Atmospheric concentrations and size distributions of aircraft-sampled Cd,Cu, Pb and Zn over the southern bight of the North Sea |
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| Institution: | 1. Department of Chemistry, University of Antwerp (UIA), B-2610 Wilrijk-Antwerpen, Belgium;2. Tidal Waters Division, Rijkswaterstaat, P.O. Box 20907, NL-2500 EX, The Hague, the Netherlands;3. Institute for Nuclear Sciences, Ghent State University, Proeftuinstraat 86, B-9000 Gent, Belgium;1. Senior Research Fellow. Mr., CSIR-National Institute of Oceanography, Goa, India;2. Senior Principal Scientist. Dr., CSIR-National Institute of Oceanography, Goa, India;3. Project Assistant. Mr., CSIR-National Institute of Oceanography, Goa, India;4. Senior Research Fellow. Mr., CSIR-National Institute of Oceanography, Goa, India;5. Senior Research Fellow. Mr., CSIR-National Institute of Oceanography, Goa, India;1. Centre for Climate Change Research, Indian Institute of Tropical Meteorology, Pune, India;2. Department of Atmospheric and Space Science, Savitribai Phule Pune University, Pune, India;3. Cotton University, Guwahati, India;4. Department of Ocean Studies and Marine Biology, Pondicherry University, Port Blair, Andaman and Nicobar Islands, India;5. Department of Botany, University of Calcutta, Kolkata, India;6. Department of Environmental Science, Tezpur Central University, Tezpur, India;1. Department of Geology, Yogi Vemana University, Kadapa, Andhra Pradesh, India;2. Department of Geology, Sri Venkateswara University, Tirupati, Andhra Pradesh, India;3. Department of Earth Sciences, Yogi Vemana University, Kadapa, Andhra Pradesh, India |
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| Abstract: | In an effort to assess the atmospheric input of heavy metals to the Southern Bight of the North Sea, aircraft-based aerosol samplings in the lower troposphere were performed between September 1988 and October 1989. Total atmospheric particulate and size-differentiated concentrations of Cd, Cu, Pb and Zn were determined as a function of altitude, wind direction, air-mass history and season. The obtained data are compared with results of ship-based measurements carried out previously and with literature values of Cu, Pb and Zn, for the marine troposphere of the southern North Sea. The results point out the high variability of the concentrations with the meterological conditions, as well as with time and location. The experimentally found particle size distribution are bimodal with a significant difference in fractions of small and large particles. These large aerosol particles have a direct and essential impact on the air-to-sea transfer of anthropogenic trace metals, in spite of their low numerical abundance and relatively low heavy metal content. |
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