|
Bandelier National Monument
Trends Analysis |
|
| The tables and figures below
show the trends analysis
results for 20% worst, middle 60% and 20% best days at BAND1 based on
light extinction coefficient
data from 1994 to 2003. Overall, there is no significant trend in aerosol
light extinction in 20% worst days. But a peak is observed in 2000 caused by
big OC and EC concentrations, which is primarily due to smoke from the
Cerro Grande forest
fire. There is a statistically significant increase in nitrate
extinction in both middle 60% and 20% worst days. Significant decrease trend
is found for aerosol light extinction coefficients in 20% best days, which
is caused mainly by decrease in sulfate and CM light extinction. Sulfate
extinction also significantly decreased in the middle 60% days. |
|
|
| Table 1. Number of valid
measurements used in the trends analysis |
| Site |
Year |
StartDate |
EndDate |
NoMeas |
| BAND1 |
1994 |
1/1/1994 |
12/31/1994 |
88 |
| BAND1 |
1995 |
1/4/1995 |
12/30/1995 |
88 |
| BAND1 |
1996 |
1/3/1996 |
12/28/1996 |
93 |
| BAND1 |
1997 |
1/1/1997 |
12/31/1997 |
100 |
| BAND1 |
1998 |
1/3/1998 |
12/30/1998 |
99 |
| BAND1 |
1999 |
1/2/1999 |
12/29/1999 |
100 |
| BAND1 |
2000 |
1/1/2000 |
12/29/2000 |
94 |
| BAND1 |
2001 |
1/1/2001 |
12/30/2001 |
119 |
| BAND1 |
2002 |
1/2/2002 |
12/31/2002 |
110 |
| BAND1 |
2003 |
1/3/2003 |
12/29/2003 |
99 |
|
|
| 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) |
| BAND1 |
1994 |
24.50 |
9.81 |
1.12 |
6.40 |
2.04 |
1.29 |
3.84 |
| BAND1 |
1995 |
26.01 |
11.17 |
1.18 |
6.88 |
2.53 |
1.06 |
3.19 |
| BAND1 |
1996 |
25.04 |
7.64 |
0.97 |
7.72 |
2.29 |
1.26 |
5.16 |
| BAND1 |
1997 |
26.69 |
10.26 |
2.60 |
6.45 |
2.22 |
0.70 |
4.46 |
| BAND1 |
1998 |
31.98 |
11.81 |
2.26 |
10.02 |
3.11 |
0.76 |
4.01 |
| BAND1 |
1999 |
25.74 |
9.51 |
1.55 |
7.07 |
2.58 |
1.17 |
3.86 |
| BAND1 |
2000 |
47.11 |
8.77 |
3.14 |
24.54 |
7.32 |
0.89 |
2.45 |
| BAND1 |
2001 |
22.27 |
8.91 |
2.40 |
5.24 |
2.04 |
1.15 |
2.53 |
| BAND1 |
2002 |
28.89 |
9.05 |
2.80 |
9.29 |
2.63 |
1.49 |
3.62 |
| BAND1 |
2003 |
31.64 |
8.00 |
3.32 |
12.43 |
3.18 |
1.07 |
3.64 |
|
|
|
|
|
|
|
|
|
| Slope (1/Mm/Year) |
|
0.641 |
-0.256 |
0.231 |
0.483 |
0.082 |
0.001 |
-0.111 |
| S-Value |
|
15 |
-15 |
29 |
17 |
19 |
1 |
-13 |
| P-Value |
|
0.108 |
0.108 |
0.005 |
0.078 |
0.054 |
0.500 |
0.146 |
|
 |
|
| 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) |
| BAND1 |
1994 |
15.47 |
6.09 |
1.15 |
3.95 |
1.53 |
0.51 |
2.24 |
| BAND1 |
1995 |
14.39 |
5.54 |
1.20 |
3.45 |
1.65 |
0.50 |
2.06 |
| BAND1 |
1996 |
15.30 |
5.68 |
0.94 |
3.97 |
1.67 |
0.62 |
2.42 |
| BAND1 |
1997 |
15.34 |
6.38 |
1.04 |
3.71 |
1.44 |
0.49 |
2.28 |
| BAND1 |
1998 |
17.27 |
6.35 |
1.11 |
4.76 |
1.82 |
0.55 |
2.68 |
| BAND1 |
1999 |
15.33 |
5.02 |
1.05 |
4.51 |
1.77 |
0.63 |
2.34 |
| BAND1 |
2000 |
15.63 |
5.61 |
1.56 |
4.80 |
1.71 |
0.42 |
1.53 |
| BAND1 |
2001 |
13.93 |
5.34 |
1.48 |
3.24 |
1.23 |
0.68 |
1.96 |
| BAND1 |
2002 |
14.85 |
5.11 |
1.68 |
3.96 |
1.62 |
0.71 |
1.77 |
| BAND1 |
2003 |
14.67 |
4.99 |
1.21 |
4.49 |
1.40 |
0.62 |
1.95 |
|
|
|
|
|
|
|
|
|
| Slope (1/Mm/Year) |
|
-0.077 |
-0.114 |
0.047 |
0.060 |
-0.014 |
0.017 |
-0.056 |
| S-Value |
|
-9 |
-23 |
19 |
9 |
-7 |
17 |
-15 |
| P-Value |
|
0.242 |
0.023 |
0.054 |
0.242 |
0.300 |
0.078 |
0.108 |
|
|
 |
|
| 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) |
| BAND1 |
1994 |
10.01 |
3.41 |
1.19 |
2.40 |
1.05 |
0.34 |
1.63 |
| BAND1 |
1995 |
8.51 |
2.53 |
1.16 |
2.08 |
1.02 |
0.33 |
1.38 |
| BAND1 |
1996 |
8.68 |
3.13 |
0.92 |
1.87 |
1.06 |
0.36 |
1.34 |
| BAND1 |
1997 |
8.51 |
3.06 |
0.53 |
2.21 |
1.01 |
0.23 |
1.47 |
| BAND1 |
1998 |
10.12 |
3.02 |
0.79 |
2.76 |
1.42 |
0.35 |
1.78 |
| BAND1 |
1999 |
9.43 |
2.74 |
0.54 |
2.66 |
1.30 |
0.38 |
1.81 |
| BAND1 |
2000 |
8.02 |
2.80 |
0.87 |
2.11 |
0.97 |
0.28 |
0.99 |
| BAND1 |
2001 |
8.05 |
3.18 |
0.66 |
1.92 |
0.88 |
0.37 |
1.03 |
| BAND1 |
2002 |
8.32 |
2.61 |
1.07 |
2.24 |
1.02 |
0.37 |
1.02 |
| BAND1 |
2003 |
7.97 |
2.45 |
0.86 |
2.53 |
1.06 |
0.22 |
0.85 |
|
|
|
|
|
|
|
|
|
| Slope (1/Mm/Year) |
|
-0.115 |
-0.088 |
-0.026 |
0.011 |
-0.004 |
0.002 |
-0.071 |
| S-Value |
|
-21 |
-19 |
-11 |
5 |
-5 |
1 |
-19 |
| P-Value |
|
0.036 |
0.054 |
0.190 |
0.364 |
0.364 |
0.500 |
0.054 |
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