Columbia River Gorge Study

Visibility Progress Report to Gorge Commission
Air Director's Update to Gorge Commission
WRAP Regional Haze Program
Gorge Air Quality Strategy
Gorge Policy Day


Science Summary
Causes of Haze in the Gorge (CoHaGo) Report
Gorge Modeling Report
Gorge Emission Inventory Report


Quick Links


Core Environmental - Aerosols and Haze in the Gorge
  • "On the Composition and Patterns of Aerosols and Haze Within the Columbia River Gorge September 1, 1996 - September 31, 1998," Core Environmental Consulting, January 12, 2001 CoreEnvCompositionandPatternsofHaze.pdf (PDF - 351 kb)
Visibility and Qir Quality in the Gorge
  • "Columbia River Gorge Visibility and Air Quality Study Working Draft: Existing Knowledge and Additional Recommended Scientific Assessment to Consider," Mark C. Green, DRI, June 7, 2001 (updated July 26, 2001) VisibilityAndAirQuality.pdf (PDF - 1.4 Mb)
CBM Study
Chemical Mass Balance Source Apportionment of PM2.5 Aerosol in the Columbia River Gorge
Gorge Calpuff Footprint Analysis - WSU
Study Plan
Fog Water Deposition in the Columbia River Gorge - Phase 1
Atmospheric Nitrogen Deposition
Ozone Injury in West Coast Forests

This report covers six years of monitoring for ozone injury by the Pacific Northwest Research Station Forest Inventory and Analysis Program:

Air Quality Trends in the Gorge - Historical Data
Columbia Gorge Haze Gradient Study

The link below is the Columbia Gorge Haze Gradient Study. Note that at the end is an appendix with time series plots of daily average bsp for each of the nine sites.

Gorge Emission Inventory
Gorge Modeling Protocol

The link below is for a draft modeling protocol from Environ.

Gorge CAMx Modeling Report

The link below is for the modeling report for the Gorge and represents a summary of the above identified presentations for CAMx Modeling.

Comments on above CAMx Modeling Report:

Gorge Air Quality Trends - Air Sciences Report
Air Quality Trends in the Gorge - Historical Data
Analyses of the Causes of Haze for the Central States (Phase II) and Summary of Findings - Exeutive Summary

Prepared for Central States Regional Air Planning Association by Sonoma Technology