S. Shertz

TL;DR: The authors measured changes in atmospheric molecular oxygen using a new interferometric technique and showed that the O2 content of air varies seasonally in both the Northern and Southern Hemispheres and is decreasing from year to year.

TL;DR: In this article, a 9-year survey of six reference gases showed no systematic long-term trends in relative O2 concentrations to the level of 5 per meg, with systematic errors associated with collecting samples and with storing them for 1 year reduced to a level of 3 per meg or smaller.

TL;DR: A fast, automated, gas chromatographic system for the airborne measurement of PAN and a series of its homologues is described and its performance is evaluated in this paper, where the results from this work should help investigators who are employing the widely used GC/ECD method for the measurement of peroxyacyl nitrates to evaluate peaks of PAN homology that cannot be calibrated for using the reported response factors.

TL;DR: In this article, the authors demonstrate the feasibility of airborne eddy covariance measurements of reactive biogenic volatile organic compounds; the effect of chemistry on the vertical transport of reactive species, such as isoprene; and the applicability of wavelet analysis to estimate regional fluxes of BVO compounds.

TL;DR: In this article, the impacts of the Denver Cyclone on regional air quality in the greater Denver area were investigated in the presence and absence of the surface mesoscale circulation in three distinct study regions of the Front Range: In-Flow, Northern Front Range and the Denver metropolitan area.