Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21725
Title: Observational study of ozone pollution at a rural site in the Yangtze Delta of China
Authors: Cheung, VTF
Wang, T 
Keywords: Crop damage
Ozone
Photochemical pollution
Trace gases
Zhejiang
Issue Date: 2001
Publisher: Pergamon Press
Source: Atmospheric environment, 2001, v. 35, no. 29, p. 4947-4958 How to cite?
Journal: Atmospheric environment 
Abstract: Ozone and related trace gases (CO, NOx, and SO2) were measured from June 1999 to July 2000 at a rural site in the Yangtze Delta of China, a region of intensive anthropogenic activity. Elevated ozone levels were frequently observed during the study period, with the highest frequency in late spring and early summer. Over a 1yr period, 21d were found to have ozone concentrations exceeding the new US 8-h 80ppb health standard. Calculation of the 'SUM06' exposure index also shows relatively high (>15ppmh) values for each season except winter. At these levels ozone may have adverse effects on human health as well as agricultural crops. Analysis of meteorological data shows that the high ozone days were associated with large-scale stagnation, intense solar radiation, and minimum rainfall. Large-scale back trajectories indicate a slow-moving/re-circulating airmass during the episodic days. Examination of chemical data shows that the observed daytime high ozone concentrations were due to downward mixing of ozone-rich air, in situ photochemical formation, and in some cases, advection to the site of aged plumes. The very high CO levels (and high CO to NOx ratios) were found to coincide with many of the ozone episodes, suggesting a contribution from sources of emission involving incomplete combustion. It is suggested that the burning of biomass (e.g., biofeuls and crop residues) may be an important source for the observed high CO and O3 values.
URI: http://hdl.handle.net/10397/21725
ISSN: 1352-2310
EISSN: 1873-2844
DOI: 10.1016/S1352-2310(01)00351-X
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

91
Last Week
0
Last month
0
Citations as of Oct 7, 2017

WEB OF SCIENCETM
Citations

75
Last Week
0
Last month
Citations as of Oct 16, 2017

Page view(s)

44
Last Week
2
Last month
Checked on Oct 16, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.