258
A. Robichaud et al.
Table 40.1 Results from sensitivity tests for OA (range corresponds to different seasons)
Species
Corr.
length
(km)
Variance
ratio
N
Xhi 2
Obs.
error
(%)
Observation data
methods
O 3
70–200
1–5
837–1473 0.986–1.50
5.0
UV absorption
SO 2
55–150
2–6
521–543
1.19–1.38
16.5
Filter pack
NO 2
60–73
3–21
465–484
1.005–1.53
10.0
Chemiluminescence
NO
20–100
3–15
410–464
0.92–1.82
10.0
Chemiluminescence
HNO 3
150–200
2–13.5
89–94
1.096–1.37
6.0
Filter pack
NH 3
30–320
2–25
18–20
0.164–1.02
10.0
Passive sampler
p-NO 3
~200
~20
89–95
0.592–0.92
5.5
Filter pack
p-NH 4
155–200
~20
89–95
0.81–0.92
4.0
Filter pack
p-SO 4
155–200
2–20
89–94
0.56–0.91
7.0
Filter pack
w-NO 3
200
1–3
225–244
1.04–1.41
5.0
Wet collector
w-NH 4
190–200
2–20
225–248
0.821–
1.093
2.0
Wet collector
w-SO 4
80–200
1–3
216–248
0.797–1.00
5.0
Wet collector
Fig. 40.3 Comparison between ADAGIO total nitrogen deposition for 2010 with US/TDEP initiative