Correction to Source Signature of Volatile Organic Compounds from

Addition/Correction pubs.acs.org/est

Correction to Source Signature of Volatile Organic Compounds from Oil and Natural Gas Operations in Northeastern Colorado J. B. Gilman,* B. M. Lerner, W. C. Kuster, and J. A. de Gouw Environ. Sci. Technol. 2013, 47, 1297−1305; DOI: 10.1021/es304119a

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ince the publication of this paper, it has come to our attention that an important reference was overlooked. The results of concurrent measurements by the group of Barkley Sive were used in an analysis that reached similar conclusions as ours. This analysis was presented as a poster during the 2011 Fall Meeting of the American Geophysical Union. We would like to add this reference to our paper. The closing paragraph of the paper now becomes “The results of this analysis indicate that VOC emissions from O&NG production in northeastern Colorado are a significant source of O3-precursors in this region. A similar conclusion was reached from the analysis of canister samples that were collected at different levels of the BAO tower concurrently with the measurements reported here.39 The contribution from O&NG operations is expected to decrease somewhat during the summertime “O3 season” as the relative importance of three biogenic VOCs may increase. We have recently conducted summertime measurements at BAO to investigate the relative role of biogenic VOCs and investigate the products formed during active photochemistry in order to identify the important VOC precursors, which will be detailed in a forthcoming analysis.”

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REFERENCES (39)Russo, R. S.; Sive, B. C.; Zhou, Y. ; Swarthout, R.; Hart, A. Characterization of Nonmethane Hydrocarbons During the NACHTT Campaign at the Boulder Atmospheric Observatory, Abstract A13F-0423; Presented at 2011 Fall Meeting, AGU, San Francisco, CA, December 5−9, 2011.

Published: August 23, 2013 © 2013 American Chemical Society

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dx.doi.org/10.1021/es4036978 | Environ. Sci. Technol. 2013, 47, 10094−10094