Improve

Final Report – PREVENT

The Pacific Northwest Regional Visibility Experiment Using Natural Tracers

Principal Authors: William C. Malm¹, Kristi Gebhart¹, John Molenar², Robert Eldred³, Halstead Harrison⁴

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Cover Page

Table of Contents

Overview and Synopsis

Chapter 1: Introduction

Chapter 2: Field Monitoring Program

Chapter 3: Optical Data Analysis

Chapter 4: Aerosol Sample Analysis

Chapter 5: A Weather Summary for the Pacific Northwest,July 6-September 6, 1990

Chapter 6: Characteristics of Particulate Concentrations and their Optical Properties

Chapter 7: Aerosol Acidity

Chapter 8: Exploration of Relationships among Aerosols

Chapter 9: Attribution of Aerosol Species to Sources Using Chemical Mass Balance and Regression Analysis

Chapter 10: Analysis of Air Mass Back Trajectories

Chapter 11: Spatial and Temporal Patterns in Measured Data

Appendix 1-Addendum

Appendix 2

Appendix 3

Appendix 4

Appendix 5

Appendix 6

Appendix 7

Appendix 8

Appendix 9

Appendix 10

¹National Park Service-Air Resources Division
²Air Resources Specialists, Inc.
³Crocker Nuclear Laboratory
⁴Wyndsoft, Inc.