|
Weminuche Wilderness Area Trends Analysis |
|
| The tables and figures below
show the trends analysis
results for 20% worst, middle 60% and 20% best days at WEMI1 based on
light extinction coefficient
data from 1994 to 2003. No significant trend is found for total aerosol
light extinction in 20% worst days. But a significant decrease trend in
sulfate light extinction coefficients and a significant increase in nitrate
extinction coefficients are found in 20% worst days.
Significant decrease in total aerosol light extinction coefficients are
found in both middle 60% and 20% best days. |
|
|
| Table 1. Number of valid
measurements used in the trends analysis |
|
|
Site |
Year |
StartDate |
EndDate |
NoMeas |
|
WEMI1 |
1994 |
1/1/1994 |
12/31/1994 |
94 |
|
WEMI1 |
1995 |
1/4/1995 |
12/30/1995 |
97 |
|
WEMI1 |
1996 |
1/17/1996 |
12/28/1996 |
83 |
|
WEMI1 |
1997 |
1/1/1997 |
12/31/1997 |
96 |
|
WEMI1 |
1998 |
1/3/1998 |
12/26/1998 |
95 |
|
WEMI1 |
1999 |
1/6/1999 |
12/29/1999 |
94 |
|
WEMI1 |
2000 |
1/1/2000 |
12/29/2000 |
83 |
|
WEMI1 |
2001 |
1/1/2001 |
12/30/2001 |
121 |
|
WEMI1 |
2002 |
1/11/2002 |
12/28/2002 |
110 |
|
WEMI1 |
2003 |
1/9/2003 |
12/29/2003 |
116 |
|
|
| 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) |
|
WEMI1 |
1994 |
19.95 |
7.88 |
0.59 |
5.08 |
2.14 |
0.89 |
3.38 |
|
WEMI1 |
1995 |
19.87 |
8.28 |
0.62 |
4.89 |
2.67 |
0.78 |
2.63 |
|
WEMI1 |
1996 |
20.93 |
7.39 |
0.76 |
6.57 |
2.94 |
0.80 |
2.46 |
|
WEMI1 |
1997 |
19.88 |
8.54 |
0.85 |
4.05 |
2.02 |
0.79 |
3.63 |
|
WEMI1 |
1998 |
22.40 |
9.39 |
0.93 |
5.80 |
2.50 |
0.76 |
3.03 |
|
WEMI1 |
1999 |
20.60 |
6.75 |
1.02 |
5.99 |
2.36 |
1.00 |
3.48 |
|
WEMI1 |
2000 |
21.08 |
6.58 |
1.27 |
7.21 |
2.95 |
0.69 |
2.39 |
|
WEMI1 |
2001 |
18.23 |
7.23 |
1.06 |
4.56 |
2.03 |
1.25 |
2.11 |
|
WEMI1 |
2002 |
30.28 |
5.16 |
1.68 |
14.79 |
3.04 |
1.68 |
3.93 |
|
WEMI1 |
2003 |
25.56 |
5.71 |
1.90 |
10.65 |
2.33 |
1.44 |
3.53 |
|
|
|
|
|
|
|
|
|
|
|
Slope (1/Mm/Year) |
|
0.489 |
-0.260 |
0.128 |
0.583 |
0.016 |
0.077 |
0.017 |
|
S-Value |
|
17 |
-23 |
43 |
19 |
5 |
15 |
3 |
|
P-Value |
|
0.078 |
0.023 |
0.000 |
0.054 |
0.364 |
0.108 |
0.431 |
|
 |
|
| 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) |
|
WEMI1 |
1994 |
13.59 |
4.80 |
0.64 |
2.81 |
1.66 |
0.62 |
3.07 |
|
WEMI1 |
1995 |
11.14 |
4.16 |
0.63 |
2.27 |
1.64 |
0.56 |
1.87 |
|
WEMI1 |
1996 |
11.14 |
3.75 |
0.55 |
2.92 |
1.43 |
0.64 |
1.85 |
|
WEMI1 |
1997 |
12.38 |
4.86 |
0.59 |
2.72 |
1.53 |
0.40 |
2.28 |
|
WEMI1 |
1998 |
12.26 |
4.62 |
0.72 |
3.08 |
1.54 |
0.50 |
1.79 |
|
WEMI1 |
1999 |
11.29 |
3.93 |
0.59 |
2.92 |
1.60 |
0.50 |
1.74 |
|
WEMI1 |
2000 |
11.56 |
4.52 |
0.74 |
3.04 |
1.74 |
0.35 |
1.17 |
|
WEMI1 |
2001 |
10.99 |
4.51 |
0.76 |
2.47 |
1.49 |
0.48 |
1.27 |
|
WEMI1 |
2002 |
11.09 |
3.60 |
1.07 |
2.81 |
1.34 |
0.60 |
1.68 |
|
WEMI1 |
2003 |
10.89 |
3.37 |
|
