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List of Figures
ES–1. Locations of IMPROVE Particulate
Matter Samplers Operating Continuously from 1994–1998
ES–2. Relationship Between the
Light Extinction, Deciview, and Visual Range Scales
1–1. Visibility Impairment (Haze) in Glacier National
Park, Montana
1–2. Visibility Impairment (Haze) in Shenandoah National
Park, Virginia
1–3. Relationship Between the Light
Extinction, Deciview, and Visual Range Scales
1–4. Locations of IMPROVE Particulate
Matter Samplers Operating Continuously from 1994–1998
AL–1. Mandatory Federal Class
I Area and IMPROVE Monitoring Site in Alabama
AL–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Sipsey IMPROVE Particulate Sampler
AL–3. Seasonal Deciview Averages
from 1992–1998 for the Sipsey IMPROVE Particulate Sampler
AL–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Sipsey IMPROVE Particulate Sampler
AL–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Sipsey IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
AL–6. Contributions to Calculated Annual Aerosol
Light Extinction from 1992–1998 for the Sipsey IMPROVE
Particulate Sampler
AK–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Alaska
AK–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Denali IMPROVE Particulate Sampler
AK–3. Seasonal Deciview Averages
from 1988–1998 for the Denali IMPROVE Particulate Sampler
AK–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Denali IMPROVE Particulate Sampler
AK–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Denali IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
AK–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Denali IMPROVE Particulate Sampler
AZ–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Arizona
AZ–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Chiricahua IMPROVE Particulate Sampler
AZ–3. Seasonal Deciview Averages
from 1988–1998 for the Chiricahua IMPROVE Particulate
Sampler
AZ–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Chiricahua IMPROVE Particulate Sampler
AZ–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Chiricahua IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
AZ–6. Contributions to Calculated Annual Aerosol
Light Extinction from 1994–1998 for the Chiricahua IMPROVE
Particulate Sampler
AZ–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1989–1997 for the Grand Canyon IMPROVE Particulate Sampler
AZ–8. Seasonal Deciview Averages
from 1989–1998 for the Grand Canyon IMPROVE Particulate
Sampler
AZ–9. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Grand Canyon IMPROVE Particulate Sampler
AZ–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Grand Canyon IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
AZ–11. Contributions to Calculated Annual Aerosol
Light Extinction from 1989–1997 for the Grand Canyon
IMPROVE Particulate Sampler
AZ–12. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1990–1998 for the Indian Garden IMPROVE Particulate Sampler
AZ–13. Seasonal Deciview Averages
from 1990–1998 for the Indian Garden IMPROVE Particulate
Sampler
AZ–14. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Indian Garden IMPROVE Particulate Sampler
AZ–15. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Indian Garden IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
AZ–16. Contributions to Calculated
Annual Aerosol Light Extinction from 1990–1998 for the
Indian Garden IMPROVE Particulate Sampler
AZ–17. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Petrified Forest IMPROVE Particulate
Sampler
AZ–18. Seasonal Deciview Averages
from 1988–1998 for the Petrified Forest IMPROVE Particulate
Sampler
AZ–19. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Petrified Forest IMPROVE Particulate Sampler
AZ–20. Contribution to Calculated Annual Aerosol Light
Extinction from 1994–1998 for the Petrified Forest IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
AZ–21. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for Petrified
Forest IMPROVE Particulate Sampler
AZ–22. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Tonto IMPROVE Particulate Sampler
AZ–23. Seasonal Deciview Averages
from 1988–1998 for the Tonto IMPROVE Particulate Sampler
AZ–24. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Tonto IMPROVE Particulate Sampler
AZ–25. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Tonto IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
AZ–26. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Tonto IMPROVE Particulate Sampler
AR–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Arkansas
AR–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Upper Buffalo IMPROVE Particulate Sampler
AR–3. Seasonal Deciview Averages
from 1992–1998 for the Upper Buffalo IMPROVEParticulate
Sampler
AR–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Upper Buffalo IMPROVE Particulate Sampler
AR–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Upper Buffalo IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
AR–6. Contribution to Calculated
Annual Aerosol Light Extinction from 1992–1998 for the
Upper Buffalo IMPROVE Particulate Sampler
CA–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in California
CA–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Lassen Volcanic IMPROVE Particulate
Sampler
CA–3. Seasonal Deciview Averages
from 1988–1998 for the Lassen Volcanic IMPROVEParticulate
Sampler
CA–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Lassen Volcanic IMPROVE Particulate Sampler
