Oxalic acid in clear and cloudy atmospheres: Analysis of data from International Consortium for Atmospheric Research on transport and transformation 2004
Brechtel, Fred J.
Murphy, Shane M.
Holloway, John S.
Atlas, Elliot L.
Flagan, Richard C.
Seinfeld, John H.
MetadataShow full item record
Oxalic acid is often the leading contributor to the total dicarboxylic acid mass in ambient organic aerosol particles. During the 2004 International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) field campaign, nine inorganic ions (including SO4 2!) and five organic acid ions (including oxalate) were measured on board the Center for Interdisciplinary Remotely Piloted Aircraft Studies (CIRPAS) Twin Otter research aircraft by a particle-into-liquid sampler (PILS) during flights over Ohio and surrounding areas. Five local atmospheric conditions were studied: (1) cloud-free air, (2) power plant plume in cloud-free air with precipitation from scattered clouds overhead, (3) power plant plume in cloud-free air, (4) power plant plume in cloud, and (5) clouds uninfluenced by local pollution sources. The aircraft sampled from two inlets: a counterflow virtual impactor (CVI) to isolate droplet residuals in clouds and a second inlet for sampling total aerosol. A strong correlation was observed between oxalate and SO4 2! when sampling through both inlets in clouds. Predictions from a chemical cloud parcel model considering the aqueous-phase production of dicarboxylic acids and SO4 2! show good agreement for the relative magnitude of SO4 2! and oxalate growth for two scenarios: power plant plume in clouds and clouds uninfluenced by local pollution sources. The relative contributions of the two aqueous-phase routes responsible for oxalic acid formation were examined; the oxidation of glyoxylic acid was predicted to dominate over the decay of longer-chain dicarboxylic acids. Clear evidence is presented for aqueous-phase oxalic acid production as the primary mechanism for oxalic acid formation in ambient aerosols.
Journal of Geophysical Research, Vol. 111, D23S45The article of record as published may be located at http://dx.doi.org/10.1029/2005D006880.
Showing items related by title, author, creator and subject.
Aerosol-cloud drop concentration closure for clouds sampled during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign Fountoukis, Christos; Nenes, Athanasios; Meskhidze, Nicholas; Bahreini, Roya; Conant, William C.; Jonsson, Haflidi; Murphy, Shane; Sorooshian, Armin; Varutbangkul, Varuntida; Brechtel, Fred; Flagan, Richard C.; Seinfeld, John H. (2007);This study analyzes 27 cumuliform and stratiform clouds sampled aboard the CIRPAS Twin Otter during the 2004 International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) experiment. The data ...
Observations of the temporal variability in aerosol properties and their relationships to meteorology in the summer monsoonal South China Sea/East Sea: the scale-dependent role of monsoonal flows, the Madden-Julian Oscillation, tropical cyclones, squall lines and cold pools Reid, J.S.; Lagrosas, N.D.; Jonsson, H.H.; Reid, E.A.; Sessions, W.R.; Simpas, J.B.; Uy, S.N.; Boyd, T.J.; Atwood, S.A.; Blake, D.R.; Campbell, J.R.; Cliff, S.S.; Holben, B.N.; Holz, R.E.; Hyer, E.J.; Lynch, P.; Meinardi, S.; Posselt, D.J.; Richardson, K.A.; Salinas, S.V.; Smirnov, A.; Wang, Q.; Yu, L.; Zhang, J. (2015);In a joint NRL/Manila Observatory mission, as part of the Seven SouthEast Asian Studies program (7- SEAS), a 2-week, late September 2011 research cruise in the northern Palawan archipelago was undertaken to observe the ...
Norgren, M.S.; Small, J.D.; Jonsson, H.H.; Chuang, P.Y. (2016);Vertical transport associated with cumulus clouds is important to the redistribution of gases, particles, and energy, with subsequent consequences for many aspects of the climate system. Previous studies have suggested ...