The distribution and origin of pahs over the asian marginal seas, the indian, and the pacific oceans: Implications for outflows from Asia and Africa
Journal of Geophysical Research, ISSN: 2156-2202, Vol: 119, Issue: 4, Page: 1949-1961
2014
- 22Citations
- 19Captures
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Article Description
Aerosol samples were collected aboard the R/V Dayang Yihao from 8 January to 7 August 2007 to investigate the geographical distribution of polycyclic aromatic hydrocarbons (PAHs) over oceans and to assess their continental origins. The highest concentrations were found over the marginal seas in Asia, especially the East and South China Seas, indicating that China is a top source of emissions into the marine atmosphere in the areas monitored on this cruise. PAH concentrations over the west oceanic region in the South Indian Ocean were noticeably higher than in other areas of the Indian Ocean, most likely because air masses from Africa, the Arabian Sea, and the Bay of Bengal exert a negative impact on those regions through long-range atmospheric transport. The PAH isomer ratio values varied over the oceans that were impacted by continental sources but remained relatively uniform over most of the remote oceans. Using diagnostic ratio analysis, we found PAHs emitted from China were mainly associated with biomass/coal burning. The measurements of levoglucosan were consistent with the results mentioned above. The western part of the South Indian Ocean atmosphere was likely affected by wildfire emissions from Africa, while the northern part was by petroleum combustion, biofuel, and wildfire burning, because the winter monsoon most likely carries aerosol from the Arabian Peninsula and India across the equator. Using the monthly images of fire activity and aerosol optical depth, it can be confirmed biomass burning from Africa can significantly influence the aerosol over the Indian Ocean.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84896989956&origin=inward; http://dx.doi.org/10.1002/2013jd020361; http://doi.wiley.com/10.1002/2013JD020361; http://onlinelibrary.wiley.com/wol1/doi/10.1002/2013JD020361/fullpdf; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2013JD020361; https://dx.doi.org/10.1002/2013jd020361; https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JD020361
American Geophysical Union (AGU)
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