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![Page 1: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/1.jpg)
Georgia Institute of Technology
Sensitivity of Future Year Results to Boundary
Conditions
Jim Boylan, Talat Odman, Ted Russell
February 6, 2001
![Page 2: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/2.jpg)
Georgia Institute of Technology
Overview• July 1995 Episode with 2040 BWC emissions
– Initial and Boundary Conditions reduced by the same ratio that domain-wide emissions were reduced
• NOx reduced 50%• SO2, SO4, and NH4 reduced 63%
• Comparison of Results– Basecase Results vs. 2040 BWC Results (original BCs)– 2040 BWC with Original BCs vs. 2040 BWC with Reduced BCs– Spatial and Station Plots
• Ozone• Sulfate, Nitrate, and Ammonium Aerosols• Sulfate, Nitrate, and Ammonium Wet Deposition
![Page 3: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/3.jpg)
Georgia Institute of Technology
Ozone on July 16, 2040 (1:00 PM)
![Page 4: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/4.jpg)
Georgia Institute of Technology
Ozone Change on July 16 (1:00 PM)
![Page 5: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/5.jpg)
Georgia Institute of Technology
Ozone on July 16, 2040 (9:00 PM)
![Page 6: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/6.jpg)
Georgia Institute of Technology
Ozone Change on July 16 (9:00 PM)
![Page 7: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/7.jpg)
Georgia Institute of Technology
Ozone at Great Smoky Mountains
Look Rock (TN) - July 1995
0.020
0.030
0.040
0.050
0.060
0.070
0.080
0.090
11 12 13 14 15 16 17 18 19 20
Ozo
ne
(pp
m)
O3_base O3_2040_bwc O3_2040_bwc_scaled_BC
![Page 8: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/8.jpg)
Georgia Institute of Technology
Ozone at Shenandoah National Park
Big Meadows (VA) - July 1995
0.020
0.030
0.040
0.050
0.060
0.070
0.080
0.090
11 12 13 14 15 16 17 18 19 20
Ozo
ne
(pp
m)
O3_base O3_2040_bwc O3_2040_bwc_scaled_BC
![Page 9: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/9.jpg)
Georgia Institute of Technology
Ozone at Atlanta
South DeKalb (GA) - July 1995
0.000
0.010
0.020
0.030
0.040
0.050
0.060
0.070
0.080
0.090
0.100
11 12 13 14 15 16 17 18 19 20
Ozo
ne
(pp
m)
O3_base O3_2040_bwc O3_2040_bwc_scaled_BC
![Page 10: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/10.jpg)
Georgia Institute of Technology
Average Sulfate on July 15, 2040
![Page 11: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/11.jpg)
Georgia Institute of Technology
Average Sulfate Change on July 15
![Page 12: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/12.jpg)
Georgia Institute of Technology
Sulfate at Great Smoky Mountains
Great Smoky Mountains (TN) - Average Sulfate (g/m3)(Basecase & BWC)
0.0
5.0
10.0
15.0
20.0
25.0
7/11/95 7/12/95 7/13/95 7/14/95 7/15/95 7/16/95 7/17/95 7/18/95 7/19/95
SULF_base SULF_2040 SULF_2040_scaled_BC
![Page 13: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/13.jpg)
Georgia Institute of Technology
Sulfate at Shenandoah National Park
Shenandoah National Park (VA) - Average Sulfate (g/m3)(Basecase & BWC)
0.0
5.0
10.0
15.0
20.0
25.0
7/11/95 7/12/95 7/13/95 7/14/95 7/15/95 7/16/95 7/17/95 7/18/95 7/19/95
SULF_base SULF_2040 SULF_2040_scaled_BC
![Page 14: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/14.jpg)
Georgia Institute of Technology
Average Nitrate on July 15, 2040
![Page 15: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/15.jpg)
Georgia Institute of Technology
Average Nitrate Change on July 15
![Page 16: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/16.jpg)
Georgia Institute of Technology
Nitrate at Great Smoky Mountains
Great Smoky Mountains (TN) - Average Nitrate (g/m3)(Basecase & 2040 BWC)
0.0
0.4
0.8
1.2
1.6
2.0
7/11/95 7/12/95 7/13/95 7/14/95 7/15/95 7/16/95 7/17/95 7/18/95 7/19/95
NITF_base NITF_2040 NITF_2040_scaled_BC
![Page 17: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/17.jpg)
Georgia Institute of Technology
Nitrate at Shenandoah National Park
