Warning message

Member access has been temporarily disabled. Please try again later.
The GLOPAC website is undergoing a major upgrade that began Friday, October 11th at 5:00 PM PDT. The new upgraded site will be available no later than Monday, October 21st. Until that time, the current site will be visible but logins are disabled.

 

Disclaimer: This material is being kept online for historical purposes. Though accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers. Visit https://espo.nasa.gov for information about our current projects.

 

Field observational constraints on the controllers in glyoxal (CHOCHO) reactive...

Kim, D., C. Cho, S. Jeong, S. Lee, B. Nault, Campuzano Jost, D. A. Day, J. C. Schroder, J. Jimenez-Palacios, R. Volkamer, D. R. Blake, A. Wisthaler, A. Fried, J. P. DiGangi, G. S. Diskin, S. E. Pusede, S. R. Hall, K. Ullmann, L. G. Huey, D. J. Tanner, J. Dibb, C. J. Knote, and K. Min (2022), Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol, Atmos. Chem. Phys., doi:10.5194/acp-22-805-2022.
Abstract: 

Glyoxal (CHOCHO), the simplest dicarbonyl in the troposphere, is a potential precursor for secondary organic aerosol (SOA) and brown carbon (BrC) affecting air quality and climate. The airborne measurement of CHOCHO concentrations during the KORUS-AQ (KORea–US Air Quality study) campaign in 2016 enables detailed quantification of loss mechanisms pertaining to SOA formation in the real atmosphere. The production of this molecule was mainly from oxidation of aromatics (59 %) initiated by hydroxyl radical (OH). CHOCHO loss to aerosol was found to be the most important removal path (69 %) and contributed to roughly ∼ 20 % (3.7 µg sm−3 ppmv−1 h−1 , normalized with excess CO) of SOA growth in the first 6 h in Seoul Metropolitan Area. A reactive uptake coefficient (γ ) of ∼ 0.008 best represents the loss of CHOCHO by surface uptake during the campaign. To our knowledge, we show the first field observation of aerosol surface-area-dependent

PDF of Publication: 
Download from publisher's website.
Research Program: 
Tropospheric Composition Program (TCP)
Mission: 
KORUS-AQ