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 Though accurate at the time of publication, it is no longer being updated.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.


Atmospheric oxidation in the presence of clouds during the Deep Convective...

Brune, W. H., X. Ren, L. Zhang, J. Mao, D. O. Miller, B. E. Anderson, D. R. Blake, R. C. Cohen, G. S. Diskin, S. R. Hall, T. F. Hanisco, L. G. Huey, B. Nault, J. Peischl, I. B. Pollack, T. B. Ryerson, T. Shingler, A. Sorooshian, K. Ullmann, A. Wisthaler, and P. J. Wooldridge (2018), Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study, Atmos. Chem. Phys., 18, 14493-14510, doi:10.5194/acp-18-14493-2018.

Deep convective clouds are critically important to the distribution of atmospheric constituents throughout the troposphere but are difficult environments to study. The Deep Convective Clouds and Chemistry (DC3) study in 2012 provided the environment, platforms, and instrumentation to test oxidation chemistry around deep convective clouds and their impacts downwind. Measurements on the NASA DC-8 aircraft included those of the radicals hydroxyl (OH) and hydroperoxyl (HO2 ), OH reactivity, and more than 100 other chemical species and atmospheric properties. OH, HO2 , and OH reactivity were compared to photochemical models, some with and some without simplified heterogeneous chemistry, to test the understanding of atmospheric oxidation as encoded in the model. In general, the agreement between the observed and modeled OH, HO2 , and OH reactivity was within the combined uncertainties for the model without heterogeneous chemistry and the model including heterogeneous chemistry with small OH and HO2 uptake consistent with laboratory studies. This agreement is generally independent of the altitude, ozone photolysis rate, nitric oxide and

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