CA–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Lassen Volcanic IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
CA–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Lassen Volcanic IMPROVE Particulate Sampler
CA–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988-1998 for the Pinnacles IMPROVE Particulate Sampler
CA–8. Seasonal Deciview Averages
from 1988–1998 for the Pinnacles IMPROVE Particulate
Sampler
CA–9. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Pinnacles IMPROVE Particulate Sampler
CA–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Pinnacles IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
CA–11. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Pinnacles IMPROVE Particulate Sampler
CA–12. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Point Reyes IMPROVE Particulate Sampler
CA–13. Seasonal Deciview Averages
from 1988–1998 for the Point Reyes IMPROVE Particulate
Sampler
CA–14. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Point Reyes IMPROVE Particulate Sampler
CA–15. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Point Reyes IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
CA–16. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Point Reyes IMPROVE Particulate Sampler
CA–17. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Redwood IMPROVE Particulate Sampler
CA–18. Seasonal Deciview Averages
from 1988–1998 for the Redwood IMPROVE Particulate Sampler
CA–19. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Redwood IMPROVE Particulate Sampler
CA–20. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Redwood IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
CA–21. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Redwood IMPROVE Particulate Sampler
CA–22. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the San Gorgonio IMPROVE Particulate Sampler
CA–23. Seasonal Deciview Averages
from 1988–1998 for the San Gorgonio IMPROVEParticulate
Sampler
CA–24. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
San Gorgonio IMPROVE Particulate Sampler
CA–25. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the San Gorgonio IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
CA–26. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
San Gorgonio IMPROVE Particulate Sampler
CA–27. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Yosemite IMPROVE Particulate Sampler
CA–28. Seasonal Deciview Averages
from 1988–1998 for the Yosemite IMPROVE Particulate Sampler
CA–29. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Yosemite IMPROVE Particulate Sampler
CA–30. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Yosemite IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
CA–31. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Yosemite IMPROVE Particulate Sampler
CO–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Colorado
CO–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Great Sand Dunes IMPROVE Particulate
Sampler
CO–3. Seasonal Deciview Averages
from 1988–1998 for the Great Sand Dunes IMPROVEParticulate
Sampler
CO–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Great Sand Dunes IMPROVE Particulate Sampler
CO–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Great Sand Dunes IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
CO–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Great Sand Dunes IMPROVE Particulate Sampler
CO–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Mesa Verde IMPROVE Particulate Sampler
CO–8. Seasonal Deciview Averages
from 1988–1998 for the Mesa Verde IMPROVE Particulate
Sampler
CO–9. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Mesa Verde IMPROVE Particulate Sampler
CO–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Mesa Verde IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
CO–11. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Mesa Verde IMPROVE Particulate Sampler
CO–12. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Rocky Mountain IMPROVE Particulate
Sampler
CO–13. Seasonal Deciview Averages
from 1988–1998 for the Rocky Mountain IMPROVE Particulate
Sampler
CO–14. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Rocky Mountain IMPROVE Particulate Sampler
CO–15. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Rocky Mountain IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
CO–16. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Rocky Mountain IMPROVE Particulate Sampler
CO–17. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Weminuche IMPROVE Particulate Sampler
CO–18. Seasonal Deciview Averages
from 1988–1998 for the Weminuche IMPROVEParticulate Sampler
CO–19. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Weminuche IMPROVE Particulate Sampler
CO–20. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Weminuche IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
CO–21. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Weminuche IMPROVE Particulate Sampler
FL–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Florida
FL–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1993–1998 for the Chassahowitzka IMPROVE Particulate
Sampler
FL–3. Seasonal Deciview Averages
from 1993–1998 for the Chassahowitzka IMPROVEParticulate
Sampler
FL–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Chassahowitzka IMPROVE Particulate Sampler
FL–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Chassahowitzka IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
