(BRAVO) Study: Final Report. - Desert Research Institute

Final Report — September 2004
sulfur is similarly high for May through October. Fine soil and coarse mass are lowest in
winter, with higher values in the spring and in mid summer. Much of the July soil and coarse
mass is believed to result from transport of African dust transported across the Atlantic
Ocean (Perry et al., 1997; Ashbaugh et al., 2001; Gebhart et al., 2001).
Extinction (Mm -1 )
110
100
90
80
70
60
50
40
30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rayleigh Sulfate Nitrate Organics LAC Soil Coarse Mass
1998
Extinction (Mm -1 )
110
100
90
80
70
60
50
40
30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rayleigh Sulfate Nitrate Organics LAC Soil Coarse Mass
1999
110
100
90
80
110
100
90
80
Extinction (Mm -1 )
70
60
50
40
Extinction (Mm -1 )
70
60
50
40
30
30
20
20
10
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rayleigh Sulfate Nitrate Organics LAC Soil Coarse Mass
Rayleigh Sulfate Nitrate Organics LAC Soil Coarse Mass
2000
2001
110
100
90
80
Extinction (Mm -1 )
70
60
50
40
30
20
10
Figure 2-5. Big Bend extinction budget time
plots of individual years. These time plots were
smoothed using 15-day moving averages.
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Rayleigh Sulfate Nitrate Organics LAC Soil Coarse Mass
2002
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