|
Jarbidge Wilderness Area
Trends Analysis |
|
| The tables and figures below
show the trends analysis
results for 20% worst, middle 60% and 20% best days at JARB1 based on
light extinction coefficient
data from 1994 to 2003. Overall, there is no significant trend in
aerosol light extinction in 20% worst days. Nitrate extinctions
increased significantly, while LAC extinctions decreased significantly in the
worst days. Aerosol light extinction coefficients decreased significantly in
20% best days. |
|
|
| Table 1. Number of valid
measurements used in the trends analysis |
|
|
Site |
Year |
StartDate |
EndDate |
NoMeas |
|
JARB1 |
1994 |
1/1/1994 |
12/31/1994 |
88 |
|
JARB1 |
1995 |
1/4/1995 |
12/23/1995 |
92 |
|
JARB1 |
1996 |
1/3/1996 |
10/12/1996 |
80 |
|
JARB1 |
1997 |
4/30/1997 |
12/27/1997 |
60 |
|
JARB1 |
1998 |
1/3/1998 |
12/30/1998 |
90 |
|
JARB1 |
1999 |
1/6/1999 |
12/29/1999 |
93 |
|
JARB1 |
2000 |
1/1/2000 |
12/29/2000 |
69 |
|
JARB1 |
2001 |
1/1/2001 |
12/30/2001 |
104 |
|
JARB1 |
2002 |
1/2/2002 |
12/31/2002 |
83 |
|
JARB1 |
2003 |
1/3/2003 |
12/29/2003 |
106 |
|
|
| 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) |
|
JARB1 |
1994 |
30.39 |
4.02 |
0.56 |
14.76 |
2.61 |
2.38 |
6.07 |
|
JARB1 |
1995 |
20.72 |
4.12 |
0.56 |
7.25 |
1.89 |
1.47 |
5.43 |
|
JARB1 |
1996 |
31.53 |
4.48 |
0.91 |
12.51 |
3.08 |
2.72 |
7.82 |
|
JARB1 |
1997 |
22.97 |
4.59 |
0.77 |
7.21 |
3.44 |
1.13 |
5.84 |
|
JARB1 |
1998 |
24.67 |
4.07 |
0.68 |
8.09 |
1.76 |
2.67 |
7.40 |
|
JARB1 |
1999 |
28.21 |
4.43 |
1.14 |
11.61 |
2.97 |
2.45 |
5.60 |
|
JARB1 |
2000 |
25.24 |
4.62 |
1.00 |
10.68 |
2.44 |
1.82 |
4.68 |
|
JARB1 |
2001 |
26.82 |
4.71 |
1.08 |
9.19 |
2.33 |
2.85 |
6.66 |
|
JARB1 |
2002 |
25.08 |
3.65 |
2.31 |
10.32 |
1.68 |
3.03 |
4.09 |
|
JARB1 |
2003 |
24.43 |
4.57 |
0.80 |
9.19 |
1.61 |
1.92 |
6.34 |
|
|
|
|
|
|
|
|
|
|
|
Slope (1/Mm/Year) |
|
-0.270 |
0.046 |
0.077 |
-0.300 |
-0.112 |
0.063 |
-0.157 |
|
S-Value |
|
-5 |
13 |
25 |
-7 |
-21 |
11 |
-9 |
|
P-Value |
|
0.364 |
0.146 |
0.014 |
0.300 |
0.036 |
0.190 |
0.242 |
|
 |
|
| 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) |
|
JARB1 |
1994 |
12.07 |
3.26 |
0.70 |
3.21 |
0.78 |
1.01 |
3.11 |
|
JARB1 |
1995 |
9.56 |
2.76 |
0.70 |
2.73 |
0.95 |
0.54 |
1.89 |
|
JARB1 |
1996 |
12.40 |
3.16 |
0.65 |
3.87 |
1.01 |
0.82 |
2.89 |
|
JARB1 |
1997 |
12.31 |
2.78 |
0.45 |
3.81 |
0.75 |
0.75 |
3.77 |
|
JARB1 |
1998 |
11.09 |
3.56 |
0.74 |
3.09 |
0.99 |
0.51 |
2.20 |
|
JARB1 |
1999 |
11.20 |
2.87 |
0.67 |
2.88 |
0.88 |
0.91 |
2.99 |
|
JARB1 |
2000 |
8.02 |
2.60 |
0.62 |
2.58 |
0.81 |
0.36 |
1.06 |
|
JARB1 |
2001 |
10.16 |
3.53 |
0.99 |
2.56 |
0.74 |
0.61 |
1.74 |
|
JARB1 |
2002 |
9.25 |
2.72 |
0.69 |
2.67 |
0.72 |
0.65 |
1.78 |
|
JARB1 |
2003 |
10.32 |
2.64 |
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