AoH Conference Call October 8, 2004 Air Resource Specialists, Inc.
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Transcript of AoH Conference Call October 8, 2004 Air Resource Specialists, Inc.
AoH Conference CallOctober 8, 2004
Air Resource Specialists, Inc.
Review of IMPROVE Aerosol Data
• Visibility parameters and equations• IMPROVE monitoring• Regional Haze Rule data guidelines• Review of 2002 IMPROVE data (selected sites)• Next steps
Definitions of Visibility
• Visual Qualities - The color, texture, and clarity of a scene
• Visual Range (km) - The greatest distance at which a large black object on the horizon can be seen
• Extinction/Scattering/Absorption (Mm-1) - The fraction of light lost per unit length along a sight path
• Deciview (dv) - An index which is linear with human perception of visibility
Visibility Equations
• Extinction is the sum of particle scattering, natural atmospheric scattering, and absorption:
bext = bsp + bRayleigh + babs
• Extinction can be converted into Visual Range or Deciview:
Visual Range (km) = 3912 / bext
Deciview (dv) = 10 x ln (bext / 10)
bext (Mm-1) = 3 * f(RH) * [Ammonium SULFATE]
+ 3 * f(RH) * [Ammonium NITRATE]
+ 4 * (1.4) * [ORGANIC CARBON]
+ 10 * [ELEMENTAL CARBON]
+ 1 * [SOIL]
+ 0.6 * [COARSE MASS]
+ Rayleigh scattering (typically use 10 Mm-
1)
Where:• f(RH) is the relative humidity enhancement factor• Elemental carbon is the only species which absorbs light
IMPROVE Extinction Equation
IMPROVE Aerosol Sampler Systems
•Sulfur>>Sulfate•Soil•PM2.5>> Coarse Mass
•Nitrate•Sulfate (backup)
•Organic Carbon•Elem. Carbon
•PM10>> Coarse Mass
Regional Haze Rule Data Guidelines• Calculate extinction based on IMPROVE equation, using
6 species and monthly f(RH)• Allowed to fill in missing species data with quarterly
median values if strict conditions are met• Data completeness:
– 50% for all quarters– 75% for the year– No more than 10 consecutive samples missing in a year– Minumum of 3 complete years needed to represent 5 year
average
• Convert extinction to deciview• Calculate annual 20% best and worst deciview averages
Class I Areas
Federal Tribal
WRAP Class I Areas
Class I Areas
> 3 years (through 2002)
IMPROVE Monitoring Sites
1 - 3 years
< 1 year
C lass I O ther
Federa l Tribal
IMPROVE Monitoring Sites
IMPROVE Total Aerosol ExtinctionWorst 20% for 2002
VIEWS web site: http://vista.cira.colostate.edu/views/Web/AnnualSummary/ContourMaps.aspx
IMPROVE Ammonium Sulfate ExtinctionWorst 20% for 2002
VIEWS web site: http://vista.cira.colostate.edu/views/Web/AnnualSummary/ContourMaps.aspx
IMPROVE Ammonium Nitrate ExtinctionWorst 20% for 2002
VIEWS web site: http://vista.cira.colostate.edu/views/Web/AnnualSummary/ContourMaps.aspx
IMPROVE Organic Mass ExtinctionWorst 20% for 2002
VIEWS web site: http://vista.cira.colostate.edu/views/Web/AnnualSummary/ContourMaps.aspx
2002 Data from Selected Sites
• Timeline species extinction plots for 6 sites across WRAP:– Spokane Indian Reservation, WA– Medicine Lake, MT (adjacent to Fort Peck)– Rocky Mountain NP, CO– Grand Canyon NP, AZ– Yosemite NP, CA– Crater Lake, OR
Medicine Lake, MT - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
Spokane Indian Reservation, WA - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
Rocky Mountain NP, CO - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
Grand Canyon NP, AZ - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
Yosemite NP, CA - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
Crater Lake, OR - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
200-400 Mm-1 >>
Yosemite NP, CA - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
Crater Lake, OR - 2002 Reconstructed Extinction
20% Worst
0
25
50
75
100
125
150
1/2
1/11
1/20
1/29 2/
72/
162/
25 3/6
3/15
3/24 4/
24/
114/
204/
29 5/8
5/17
5/26 6/
46/
136/
22 7/1
7/10
7/19
7/28 8/
68/
158/
24 9/2
9/11
9/20
9/29
10/8
10/1
710
/26
11/4
11/1
311
/22
12/1
12/1
012
/19
12/2
8
Ext
inct
ion
(M
m-1
) Coarse Mass
Soil
Organic Mass
Elem. Carbon
Amm. Nitrate
Amm. Sulfate
Rayleigh
Module A filter clogged – removed data from 2002 data set
Avg. extinction: 24.8 Mm-1Avg. extinction: 48.9 Mm-1
Crater LakeRecon. Aerosol Extinction Comparison
2002
Amm. Sulfate30%
Amm. Nitrate
11%
Organic Mass36%
Elem. Carbon
11%Soil3%
Coarse Mass9%
2002 (w/ clogged filter data)
Amm. Sulfate
12%
Amm. Nitrate
6%
Organic Mass62%
Coarse Mass5%
Soil1%
Elem. Carbon
14%
Crater LakeRecon. Aerosol Extinction Comparison
Avg. extinction: 23.9 Mm-1 Avg. extinction: 24.8 Mm-1
1997-2002 (excl. 2000, 2001)
Amm. Sulfate30%
Amm. Nitrate
9%
Organic Mass34%
Elem. Carbon
12%
Soil3%
Coarse Mass12%
2002
Amm. Sulfate30%
Amm. Nitrate
11%
Organic Mass36%
Elem. Carbon
11%Soil3%
Coarse Mass9%
Grand CanyonRecon. Aerosol Extinction Comparison
Avg. extinction: 21.8 Mm-1
1997-2002 (excl. 1998, 2001)
Amm. Sulfate32%
Amm. Nitrate
9%
Organic Mass26%
Elem. Carbon
8%
Soil6%
Coarse Mass19%
2002
Amm. Sulfate32%
Amm. Nitrate
11%
Organic Mass26%
Elem. Carbon
9%
Soil7%
Coarse Mass15%
Avg. extinction: 23.4 Mm-1
Next Steps
• Conference call week of October 18
• Working with RMC to transfer emission and TSSA data files to ARS
• Begin adding draft documents to the AoH web site (introductory materials first)
• Prepare samples of CIA reports on AoH web site (currently based on available data)
• Review agenda for November meeting
