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The Impact of Nonlocal Ammonia on Submicron Particulate Matter and Visibility Degradation in Urban Shanghai
Joint Authors
Jansen, Roeland Cornelis
Chen, Jianmin
Hu, Yunjie
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-05
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
To study the role of submicron particulate matter on visibility degradation in Shanghai, mass concentrations of PM1, secondary inorganic aerosol (SIA) in PM1, and SIA precursor gasses were on-line monitored during a 4-week intensive campaign in December 2012.
During the campaign, 8 haze periods were identified when on average PM1 mass increased to 62.1 ± 25.6 μg/m3 compared to 30.7 ± 17.1 μg/m3 during clear weather periods.
The sum of SIA in PM1 increased in mass concentration during the haze from 14.9 ± 7.4 μg/m3 during clear periods to 29.7 ± 10.7 μg/m3 during the haze periods.
Correlation coefficients (R2) of the visibility as function of mass concentrations of SIA species in PM1 show negative exponential relations implying the importance of the SIA species in visibility reduction.
The important role of ammonia in SIA formation is recognized and demonstrated.
Generally, ammonium neutralizes sulfate and nitrate and the molar equivalent ratio of ammonium versus the sum of sulfate and nitrate increases during the haze episodes.
Air mass backward trajectories introducing the haze periods show the impact of nonlocal ammonia on visibility degradation in Shanghai.
American Psychological Association (APA)
Jansen, Roeland Cornelis& Chen, Jianmin& Hu, Yunjie. 2014. The Impact of Nonlocal Ammonia on Submicron Particulate Matter and Visibility Degradation in Urban Shanghai. Advances in Meteorology،Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-479381
Modern Language Association (MLA)
Jansen, Roeland Cornelis…[et al.]. The Impact of Nonlocal Ammonia on Submicron Particulate Matter and Visibility Degradation in Urban Shanghai. Advances in Meteorology No. 2014 (2014), pp.1-12.
https://search.emarefa.net/detail/BIM-479381
American Medical Association (AMA)
Jansen, Roeland Cornelis& Chen, Jianmin& Hu, Yunjie. The Impact of Nonlocal Ammonia on Submicron Particulate Matter and Visibility Degradation in Urban Shanghai. Advances in Meteorology. 2014. Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-479381
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-479381