A Caltech Library Service

H₂O₂ and CH₃OOH (MHP) in the Remote Atmosphere: 1. Global Distribution and Regional Influences

Allen, Hannah M. and Crounse, John D. and Kim, Michelle J. and Teng, Alexander P. and Ray, Eric A. and McKain, Kathryn and Sweeney, Colm and Wennberg, Paul O. (2022) H₂O₂ and CH₃OOH (MHP) in the Remote Atmosphere: 1. Global Distribution and Regional Influences. Journal of Geophysical Research. Atmospheres, 127 (6). Art. No. e2021JD035701. ISSN 2169-897X. doi:10.1029/2021JD035701.

[img] PDF - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


Atmospheric hydroperoxides are a significant component of the atmosphere's oxidizing capacity. Two of the most abundant hydroperoxides, hydrogen peroxide (H₂O₂) and methyl hydroperoxide (MHP, CH₃OOH), were measured in the remote atmosphere using chemical ionization mass spectrometry aboard the NASA DC-8 aircraft during the Atmospheric Tomography Mission. These measurements present a seasonal investigation into the global distribution of these two hydroperoxides, with near pole-to-pole coverage across the Pacific and Atlantic Ocean basins and from the marine boundary layer to the upper troposphere and lower stratosphere. H₂O₂ mixing ratios are highest between 2 and 4 km altitude in the equatorial region of the Atlantic Ocean basin, where they reach global maximums of 3.6–6.5 ppbv depending on season. MHP mixing ratios reach global maximums of 4.3–8.6 ppbv and are highest between 1 and 3 km altitude, but peak in different regions depending on season. A major factor contributing to the global H₂O₂ distribution is the influence of biomass burning emissions in the Atlantic Ocean basin, encountered in all four seasons, where the highest H₂O₂ mixing ratios were found to correlate strongly with increased mixing ratios of the biomass burning tracers hydrogen cyanide (HCN) and carbon monoxide (CO). This biomass burning enhanced H₂O₂ by a factor of 1.3–2.2, on average, in the Atlantic compared with the Pacific Ocean basin.

Item Type:Article
Related URLs:
URLURL TypeDescription
Allen, Hannah M.0000-0002-4218-5133
Crounse, John D.0000-0001-5443-729X
Kim, Michelle J.0000-0002-4922-4334
Teng, Alexander P.0000-0002-6434-0501
Ray, Eric A.0000-0001-8727-9849
McKain, Kathryn0000-0002-8323-5758
Sweeney, Colm0000-0001-9568-0050
Wennberg, Paul O.0000-0002-6126-3854
Alternate Title:H2O2 and CH3OOH (MHP) in the Remote Atmosphere: 1. Global Distribution and Regional Influences
Additional Information:© 2022. American Geophysical Union. Issue Online: 18 March 2022. Version of Record online: 18 March 2022. Accepted manuscript online: 02 March 2022. Manuscript accepted: 28 January 2022. Manuscript revised: 23 December 2021. Manuscript received: 13 August 2021. Funding for this work was provided by NASA Grant No. NNX15AG61A. Additional support for H. M. A. was provided by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1144469 and additional support for M. J. K. was provided by the National Science Foundation Grant No. 1524860. The authors would like to thank the organizers of the ATom Mission, particularly S. C. Wofsy and T. B. Ryerson, for providing the opportunity to gather these data. We would also like to thank E. Czech, D. Jordan, and the people at ESPO, as well as the pilots and crew of the DC-8 for the infrastructural support that made these measurements possible. Data Availability Statement. The data presented in this paper are available at
Funding AgencyGrant Number
NSF Graduate Research FellowshipDGE-1144469
NSF Atmospheric and Geospace Sciences FellowshipAGS-1524860
Issue or Number:6
Record Number:CaltechAUTHORS:20220414-413126000
Persistent URL:
Official Citation:Allen, H. M., Crounse, J. D., Kim, M. J., Teng, A. P., Ray, E. A., McKain, K., et al. (2022). H2O2 and CH3OOH (MHP) in the remote atmosphere: 1. Global distribution and regional influences. Journal of Geophysical Research: Atmospheres, 127, e2021JD035701.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114336
Deposited By: George Porter
Deposited On:15 Apr 2022 17:01
Last Modified:15 Apr 2022 17:01

Repository Staff Only: item control page