The Ozone Weekend Effect in California

This page last reviewed May 5, 2011

ARB Technical Support Document


The Ozone Weekend Effect in California

June 30, 2003

TABLE OF CONTENTS

 Front End (PDF-325k)

    Disclaimer

    Acknowledgments

    Glossary of Terms

Table of Contents (PDF-58k)

1. Characterization of the Ozone Weekend Effect in California

1.1 Trends in Ambient Ozone Concentrations in the South Coast Air Basin (PDF-215k)

1.2 The Weekend Ozone Effect during Ozone-Conducive Days in the South Coast Air Basin (PDF-232k)

1.3 Analysis of the Ozone Weekend Effect in the San Joaquin Valley Air Basin, Including Selected Summaries for Other Air Basins (PDF-243k)

1.4 The Weekday-Weekend Behavior of Ambient Ozone Concentrations in California (PDF-183k) (PDF-375k)



2. Analysis of Variations in Ozone and Ozone Precursors

2.1 Diurnal Patterns of Ozone & Precursors in the South Coast Air Basin (PDF-108k) (PDF-510k)

2.2 Ozone Precursor Trends (PDF-73k) (PDF-393k)

2.3 Analysis of VOC to NOX Ratios in the South Coast Air Basin (PDF-167k)

2.4 WD/WE Differences in Hydrocarbon Reactivity (PDF-57k)

2.5 Ozone Carryover and Day-of-Week Phenomena Based on Data from Ozonesondes, Aircraft, and Ozone Lidar during SCOS97 (PDF-80k) (PDF-1067k)

2.6 Day-of-Week Differences in Ozone Quenching near the Ground (PDF-162k)


3. Analysis of Variations in Particulate Matter

3.1 Day-of-Week Patterns of Particulate Matter and its Species at Selected Sites (PDF-439k) (PDF-311k)

4. Analysis of Variations in Toxic Air Contaminants

4.1 Day-of-Week Patterns for Six High-Risk Toxic Air Contaminants (PDF-141k)

5. Analysis of Variations in Vehicular Activity Patterns

5.1 Day-of-Week Patterns of Heavy-Duty and Non-Heavy-Duty Vehicle Activity at Weigh-in-Motion (WIM) Stations Relevant to the South Coast Air Basin During the Summer of 1997 (PDF-724k)

5.2 Analysis of Hourly Freeway Activity by Day-of-Week in the South Coast Air Basin During the Summer of 1997 (PDF-641k)

5.3 Comparisons Between Vehicular Activity and Ambient Air Quality Data by Day-of-Week (PDF-687k)

6. Photochemical Simulation Models and the Ozone Weekend Effect

6.1 Technical Issues for Performance Analyses When Using Photochemical Simulation Models to Study the Causes of the Ozone Weekend Effect (PDF-202k)

7. Recommendations

7.1 Recommendations for Further Research (PDF-113k)

8. Overview of Current Non-ARB Research Efforts

8.1 Weekend/Weekday Ozone Observations in the South Coast Air Basin (DRI/STI) (PDF-59k)

8.2 Data Analysis for a Better Understanding of the Weekday/Weekend O3 and PM Differences (AER) (PDF-51k)

8.3 Proximate Modeling of Weekday versus Weekend Ozone (ENVIRON ) (PDF-58k)

8.4 Data Analysis Complementing Proximate Modeling of Weekday/Weekend Ozone Differences in Southern California (ENVAIR) (PDF-47k)

8.5 Collection of Micro-Scale Emissions Activity Data in the South Coast Air Basin (STI) (PDF-62k)

8.6 Collection and Analysis of Weekend/Weekday Activity Data in the South Coast Air Basin (STI) (PDF-61k)

8.7 Miscellaneous Data Collection Efforts in the South Coast Air Basin Supporting Weekday/Weekend Activity (PDF-60k)

8.8 Analysis of Weekday/Weekend Differences in Ambient Particulate Nitrate Concentrations and Formation in Southern California (PDF-48k)

9. Relevant Literature

9.1 Compendium of Weekend Effect Literature (PDF-101k)

Appendices

A - Air Improvement Resource, Inc. comments (PDF-229k)

B - Envair comments (PDF-236k)

C - Response of CARB Staff to Major Public Comments (PDF-347k)

D - University of California Peer Review Comments with Staff Responses (PDF-527k)

 

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