Articles | Volume 14, issue 7
https://doi.org/10.5194/acp-14-3373-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-14-3373-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
04 Apr 2014
Research article |
| 04 Apr 2014
On the temperature dependence of organic reactivity, nitrogen oxides, ozone production, and the impact of emission controls in San Joaquin Valley, California
S. E. Pusede
Department of Chemistry, University of California Berkeley, Berkeley, California, USA
D. R. Gentner
Department of Civil and Environmental Engineering, University of California Berkeley, Berkeley, California, USA
P. J. Wooldridge
Department of Chemistry, University of California Berkeley, Berkeley, California, USA
E. C. Browne
Department of Chemistry, University of California Berkeley, Berkeley, California, USA
now at: Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
A. W. Rollins
Department of Chemistry, University of California Berkeley, Berkeley, California, USA
now at: Earth System Research Laboratory, National Oceanic and Atmospheric Administration and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, USA
K.-E. Min
Department of Earth and Planetary Sciences, University of California Berkeley, Berkeley, California, USA
now at: Earth System Research Laboratory, National Oceanic and Atmospheric Administration and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, USA
A. R. Russell
Department of Chemistry, University of California Berkeley, Berkeley, California, USA
now at: Sonoma Technology, Petaluma, California, USA
J. Thomas
Department of Meteorology, Pennsylvania State University, University Park, Pennsylvania, USA
L. Zhang
Department of Meteorology, Pennsylvania State University, University Park, Pennsylvania, USA
W. H. Brune
Department of Meteorology, Pennsylvania State University, University Park, Pennsylvania, USA
S. B. Henry
Department of Chemistry, University of Wisconsin Madison, Madison, Wisconsin, USA
J. P. DiGangi
Department of Chemistry, University of Wisconsin Madison, Madison, Wisconsin, USA
now at: Department of Civil and Environmental Engineering, Princeton University, Princeton, New Jersey, USA
F. N. Keutsch
Department of Chemistry, University of Wisconsin Madison, Madison, Wisconsin, USA
S. A. Harrold
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
J. A. Thornton
Department of Atmospheric Sciences, University of Washington, Seattle, Washington, USA
M. R. Beaver
Divisions of Engineering and Applied Science and Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA
now at: National Exposure Research Laboratory, Environmental Protection Agency, Research Triangle Park, North Carolina, USA
J. M. St. Clair
Divisions of Engineering and Applied Science and Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA
P. O. Wennberg
Divisions of Engineering and Applied Science and Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA
J. Sanders
Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida, USA
Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida, USA
now at: Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, Maryland, USA
T. C. VandenBoer
Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
now at: Department of Chemistry and Department of Earth Science, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
M. Z. Markovic
Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
now at: Earth System Research Laboratory, National Oceanic and Atmospheric Administration and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, USA
Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, California, USA
R. Weber
Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, California, USA
A. H. Goldstein
Department of Civil and Environmental Engineering, University of California Berkeley, Berkeley, California, USA
Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, California, USA
R. C. Cohen
Department of Chemistry, University of California Berkeley, Berkeley, California, USA
Department of Earth and Planetary Sciences, University of California Berkeley, Berkeley, California, USA
Abstract. The San Joaquin Valley (SJV) experiences some of the worst ozone air quality in the US, frequently exceeding the California 8 h standard of 70.4 ppb. To improve our understanding of trends in the number of ozone violations in the SJV, we analyze observed relationships between organic reactivity, nitrogen oxides (NOx), and daily maximum temperature in the southern SJV using measurements made as part of California at the Nexus of Air Quality and Climate Change in 2010 (CalNex-SJV). We find the daytime speciated organic reactivity with respect to OH during CalNex-SJV has a temperature-independent portion with molecules typically associated with motor vehicles being the major component. At high temperatures, characteristic of days with high ozone, the largest portion of the total organic reactivity increases exponentially with temperature and is dominated by small, oxygenated organics and molecules that are unidentified. We use this simple temperature classification to consider changes in organic emissions over the last and next decade. With the CalNex-SJV observations as constraints, we examine the sensitivity of ozone production (PO3) to future NOx and organic reactivity controls. We find that PO3 is NOx-limited at all temperatures on weekends and on weekdays when daily maximum temperatures are greater than 29 °C. As a consequence, NOx reductions are the most effective control option for reducing the frequency of future ozone violations in the southern SJV.
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How to cite. Pusede, S. E., Gentner, D. R., Wooldridge, P. J., Browne, E. C., Rollins, A. W., Min, K.-E., Russell, A. R., Thomas, J., Zhang, L., Brune, W. H., Henry, S. B., DiGangi, J. P., Keutsch, F. N., Harrold, S. A., Thornton, J. A., Beaver, M. R., St. Clair, J. M., Wennberg, P. O., Sanders, J., Ren, X., VandenBoer, T. C., Markovic, M. Z., Guha, A., Weber, R., Goldstein, A. H., and Cohen, R. C.: On the temperature dependence of organic reactivity, nitrogen oxides, ozone production, and the impact of emission controls in San Joaquin Valley, California, Atmos. Chem. Phys., 14, 3373–3395, https://doi.org/10.5194/acp-14-3373-2014, 2014.
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