|
Chiricahua National Monument & Wilderness Area
Trends Analysis |
|
| The tables and figures below
show the trends analysis
results for 20% worst, middle 60% and 20% best days at CHIR1 based on
light extinction coefficient
data from 1994 to 2003. No significant trend is observed for aerosol light
extinction coefficients in 20% worst days.
But the nitrate, soil and CM extinction increased significantly, and sulfate
extinction decreased significantly in the worst days. Sulfate extinction
decreased and nitrate and soil extinction increased significantly in the
middle 60% days . Significant decrease trend is found for aerosol
light extinction coefficients in 20% best days, which is caused mainly by
decrease in sulfate and nitrate light extinction. |
|
|
| Table 1. Number of valid
measurements used in the trends analysis |
|
| Site |
Year |
StartDate |
EndDate |
NoMeas |
| CHIR1 |
1994 |
1/1/1994 |
12/24/1994 |
96 |
| CHIR1 |
1995 |
1/11/1995 |
12/9/1995 |
86 |
| CHIR1 |
1996 |
1/10/1996 |
12/28/1996 |
99 |
| CHIR1 |
1997 |
1/1/1997 |
12/31/1997 |
97 |
| CHIR1 |
1998 |
1/3/1998 |
12/30/1998 |
82 |
| CHIR1 |
1999 |
1/2/1999 |
12/29/1999 |
95 |
| CHIR1 |
2000 |
1/1/2000 |
12/29/2000 |
105 |
| CHIR1 |
2001 |
1/1/2001 |
12/24/2001 |
119 |
| CHIR1 |
2002 |
1/2/2002 |
12/31/2002 |
119 |
| CHIR1 |
2003 |
1/3/2003 |
12/29/2003 |
118 |
|
|
| 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) |
| CHIR1 |
1994 |
29.82 |
12.42 |
0.87 |
7.63 |
2.27 |
1.49 |
5.13 |
| CHIR1 |
1995 |
30.12 |
16.11 |
0.88 |
5.43 |
2.26 |
1.12 |
4.33 |
| CHIR1 |
1996 |
27.97 |
12.17 |
1.01 |
5.54 |
1.79 |
1.39 |
6.06 |
| CHIR1 |
1997 |
25.16 |
15.11 |
0.82 |
3.67 |
1.28 |
0.68 |
3.59 |
| CHIR1 |
1998 |
35.65 |
16.80 |
0.81 |
8.84 |
2.36 |
1.25 |
5.59 |
| CHIR1 |
1999 |
26.71 |
10.36 |
1.45 |
5.84 |
1.79 |
1.58 |
5.67 |
| CHIR1 |
2000 |
32.60 |
9.74 |
1.27 |
7.78 |
2.20 |
2.81 |
8.79 |
| CHIR1 |
2001 |
27.87 |
9.65 |
0.98 |
4.59 |
1.22 |
2.57 |
8.87 |
| CHIR1 |
2002 |
33.43 |
9.37 |
2.00 |
8.25 |
1.83 |
2.38 |
9.60 |
| CHIR1 |
2003 |
36.31 |
9.33 |
1.71 |
8.78 |
2.08 |
3.63 |
10.78 |
|
|
|
|
|
|
|
|
|
| Slope (1/Mm/Year) |
|
0.495 |
-0.447 |
0.093 |
0.230 |
-0.021 |
0.265 |
0.682 |
| S-Value |
|
13 |
-31 |
21 |
13 |
-9 |
25 |
33 |
| P-Value |
|
0.146 |
0.002 |
0.036 |
0.146 |
0.242 |
0.014 |
0.001 |
|
 |
|
| 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) |
| CHIR1 |
1994 |
16.71 |
7.63 |
0.79 |
3.09 |
1.24 |
0.77 |
3.18 |
| CHIR1 |
1995 |
15.35 |
6.06 |
0.77 |
2.96 |
1.33 |
0.82 |
3.41 |
| CHIR1 |
1996 |
16.65 |
7.53 |
0.71 |
3.00 |
1.23 |
0.96 |
3.22 |
| CHIR1 |
1997 |
15.75 |
7.80 |
0.75 |
2.63 |
1.18 |
0.71 |
2.68 |
| CHIR1 |
1998 |
17.88 |
7.09 |
0.82 |
4.60 |
1.26 |
0.77 |
3.35 |
| CHIR1 |
1999 |
15.86 |
6.16 |
0.79 |
3.41 |
1.39 |
0.92 |
3.20 |
| CHIR1 |
2000 |
16.39 |
6.53 |
1.13 |
3.12 |
1.28 |
1.00 |
3.33 |
| CHIR1 |
2001 |
13.74 |
5.87 |
0.82 |
2.64 |
1.08 |
0.79 |
2.54 |
| CHIR1 |
2002 |
16.42 |
6.11 |
1.27 |
2.54 |
1.12 |
1.17 |
4.21 |
| CHIR1 |
2003 |
14.47 |
5.67 |
0.92 |
2.53 |
0.99 |
1.15 |
3.21 |
|
|
|
|
|
|
|
|
|
| Slope (1/Mm/Year) |
|
-0.111 |
-0.222 |
0.022 |
-0.062 |
-0.024 |
0.041 |
0.002 |
| S-Value |
|
-11 |
-25 |
25 |
-17 |
-17 |
21 |
1 |
| P-Value |
|
0.190 |
0.014 |
0.014 |
0.078 |
0.078 |
0.036 |
0.500 |
|
 |
|
| Table 4. Trends analysis for
20% best 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) |
| CHIR1 |
1994 |
9.26 |
3.43 |
0.84 |
1.52 |
0.89 |
0.39 |
2.19 |
| CHIR1 |
1995 |
9.47 |
3.52 |
0.86 |
1.90 |
1.09 |
0.40 |
1.71 |
| CHIR1 |
1996 |
8.55 |
3.08 |
0.76 |
1.76 |
0.72 |
0.47 |
1.77 |
| CHIR1 |
1997 |
9.43 |
4.00 |
0.58 |
1.89 |
0.82 |
0.36 |
1.79 |
| CHIR1 |
1998 |
8.77 |
3.39 |
0.73 |
2.28 |
0.93 |
0.22 |
1.22 |
| CHIR1 |
1999 |
8.82 |
2.60 |
0.53 |
2.20 |
0.98 |
0.67 |
1.85 |
| CHIR1 |
2000 |
7.51 |
2.99 |
0.52 |
1.69 |
0.71 |
0.36 |
1.23 |
| CHIR1 |
2001 |
7.13 |
2.61 |
0.62 |
1.61 |
0.82 |
0.25 |
1.23 |
| CHIR1 |
2002 |
8.24 |
2.68 |
0.63 |
1.92 |
0.93 |
0.53 |
1.56 |
| CHIR1 |
2003 |
6.69 |
2.40 |
0.50 |
1.36 |
0.60 |
0.35 |
1.48 |
|
|
|
|
|
|
|
|
|
| Slope (1/Mm/Year) |
|
-0.273 |
-0.119 |
-0.033 |
-0.018 |
-0.022 |
-0.005 |
-0.067 |
| S-Value |
|
-29 |
-27 |
-27 |
-5 |
-13 |
-5 |
-15 |
| P-Value |
|
0.005 |
0.008 |
0.008 |
0.364 |
0.146 |
0.364 |
0.108 |
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