Region

Sulfate

Nitrate

OMC

LAC

Soil

CM

Rep. Distance (km)

Cascade Range

Ave Extinction (1/Mm)

15.57

4.55

14.23

4.09

0.67

2.45

Percent Contribution

0.37

0.11

0.34

0.10

0.02

0.06

Distance (km)

250

0

100

50

400

0

Weighted Distance

94

0

34

5

6

0

139

Central Rocky Mt.

Ave Extinction (1/Mm)

7.46

2.96

19.37

4.10

1.27

4.51

Percent Contribution

0.19

0.07

0.49

0.10

0.03

0.11

Distance (km)

175

75

150

125

125

100

Weighted Distance

33

6

73

13

4

11

140

CO Plateau

Ave Extinction (1/Mm)

7.26

2.78

8.97

2.75

2.45

5.78

Percent Contribution

0.24

0.09

0.30

0.09

0.08

0.19

Distance (km)

275

50

0

0

125

50

Weighted Distance

67

5

0

0

10

10

91

Mexican Highlands

Ave Extinction (1/Mm)

14.04

2.13

8.56

2.44

2.34

7.07

Percent Contribution

0.38

0.06

0.23

0.07

0.06

0.19

Distance (km)

275

100

75

50

150

100

Weighted Distance

106

6

18

3

10

19

161

N. Great Plains

Ave Extinction (1/Mm)

18.43

12.92

8.68

2.63

0.84

4.42

Percent Contribution

0.38

0.27

0.18

0.05

0.02

0.09

Distance (km)

175

225

225

160

275

300

Weighted Distance

67

61

41

9

5

28

210

S. Rocky Mt.

Ave Extinction (1/Mm)

7.96

2.35

8.07

2.36

1.39

4.04

Percent Contribution

0.30

0.09

0.31

0.09

0.05

0.15

Distance (km)

200

75

125

100

220

100

Weighted Distance

61

7

39

9

12

15

142

Sierra NV

Ave Extinction (1/Mm)

11.15

19.05

18.32

5.07

1.26

5.57

Percent Contribution

0.18

0.32

0.30

0.08

0.02

0.09

Distance (km)

275

75

125

75

125

90

Weighted Distance

51

24

38

6

3

8

130