FL–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1993–1998 for the
Chassahowitzka IMPROVE Particulate Sampler
GA–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Georgia
GA–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Okefenokee IMPROVE Particulate Sampler
GA–3. Seasonal Deciview Averages
from 1992–1998 for the Okefenokee IMPROVE Particulate
Sampler
GA–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Okefenokee IMPROVE Particulate Sampler
GA–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Okefenokee IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
GA–6. Contributions to Calculated Annual Aerosol
Light Extinction from 1992–1998 for the Okefenokee IMPROVE
Particulate Sampler
KY–1. Mandatory Federal Class
I Area and IMPROVE Monitoring Site in Kentucky
KY–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Mammoth Cave IMPROVE Particulate Sampler
KY–3. Seasonal Deciview Averages
from 1992–1998 for the Mammoth Cave IMPROVEParticulate
Sampler
KY–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Mammoth Cave IMPROVE Particulate Sampler
KY–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Mammoth Cave IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
KY–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1992–1998 for the
Mammoth Cave IMPROVE Particulate Sampler
ME–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Maine
ME–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Acadia IMPROVE Particulate Sampler
ME–3. Seasonal Deciview Averages
from 1988–1998 for the Acadia IMPROVE Particulate Sampler
ME–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Acadia IMPROVE Particulate Sampler
ME–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Acadia IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
ME–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Acadia IMPROVE Particulate Sampler
MN–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Minnesota
MN–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Boundary Waters IMPROVE Particulate
Sampler
MN–3. Seasonal Deciview Averages
from 1992–1998 for the Boundary Waters IMPROVE Particulate
Sampler
MN–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Boundary Waters IMPROVE Particulate Sampler
MN–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Boundary Waters IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
MN–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1992–1998 for the
Boundary Waters IMPROVE Particulate Sampler
MT–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Montana
MT–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Glacier IMPROVE Particulate Sampler
MT–3. Seasonal Deciview Averages
from 1988–1998 for the Glacier IMPROVE Particulate Sampler
MT–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Glacier IMPROVE Particulate Sampler
MT–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Glacier IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
MT–6. Contributions to Calculated
Annual Aerosol Light Extinction From 1988–1998 for Glacier
IMPROVE Particulate Sampler
NV–1. Mandatory Federal Class
I Area and IMPROVE Monitoring Sites in Nevada
NV–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Jarbidge IMPROVE Particulate Sampler
NV–3. Seasonal Decivew Averages
from 1988–1998 for the Jarbidge IMPROVEParticulate Sampler
NV–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Jarbidge IMPROVE Particulate Sampler
NV–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Jarbidge IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
NV–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Jarbidge IMPROVE Particulate Sampler
NJ–1. Mandatory Federal Class
I Area and IMPROVE Monitoring Site in New Jersey
NJ–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Brigantine IMPROVE Particulate Sampler
NJ–3. Seasonal Deciview Averages
from 1992–1998 for the Brigantine IMPROVE Particulate
Sampler
NJ–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
the Brigantine IMPROVE Particulate Sampler
NJ–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Brigantine IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
NJ–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1992–1998 for the
Brigantine IMPROVE Particulate Sampler
NM–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in New Mexico
NM–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Bandelier IMPROVE Particulate Sampler
NM–3. Seasonal Deciview Averages
from 1988–1998 for the Bandelier IMPROVE Particulate
Sampler
NM–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Bandelier IMPROVE Particulate Sampler
NM–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Bandelier IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
NM–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Bandelier IMPROVE Particulate Sampler
OR–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Oregon
OR–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Crater Lake IMPROVE Particulate Sampler
OR–3. Seasonal Deciview Averages
from 1988–1998 for the Crater Lake IMPROVEParticulate
Sampler
OR–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Crater Lake IMPROVE Particulate Sampler
OR–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Crater Lake IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
OR–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Crater Lake IMPROVE Particulate Sampler
OR–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Daysfrom
1994–1998 for the Three Sisters IMPROVE Particulate Sampler
OR–8. Seasonal Deciview Averages
