|
Tonto National Monument Trends Analysis |
|
| The tables and figures below
show the trends analysis
results for 20% worst, middle 60% and 20% best days at TONT1 based on
light extinction coefficient
data from 1994 to 2003. A significant increase trend is found for total aerosol
light extinction in 20% worst days, caused mainly by increase in nitrate,
soil and CM extinctions.
A significant decrease in total aerosol light extinction coefficients is
found in 20% best days. |
|
|
| Table 1. Number of valid
measurements used in the trends analysis |
|
|
Site |
Year |
StartDate |
EndDate |
NoMeas |
|
TONT1 |
1994 |
1/1/1994 |
12/31/1994 |
98 |
|
TONT1 |
1995 |
1/4/1995 |
12/9/1995 |
98 |
|
TONT1 |
1996 |
1/10/1996 |
12/28/1996 |
98 |
|
TONT1 |
1997 |
1/1/1997 |
12/31/1997 |
94 |
|
TONT1 |
1998 |
1/3/1998 |
12/30/1998 |
98 |
|
TONT1 |
1999 |
1/2/1999 |
12/18/1999 |
98 |
|
TONT1 |
2000 |
2/16/2000 |
12/29/2000 |
86 |
|
TONT1 |
2001 |
1/1/2001 |
12/21/2001 |
114 |
|
TONT1 |
2002 |
1/2/2002 |
12/31/2002 |
108 |
|
TONT1 |
2003 |
1/3/2003 |
12/29/2003 |
105 |
|
|
| Table 2. Trends analysis for
20% worst visibility days |
|
|
Site |
Year |
Bep (1/Mm) |
Sulfate_Ext (1/Mm) |
Nitrate_Ext (1/Mm) |
OMC_Ext (1/Mm) |
LAC_Ext (1/Mm) |
Soil_Ext (1/Mm) |
CM_Ext (1/Mm) |
|
TONT1 |
1994 |
28.74 |
9.24 |
1.54 |
8.41 |
3.45 |
1.51 |
4.59 |
|
TONT1 |
1995 |
34.55 |
10.90 |
1.55 |
10.36 |
4.55 |
1.12 |
6.06 |
|
TONT1 |
1996 |
33.22 |
10.10 |
1.61 |
8.30 |
3.40 |
1.46 |
8.35 |
|
TONT1 |
1997 |
30.59 |
11.31 |
1.69 |
7.13 |
2.60 |
1.38 |
6.47 |
|
TONT1 |
1998 |
34.07 |
11.35 |
2.34 |
9.31 |
3.94 |
1.28 |
5.84 |
|
TONT1 |
1999 |
37.17 |
7.07 |
2.97 |
13.21 |
4.65 |
1.63 |
7.65 |
|
TONT1 |
2000 |
35.85 |
8.29 |
4.00 |
9.46 |
2.46 |
2.99 |
8.65 |
|
TONT1 |
2001 |
32.32 |
8.03 |
3.03 |
8.52 |
3.18 |
1.86 |
7.71 |
|
TONT1 |
2002 |
36.34 |
9.15 |
3.29 |
10.75 |
3.32 |
2.80 |
7.02 |
|
TONT1 |
2003 |
40.93 |
7.22 |
3.87 |
11.26 |
3.10 |
4.42 |
11.06 |
|
|
|
|
|
|
|
|
|
|
|
Slope (1/Mm/Year) |
|
0.798 |
-0.357 |
0.281 |
0.293 |
-0.043 |
0.223 |
0.396 |
|
S-Value |
|
23 |
-15 |
39 |
17 |
-13 |
27 |
23 |
|
P-Value |
|
0.023 |
0.108 |
0.000 |
0.078 |
0.146 |
0.008 |
0.023 |
|
 |
|
| Table 3. Trends analysis for
middle 60% visibility days |
|
|
Site |
Year |
Bep (1/Mm) |
Sulfate_Ext (1/Mm) |
Nitrate_Ext (1/Mm) |
OMC_Ext (1/Mm) |
LAC_Ext (1/Mm) |
Soil_Ext (1/Mm) |
CM_Ext (1/Mm) |
|
TONT1 |
1994 |
18.98 |
6.40 |
1.51 |
4.46 |
2.45 |
0.80 |
3.36 |
|
TONT1 |
1995 |
20.75 |
6.50 |
1.43 |
5.03 |
2.64 |
0.91 |
4.22 |
|
TONT1 |
1996 |
20.42 |
6.30 |
1.32 |
4.32 |
1.95 |
1.09 |
5.43 |
|
TONT1 |
1997 |
19.23 |
7.11 |
1.24 |
3.91 |
2.03 |
0.79 |
4.16 |
|
TONT1 |
1998 |
19.83 |
6.25 |
1.63 |
5.05 |
2.27 |
0.84 |
3.80 |
|
TONT1 |
1999 |
20.38 |
6.19 |
1.29 |
5.49 |
2.43 |
0.81 |
4.17 |
|
TONT1 |
2000 |
21.45 |
6.81 |
1.88 |
5.85 |
2.01 |
1.40 |
3.50 |
|
TONT1 |
2001 |
17.69 |
6.00 |
1.80 |
4.07 |
1.69 |
0.91 |
3.22 |
|
TONT1 |
2002 |
19.97 |
6.07 |
1.84 |
4.58 |
1.72 |
1.43 |
4.32 |
|
TONT1 |
2003 |
19.52 |
5.64 |
1.76 | |
