CRC Report No. A-34 - Coordinating Research Council

April 2005
TABLE OF CONTENTS
Page
EXECUTIVE SUMMARY .................................................................................................... ES-1
1.0 INTRODUCTION.......................................................................................................... 1-1
1.1 Study Background..................................................................................................... 1-1
1.2 Study Objectives ....................................................................................................... 1-1
1.3 VOC Receptor Modeling Background...................................................................... 1-2
1.4 Overview of Project Approach ................................................................................. 1-3
2.0 PHOTOCHEMICAL MODELING METHODOLOGY........................................... 2-1
2.1 Models, Domain, Episode and Receptors................................................................. 2-1
2.2 Emission Inventory Data........................................................................................... 2-5
2.3 Measurement Noise in Ambient Samples............................................................... 2-10
2.4 Experiments for Rounds 1 and 2............................................................................. 2-14
2.5 Supporting Information for Round 2 ...................................................................... 2-20
2.6 Experiments for Round 3........................................................................................ 2-27
2.7 Information Provided for Round 4.......................................................................... 2-27
3.0 RECEPTOR MODELING METHODOLOGY.......................................................... 3-1
3.1 Fundamentals ............................................................................................................ 3-1
3.2 Application of CMB by Round................................................................................. 3-3
4.0 RESULTS ....................................................................................................................... 4-1
4.1 Experiments 1-8 In Rounds 1, 2 And 4..................................................................... 4-1
4.2 Hourly Source Apportionment Results................................................................... 4-10
4.3 Experiments 9-12: Approaching Ideal Conditions ................................................. 4-14
4.4 Actual Versus Emissions Contributions ................................................................. 4-20
4.5 Defining “Total Organic Compounds” ................................................................... 4-24
5.0 CONCLUSIONS ............................................................................................................ 5-1
5.1 Review of Findings................................................................................................... 5-1
5.2 Evaluation of Stated Assumptions For CMB............................................................ 5-4
5.3 Emissions vs. Ambient Contributions In 4-D Environments.................................... 5-7
REFERENCES.......................................................................................................................... R-1
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