from 1994–1998 for the Three Sisters IMPROVEParticulate
Sampler
OR–9. Contribution to Calculated
Annual Light Extinction from 1994–1998 for the Three
Sisters IMPROVE Particulate Sampler
OR–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Three Sisters IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
OR–11. Contributions to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Three Sisters IMPROVE Particulate Sampler
SD–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in South Dakota
SD–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Badlands IMPROVE Particulate Sampler
SD–3. Seasonal Deciview Averages
from 1988–1998 for the Badlands IMPROVE Particulate Sampler
SD–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Badlands IMPROVE Particulate Sampler
SD–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Badlands IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
SD–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Badlands IMPROVE Particulate Sampler
TN–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Tennessee
TN–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Great Smoky Mountains IMPROVE Particulate
Sampler
TN–3. Seasonal Deciview Averages
from 1988–1998 for the Great Smoky MountainsIMPROVE Particulate
Sampler
TN–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Great Smoky Mountains IMPROVE Particulate Sampler
TN–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Great Smoky Mountains
IMPROVE Particulate Sampler
Spring Summer
Autumn Winter
TN–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Great Smoky Mountains IMPROVE Particulate Sampler
TX–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Texas
TX–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Big Bend IMPROVE Particulate Sampler
TX–3. Seasonal Deciview Averages
from 1988–1998 for the Big Bend IMPROVE Particulate Sampler
TX–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Big Bend IMPROVE Particulate Sampler
TX–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Big Bend IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
TX–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Big Bend IMPROVE Particulate Sampler
TX–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Guadalupe Mountains IMPROVE Particulate
Sampler
TX–8. Seasonal Deciview Averages
from 1988–1998 for the Guadalupe MountainsIMPROVE Particulate
Sampler
TX–9. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Guadalupe Mountains IMPROVE Particulate Sampler
TX–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Guadalupe Mountains
IMPROVE Particulate Sampler
Spring Summer
Autumn Winter
TX–11. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Guadalupe Mountains IMPROVE Particulate Sampler
UT–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Utah
UT–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Bryce Canyon IMPROVE Particulate Sampler
UT–3. Seasonal Deciview Averages
from 1988–1998 for the Bryce Canyon IMPROVEParticulate
Sampler
UT–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Bryce Canyon IMPROVE Particulate Sampler
UT–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Bryce Canyon IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
UT–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Bryce Canyon IMPROVE Particulate Sampler
UT–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Canyonlands IMPROVE Particulate Sampler
UT–8. Seasonal Deciview Averages
from 1988–1998 for the Canyonlands IMPROVEParticulate
Sampler
UT–9. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Canyonlands IMPROVE Particulate Sampler
UT–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Canyonlands IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
UT–11. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Canyonlands IMPROVE Particulate Sampler
VT–1. Mandatory Federal Class
I Area and IMPROVE Monitoring Site in Vermont
VT–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Lye Brook IMPROVE Particulate Sampler
VT–3. Seasonal Deciview Averages
from 1992–1998 for the Lye Brook IMPROVE Particulate
Sampler
VT–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Lye Brook IMPROVE Particulate Sampler
VT–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Lye Brook IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
VT–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1992–1998 for the
Lye Brook IMPROVE Particulate Sampler
VA–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in Virginia
VA–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Shenandoah IMPROVE Particulate Sampler
VA–3. Seasonal Deciview Averages
from 1988–1998 for the Shenandoah IMPROVEParticulate
Sampler
VA–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Shenandoah IMPROVE Particulate Sampler
VA–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Shenandoah IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
VA–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Shenandoah IMPROVE Particulate Sampler
WA–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Washington
WA–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Mount Rainier IMPROVE Particulate Sampler
WA–3. Seasonal Deciview Averages
from 1988–1998 for the Mount Rainier IMPROVEParticulate
Sampler
WA–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Mount Rainier IMPROVE Particulate Sampler
WA–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Mount Rainier IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
