کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6342621 | 1620421 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of continental outflow on aerosol chemical characteristics over the Arabian Sea during winter Influence of continental outflow on aerosol chemical characteristics over the Arabian Sea during winter](/preview/png/6342621.png)
The chemical composition of aerosol over the Arabian Sea was investigated during December 2007. Elemental Carbon (EC), Organic Carbon (OC), water soluble organic and inorganic constituents and crustal elements (Al, Fe, Ca, and Mg) were measured in total suspended particulate samples (TSP) collected from marine boundary layer of the Arabian Sea when the oceanic region is influenced by continental outflow. Anthropogenic and natural mineral aerosol originating from continental regions dominates the aerosol composition contributing â¼88% of total aerosol mass. The sea-salt aerosol comprises only â¼12% of TSP. The carbonaceous aerosol exhibits spatial trend similar to that of K+ suggesting major source could be biomass burning. Secondary organic aerosol (SOA) contribution estimated by EC-tracer method suggests that up to 67% of OC can be of secondary origin. Average water soluble organic carbon to OC ratio is â¼0.9, indicates significant formation of SOA during transport of continental air masses. These results demonstrate the dominance of continental aerosol over the Arabian Sea during wintertime where deposition may have major impact on surface ocean biogeochemistry.
⺠Aerosol characteristics were studied over Arabian Sea during continental outflow. ⺠Continental aerosol dominates total measured aerosol mass (â¼88%). ⺠The sea-salt aerosol comprises only â¼12%. ⺠Secondary organic carbon estimated up to 67% of total organic carbon.
Journal: Atmospheric Environment - Volume 50, April 2012, Pages 182-191