EGU2020-12042
https://doi.org/10.5194/egusphere-egu2020-12042
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Mapping the Oxidizing Capacity of the Global Remote Troposphere

Julie Nicely1,2, Glenn Wolfe2,3, Jason St. Clair2,3, Thomas Hanisco2, Jin Liao2,4, Luke Oman2, Gonzalo González Abad5, and the ATom Science Team*
Julie Nicely et al.
  • 1Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA.
  • 2NASA Goddard Space Flight Center, Atmospheric Chemistry and Dynamics Laboratory, Greenbelt, MD, USA.
  • 3Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD, USA.
  • 4Universities Space Research Association, Columbia, MD, USA.
  • 5Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA.
  • *A full list of authors appears at the end of the abstract

Observations from the NASA Atmospheric Tomography Mission (ATom) have elucidated a strong relationship between the production of hydroxyl radical (OH), the primary oxidant of the troposphere, and formaldehyde (HCHO), a major product of the oxidation of methane and other hydrocarbons.  We present a proxy for global over-ocean OH based on this principle, using remote observations of HCHO from the Ozone Monitoring Instrument (OMI).  Analysis of summer and wintertime remote OH from this proxy suggest a near-constant mean concentration of 1.03 ± 0.25 × 106 cm−3 and a Northern Hemisphere to Southern Hemisphere over-ocean OH ratio of 0.89 ± 0.06 averaged over both seasons (1s uncertainties).  We also share ongoing efforts to expand on this approach by refining the scaling factors that relate OH production to HCHO as a function of CO, NOx, and VOCs, with the goal of extending the proxy over land as well as across the OMI record.

ATom Science Team:

Hannah M. Allen, William B. Brune, T. Paul Bui, Cecilia Chang, John D. Crounse, Jonathan Dean-Day, Glenn S. Diskin, Samuel R. Hall, Michelle J. Kim, Kathryn McKain, David Miller, Jeff Peischl, Thomas B. Ryerson, Colm Sweeney, Alexander Thames, Chelsea R. Thompson, Kirk Ullmann, Paul O. Wennberg

How to cite: Nicely, J., Wolfe, G., St. Clair, J., Hanisco, T., Liao, J., Oman, L., and González Abad, G. and the ATom Science Team: Mapping the Oxidizing Capacity of the Global Remote Troposphere, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12042, https://doi.org/10.5194/egusphere-egu2020-12042, 2020

ATom Science Team:

Hannah M. Allen, William B. Brune, T. Paul Bui, Cecilia Chang, John D. Crounse, Jonathan Dean-Day, Glenn S. Diskin, Samuel R. Hall, Michelle J. Kim, Kathryn McKain, David Miller, Jeff Peischl, Thomas B. Ryerson, Colm Sweeney, Alexander Thames, Chelsea R. Thompson, Kirk Ullmann, Paul O. Wennberg

How to cite: Nicely, J., Wolfe, G., St. Clair, J., Hanisco, T., Liao, J., Oman, L., and González Abad, G. and the ATom Science Team: Mapping the Oxidizing Capacity of the Global Remote Troposphere, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12042, https://doi.org/10.5194/egusphere-egu2020-12042, 2020

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Display material version 1 – uploaded on 01 May 2020
  • CC1: Comment on EGU2020-12042, Nick Craine, 06 May 2020

    Hello Dr. Nicely,

    Just had a look through your deck. We should chat when post conference. I thnk we have a solution that could be a compliment your efforts with the DC-8.

    Very Best, Nick