James Flynn

TL;DR: It is found that ozone production occurs at lower NOx and much larger VOC concentrations than does its summertime urban counterpart, leading to carbonyl (oxygenated VOCs with a C = O moiety) photolysis as a dominant oxidant source.

TL;DR: In this paper, five organic aerosols (OA) components are identified using positive matrix factorization including hydrocarbon-like OA (HOA) and two types of oxygenated OA(OOA) components, and the Pasadena OA elemental composition when plotted as H:C versus O:C follows a line less steep than that observed for Riverside, CA.

TL;DR: In this article, the authors compared four field studies: TEXAQS2000 (Houston, 2000), NYC2001 (New York City, 2001), MCMA2003 (Mexico City, 2003), and TRAMP2006 (Houston and Mexico City, 2006) and found that Houston is much more like Mexico City than New York City in terms of photochemical activity.

TL;DR: Data show that vertical gradients of radical precursors should be taken into account in radical budgets, particularly with respect to HONO, as well as a comprehensive radical budget at ground level.

TL;DR: In this article, the authors extend current understanding of the weekend ozone effect in the SoCAB by identifying its major causes and quantifying their relative importance from the available CalNex data.