WA–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Mount Rainier IMPROVE Particulate Sampler
WA–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1994–1998 for the Snoqualmie Pass IMPROVE Particulate
Sampler
WA–8. Seasonal Deciview Averages
from 1994–1998 for the Snoqualmie Pass IMPROVE Particulate
Sampler
WA–9. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Snoqualmie Pass IMPROVE Particulate Sampler
WA–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Snoqualmie Pass IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
WA–11. Contributions to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Snoqualmie Pass IMPROVE Particulate Sampler
WV–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Site in West Virginia
WV–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1992–1998 for the Dolly Sods IMPROVE Particulate Sampler
WV–3. Seasonal Deciview Averages
from 1992–1998 for the Dolly Sods IMPROVE Particulate
Sampler
WV–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Dolly Sods IMPROVE Particulate Sampler
WV–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Dolly Sods IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
WV–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1992–1998 for the
Dolly Sods IMPROVE Particulate Sampler
WY–1. Mandatory Federal Class
I Areas and IMPROVE Monitoring Sites in Wyoming
WY–2. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Bridger IMPROVE Particulate Sampler
WY–3. Seasonal Deciview Averages
from 1988–1998 for the Bridger IMPROVE Particulate Sampler
WY–4. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Bridger IMPROVE Particulate Sampler
WY–5. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Bridger IMPROVE Particulate
Sampler
Spring Summer
Autumn Winter
WY–6. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Bridger IMPROVE Particulate Sampler
WY–7. Yearly Deciview Averages
for Most-Impaired, Mid-Range, and Least-Impaired Days from
1988–1998 for the Yellowstone IMPROVE Particulate Sampler
WY–8. Seasonal Deciview Averages
from 1988–1998 for the Yellowstone IMPROVE Particulate
Sampler
WY–9. Contribution to Calculated
Annual Aerosol Light Extinction from 1994–1998 for the
Yellowstone IMPROVE Particulate Sampler
WY–10. Contribution to Calculated Seasonal Aerosol Light
Extinction from 1994–1998 for the Yellowstone IMPROVE
Particulate Sampler
Spring Summer
Autumn Winter
WY–11. Contributions to Calculated
Annual Aerosol Light Extinction from 1988–1998 for the
Yellowstone IMPROVE Particulate Sampler
3–1. Annual Average Visibility
Indices for Least-Impaired Days from 1994–1998
3–2. IMPROVE Sites Showing
Statistically Significant Trends in Visibility on Least-Impaired
Days
3–3. Annual Average Visibility
Indices for Mid-Range Days from 1994–1998
3–4. IMPROVE Sites Showing
Statistically Significant Trends in Visibility on Mid-Range
Days
3–5. Annual Average Visibility
Indices for Most-Impaired Days from 1994–1998
3–6. IMPROVE Sites Showing
Statistically Significant Trends in Visibility on Most-Impaired
Days
3–7. Average Annual Sulfate
PM Concentrations at IMPROVE Monitoring from 1994–1998
3–8. Average Annual Contributions
of Sulfate PM to Total PM2.5 Levels at IMPROVE Monitoring
Sites from 1994–1998
3–9. Average Annual Sulfate
Extinction Coefficients at IMPROVE Monitoring Sites from 1994–1998
3–10. Average Annual Contributions
of Sulfate PM to Calculated Aerosol Light Extinction at IMPROVE
Monitoring Sites from 1994–1998
3–11. Average Annual Nitrate
PM Concentrations at IMPROVE Monitoring Sites from 1994–1998
3–12. Average Annual Contributions
of Nitrate PM to Total PM2.5 Levels at IMPROVE Monitoring
Sites from 1994–1998
3–13. Average Annual Nitrate
Extinction Coefficients at IMPROVE Monitoring Sites from 1994–1998
3–14. Average Annual Contributions
of Nitrate PM to Calculated Aerosol Light Extinction at IMPROVE
Monitoring Sites from 1994–1998
3–15. Level of Photosynthetic
Activity in Vegetation during July 1988
3–16. Average Annual Organic
Carbon PM Concentrations at IMPROVE Monitoring Sites from
1994–1998
3–17. Average Annual Contributions
of Organic Carbon PM to Total PM2.5 Levels at IMPROVE Monitoring
Sites from 1994–1998
3–18. Average Annual Organic
Carbon Extinction Coefficients at IMPROVE Monitoring Sites
from 1994–1998
3–19. Average Annual Contributions
of Organic Carbon PM to Calculated Aerosol Light Extinction
at IMPROVE Monitoring Sites from 1994–1998
3–20. Average Annual Elemental
Carbon PM Concentrations at IMPROVE Monitoring Sites from
1994–1998
3–21. Average Annual Contributions
of Elemental Carbon PM to Total PM2.5 Levels at IMPROVE Monitoring
Sites from 1994–1998
3–22. Average Annual Elemental
Carbon Extinction Coefficients at IMPROVE MonitoringSites
from 1994–1998
3–23. Average Annual Contributions
of Elemental Carbon PM to Calculated Aerosol Light Extinction
at IMPROVE Monitoring Sites from 1994–1998
3–24. Average Annual Fine
Soil PM Concentrations at IMPROVE Monitoring Sites from 1994–1998
3–25. Average Annual Contributions
of Fine Soil PM to Total PM2.5 levels at IMPROVE Monitoring
Sites from 1994–1998
3–26. Average Annual Crustal
Material Extinction Coefficients at IMPROVE MonitoringSites
from 1994–1998
3–27. Average Annual Contributions
of Crustal Material PM to Calculated Aerosol Light Extinction
at IMPROVE Monitoring Sites from 1994–1998
3–28. Mandatory Federal Class I
Areas and IMPROVE Particulate Matter Samplers Divided into
Western and Eastern Regions
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