland, C.; Pusede, S. E.; Wooldridge, P. J.; Ullmann, K.; Hall, S. R.; Cohen, R. C.

doi:10.5194/amt-8-987-2015

Articles | Volume 8, issue 2

https://doi.org/10.5194/amt-8-987-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/amt-8-987-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 8, issue 2

Research article

|

27 Feb 2015

Research article |

| 27 Feb 2015

Measurements of CH₃O₂NO₂ in the upper troposphere

B. A. Nault, C. Garland, S. E. Pusede, P. J. Wooldridge, K. Ullmann, S. R. Hall, and R. C. Cohen

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Latest update: 25 Nov 2025

Short summary

We report the first atmospheric measurement of methyl peroxy nitrate (CH3O2NO2) and describe an experimental strategy to obtain NO2 observations free of methyl peroxy nitrate (CH3O2NO2). The accuracy of the CH3O2NO2 measurements are (+/- 40%) with a LOD of 15 pptv/min. We observe that CH3O2NO2 is ubiquitous in the upper troposphere with median mixing ratios of 100 to 200 pptv, and its composition to the total NOy budget is comparable to HNO3.