Response of fine particles to the reduction of precursor emissions in Yangtze River Delta (YRD), China Juan Li 1 , Joshua S. Fu 1 , Yang Gao 1 , Yun-Fat Lam 1 Guoshun Zhuang 2 , Kan Huang 1,2 , Ying Zhou 3 1. The University of Tennessee, Knoxville, U.S.A. 2. Fudan University, China 3. Emory University, U.S.A. 9 9 th th Annual CMAS Conference, October 11-13, 2010 Chapel Annual CMAS Conference, October 11-13, 2010 Chapel Hill, NC Hill, NC
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9 th Annual CMAS Conference , Octo ber 11-13 , 20 10 Chapel Hill, NC
Response of fine particles to the reduction of precursor emissions in Yangtze River Delta (YRD), China. Juan Li 1 , Joshua S. Fu 1 , Yang Gao 1 , Yun-Fat Lam 1 Guoshun Zhuang 2 , Kan Huang 1,2 , Ying Zhou 3 1. The University of Tennessee, Knoxville, U.S.A. 2. Fudan University, China - PowerPoint PPT Presentation
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Response of fine particles to the reduction of precursor emissions in Yangtze River Delta
(YRD), China
Juan Li1, Joshua S. Fu1, Yang Gao1, Yun-Fat Lam1 Guoshun Zhuang2, Kan
• NMB—the normalized mean bias; NME—the normalized mean error;
Variable Data # Mean Obs. Mean Simulation NMB NME
SO2 (ppb) 365 45.13 50.14 11.1% 42.7%
NO2 (ppb) 365 35.91 42.22 17.6% 37.5%
O3 (ppb) 166 30.55 27.15 -11.1% 37.2%
NH4 (μg/m3) 99 2.83 3.52 24.5% 71%
NO3 (μg/m3) 99 2.21 1.87 -15.7% 77.8%
PM10 (μg/m3) 365 66.62 71.13 6.8% 40.7%
Sensitivity StudyResponse of PM2.5 to 20% reduction of NOx and VOC, respectively
-1.5
-1
-0.5
0
0.5
1
01/0
1/06
02/0
1/06
03/0
1/06
04/0
1/06
05/0
1/06
06/0
1/06
07/0
1/06
08/0
1/06
09/0
1/06
10/0
1/06
11/0
1/06
12/0
1/06
PM
2.5
(μ
g/m
3 )
Reduction in 20%NOx Reduction in 20% VOC
-0.12
-0.08
-0.04
0
0.04
Spring Summer Fall Winter
PM
2.5 (
μg m
-3)
Response of NH4+, NO3
- to the reduction in 20% NOx and 20% VOC emission
NH4+NH4
+ NO3-NO3
-
-0.09
-0.07
-0.05
-0.03
-0.01
0.01
0.03
Sen 1 Sen 2
Con
c. (
μg/
m3 )
Spring Summer Fall Winter
Reduction in 20%VOC Reduction in 20%NOx
Correlation between PAN and NH4+, NO3
-
PAN were well correlated with NH4+and NO3
-; the slopes in four seasons were in the order of
winter>fall>spring>summer, which was coincident with the seasonal variation of temperature, indicating that lower temperature is in favor of the formation of PAN, Peroxyacetyl nitrate (PAN) may play a key role in the formation of NO3
- and NH4+ in response to the reduction of NOx emission.