S
S. Shertz
Researcher at National Center for Atmospheric Research
Publications - 14
Citations - 776
S. Shertz is an academic researcher from National Center for Atmospheric Research. The author has contributed to research in topics: Eddy covariance & Air quality index. The author has an hindex of 10, co-authored 14 publications receiving 698 citations.
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Journal ArticleDOI
Seasonal and interannual variations in atmospheric oxygen and implications for the global carbon cycle
Ralph F. Keeling,S. Shertz +1 more
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.
Journal ArticleDOI
Methods for measuring changes in atmospheric O2 concentration and their application in southern hemisphere air
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.
Journal ArticleDOI
On the measurement of PANs by gas chromatography and electron capture detection
Frank Flocke,Andrew J. Weinheimer,Aaron L. Swanson,James M. Roberts,Rainer Schmitt,S. Shertz +5 more
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.
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Airborne Flux Measurements of BVOCs above Californian Oak Forests: Experimental Investigation of Surface and Entrainment Fluxes, OH Densities, and Damköhler Numbers
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.
Journal ArticleDOI
Impacts of the Denver Cyclone on regional air quality and aerosol formation in the Colorado Front Range during FRAPPÉ 2014
Kennedy Vu,Justin H. Dingle,Roya Bahreini,Patrick J. Reddy,Eric C. Apel,Teresa Campos,Joshua P. DiGangi,Glenn S. Diskin,Alan Fried,Scott C. Herndon,Alan J. Hills,Rebecca S. Hornbrook,Greg Huey,Lisa Kaser,Denise D. Montzka,John B. Nowak,Sally E. Pusede,Dirk Richter,Joseph R. Roscioli,Glen W. Sachse,S. Shertz,Meghan Stell,David B. Tanner,Geoffrey S. Tyndall,James Walega,P. Weibring,Andrew J. Weinheimer,Gabriele Pfister,Frank Flocke +28 more
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.