Spatial and Seasonal Patterns and Temporal Variability of Haze and its Constituents in the United States Report VI: June 2023

IMPROVE Report

Entire Document (PDF) Chapters only (no appendices)

Cover-dedication-title-TOC

Executive Summary

Chapter 1 – Interagency Monitoring of Protected Visual Environments (IMPROVE) Network: Configuration and Measurements

Chapter 2 – Spatial Patterns of Speciated PM2.5 Aerosol Mass Concentrations

Chapter 3 – Seasonal Distributions of PM2.5 Aerosol Mass

Chapter 4 – Reconstructed Aerosol Light Extinction Coefficients

Chapter 5 – Seasonal Distribution of Reconstructed Aerosol Light Extinction Coefficients

Chapter 6 – Trends in IMPROVE Speciated Aerosol Concentrations

Chapter 7 – Trends in IMPROVE Reconstructed Light Extinction Coefficients

Chapter 8 – IMPROVE Bibliography 2010 to Present

Appendix 1.1 –A New Cost-Effective Analytical Method for IMPROVE: Nondestructive Infrared Analysis of PTFE Filters to Measure Organic, Elemental, and Total Carbon, Inorganic Ions, Soil Elements, Organic Matter (OM), and Organic Functional Groups

Appendix 1.2 – Documentation of Changes in Analytical Methods and Data Processing Due to the Chemical Speciation Network (CSN) Contractor Changes in 2015

Appendix 2.1– Monthly Varying Organic Carbon to Mass Ratio

Appendix 2.2-2.3 – 2016–2019 IMPROVE and CSN Annual Mean Mass Concentrations and Mass Fractions

Appendix 3.1-3.2 – 2016–2019 IMPROVE and CSN Regional, Monthly Mean Mass Concentrations and Mass Fractions

Appendix 4.1-4.2 – IMPROVE and CSN Monthly Humidification Factors (f(RH))

Appendix 4.3-4.4 – IMPROVE and CSN Annual Mean Light Extinction Coefficients and Extinction Fractions

Appendix 5.1-5.2 – 2016–2019 IMPROVE and CSN Regional, Monthly Mean Light Extinction Coefficients and Fractions

Appendix 6.1-6.3 – IMPROVE Short- and Long-term Annual Mean and Percentile Mass Trends

Appendix 7.1-7.3 – IMPROVE Short- and Long-term Annual Mean and Percentile Light Extinction Coefficient Trends

Appendix 8 – Regional Haze Rule Metrics

Data (excel files)

App2.2_2.3_table_annualmass_fraction_230214.xls

App3.1_3.2_table_regmass_fraction_230215.xls

App4.1_IMP_fRH_230215.csv

App4.2_CSN_fRH_230215.csv

App4.3_4.4_table_annualbext_fraction_230216.xls

App5.1_5.2_table_regionalbext_fraction_230214.xls

App6.1_massanntrend_230717.xls

App6.2_massSTperc_230220.xls

App6.3_massLTperc_230220.xls

App7.1_bextanntrend_230220.xls

App7.2_bextSTperctrend_230220.xls

App7.3_bextLTperctrend_230220.xls