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The Sensitivity of U.S. Surface Ozone Formation to NOx, and VOCs as Viewed from SpaceWe investigated variations in the sensitivity of surface ozone formation in summer to precursor species concentrations of volatile organic compounds (VOCs) and nitrogen oxides (NO(x)) as inferred from the ratio of tropospheric columns of formaldehyde and nitrogen dioxide from the Aura Ozone Monitoring Instrument (OMI). The data indicate that ozone formation became: 1. more sensitive to NO(x) over most of the U.S, from 2005 to 2007 because of substantial decreases in NO(x) emissions primarily from stationary sources, and 2. more sensitive to NO(x) with increasing temperature, in part because emissions of highly reactive, biogenic isoprene increase with temperature, thus increasing the total VOC reactivity. Based on our interpretation of the data, current strategies implemented to reduce unhealthy levels of surface ozone should focus more on reducing NO(x) emissions, except in some downtown areas which have historically benefited from reductions in VOC emissions.
Document ID
20090027650
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Duncan, Bryan N. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Yoshida, Yasuko (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sillman, Sanford (Michigan Univ. Ann Arbor, MI, United States)
Retscher, Christian (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Pickering, Kenneth E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Martin, Randall V. (Dalhousie Univ. Halifax, Nova Scotia, Canada)
Celarier, Edward A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2009
Subject Category
Space Sciences (General)
Distribution Limits
Public
Copyright
Public Use Permitted.

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