The Parameters Estimation for a PM2.5 Transport Model with the Adjoint Method
Table 3
Error statistics of practical experiments before and after assimilation.
Experiment
(µg/m3)
(µg/m3)
(µg/m3)
Before
After
Before
After
Before
After
PE1
0.12434
41.26
12.31
41.85
17.38
40.50
15.22
PE2
0.13007
41.26
12.63
41.85
17.79
40.50
40.50
PE3
0.38750
41.26
24.54
41.85
21.52
40.50
18.94
PE4
0.15637
41.26
14.13
41.85
18.04
40.50
36.35
PE5
0.14755
41.26
13.62
41.85
17.29
40.50
18.44
PE6
0.08964
41.26
10.42
41.85
18.21
40.50
13.56
PE7
0.10516
41.26
11.33
41.85
19.36
40.50
40.50
PE8
0.36593
41.26
23.20
41.85
23.27
40.50
14.78
PE9
0.15294
41.26
14.12
41.85
20.09
40.50
24.42
PE10
0.13889
41.26
13.24
41.85
18.11
40.50
14.95
is the final value of cost function and is the initial value of cost function. and are the MAEs between simulated values and observations in “assimilated cities” and “checked cities,” respectively. is the MAEs between the observations and simulated results in all the cities at the initial time.