Characterisation of local and external contributions of atmospheric particulate matter at a background coastal site |
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| Institution: | 1. Applied Physics & Ballistics Department, Fakir Mohan University, Balasore 756 019, India;2. CFFS/CMS, University of Kentucky, Lexington, KY 40506, USA;1. Korea Institute of Atmospheric Prediction Systems, Seoul, South Korea;2. School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea;3. Pacific Northwest National Laboratory, Richland, WA, United States;4. Department of Atmospheric Science, Yonsei University, Seoul, South Korea;1. Department of Aquatic Bioscience, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 164-8657, Japan;2. Faculty of Fisheries, Nagasaki University, 1-14 Bunkyo-cho, Nagasaki, Nagasaki, 852-8521, Japan;3. Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8564, Japan |
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| Abstract: | This study applies a methodology for discriminating local and external contributions of atmospheric particulate matter (PM) at a rural background station in the North-western coast of Spain. The main inputs at the nearest scale have come from soil dust, marine aerosol and road traffic. At a larger scale, the highest contributions have come from fossil-fuel combustion sources, giving rise to relatively high ammonium sulphate background levels, mainly in summer. External contributions from long-range transport processes of African dust and nitrate have been detected. Morocco and Western Sahara have been identified as the main potential source regions of African dust, with a higher content of Al and Ti than other crustal components. Geographical areas from central and Eastern Europe have been identified as potential sources of particulate nitrate. The discrimination of the PM contribution from natural and anthropogenic sources at different geographical scales is a necessary information for establishing PM reduction strategies in specific areas. |
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