Shenandoah National Park (VA) - Average Nitrate (g/m3)(Basecase & 2040 BWC)
0.0
0.4
0.8
1.2
1.6
2.0
7/11/95 7/12/95 7/13/95 7/14/95 7/15/95 7/16/95 7/17/95 7/18/95 7/19/95
NITF_base NITF_2040 NITF_2040_scaled_BC
![Page 18: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/18.jpg)
Georgia Institute of Technology
Average Ammonium on July 15, 2040
![Page 19: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/19.jpg)
Georgia Institute of Technology
Average Ammonium Change on July 15
![Page 20: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/20.jpg)
Georgia Institute of Technology
Ammonium at Great Smoky Mountains
Great Smoky Mountains (TN) - Average Ammonium (g/m3)(Basecase & 2040 BWC)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
7/11/95 7/12/95 7/13/95 7/14/95 7/15/95 7/16/95 7/17/95 7/18/95 7/19/95
AMNF_base AMNF_2040 AMNF_2040_scaled_BC
![Page 21: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/21.jpg)
Georgia Institute of Technology
Ammonium at Shenandoah National Park
Shenandoah National Park (VA) - Average Ammonium (g/m3)(Basecase & 2040 BWC)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
7/11/95 7/12/95 7/13/95 7/14/95 7/15/95 7/16/95 7/17/95 7/18/95 7/19/95
AMNF_base AMNF_2040 AMNF_2040_scaled_BC
![Page 22: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/22.jpg)
Georgia Institute of Technology
Weekly Sulfate Deposition (2040)
![Page 23: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/23.jpg)
Georgia Institute of Technology
Weekly Sulfate Deposition Change
![Page 24: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/24.jpg)
Georgia Institute of Technology
Weekly Sulfate Deposition Change
Weekly Sulfate Wet Deposition(Basecase & 2040 BWC)
0.0
10.0
20.0
30.0
40.0
50.0
60.0
Great Smoky Mountains Shenandoah National Park
Su
lfate
Flu
x (m
g/m
2)
SO4_base SO4_2040 SO4_2040_scaled_BC
![Page 25: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/25.jpg)
Georgia Institute of Technology
Weekly Nitrate Deposition (2040)
![Page 26: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/26.jpg)
Georgia Institute of Technology
Weekly Nitrate Deposition Change
![Page 27: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/27.jpg)
Georgia Institute of Technology
Weekly Nitrate Deposition Change
Weekly Nitrate Wet Deposition(Basecase & 2040 BWC)
0.0
5.0
10.0
15.0
20.0
Great Smoky Mountains Shenandoah National Park
Nitr
ate
Flu
x (m
g/m
2)
SO4_base SO4_2040 SO4_2040_scaled_BC
![Page 28: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/28.jpg)
Georgia Institute of Technology
Weekly Ammonium Deposition (2040)
![Page 29: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/29.jpg)
Georgia Institute of Technology
Weekly Ammonium Deposition Change
![Page 30: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/30.jpg)
Georgia Institute of Technology
Weekly Ammonium Deposition Change
Weekly Ammonium Wet Deposition(Basecase & 2040 BWC)
0.0
5.0
10.0
15.0
20.0
Great Smoky Mountains Shenandoah National Park
NH
4 F
lux
(mg
/m2)
SO4_base SO4_2040 SO4_2040_scaled_BC
![Page 31: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/31.jpg)
Georgia Institute of Technology
Summary of Reducing BCs
• Ozone– decrease 5 -8 ppb off daily maximum– additional 20 - 25% reduction from basecase
• Aerosols– Sulfate
• decrease 2 -3 g/m3 off daily average• additional 10 -15% reduction from basecase
– Nitrate• changed by less than 0.5 g/m3 (+ or -)
– Ammonium• decrease 0.5 - 1.0 g/m3 off daily average• additional 20 - 30% reduction from basecase
![Page 32: Georgia Institute of Technology Sensitivity of Future Year Results to Boundary Conditions Jim Boylan, Talat Odman, Ted Russell February 6, 2001.](https://reader036.fdocuments.in/reader036/viewer/2022062519/5697c00f1a28abf838cca7c9/html5/thumbnails/32.jpg)
Georgia Institute of Technology
Summary of Reducing BCs
• Wet Deposition– Sulfate
• additional 15% reduction from basecase
– Nitrate• little change
– Ammonium• additional 5 - 10% reduction from basecase