Title
Gypsum and other calcium-rich particles above the North Sea Gypsum and other calcium-rich particles above the North Sea
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Easton, Pa ,
Subject
Chemistry
Biology
Engineering sciences. Technology
Source (journal)
Environmental science and technology / American Chemical Society. - Easton, Pa
Volume/pages
30(1996) , p. 1515-1520
ISSN
0013-936X
ISI
A1996UG95400042
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Ca-containing particles, especially CaSO4 particles, have been encountered in several atmospheric aerosol studies. An overview is given of the different sources of airborne Ca-containing particles, The North Sea atmosphere is studied to identify the different Ca-containing particle types and to find the correlation between their occurrence and the source regions of the corresponding air masses. About 50000 individual aerosol samples were collected above the Southern Eight of the North Sea for several wind directions and analyzed for their composition using electron probe X-ray microanalysis. Nonhierarchical cluster analysis is performed on the data to reveal the different particle types, their relative abundances and their sources. CaSO4 in most cases constitutes the largest fraction of the Ca-containing particles. Extremely high numbers of CaSO4 particles are found for northeastern winds, coming from the central part of Germany, suggesting that a great fraction is derived from anthropogenic sources located in this region. Among the other Ca-containing particle types are the aluminosilicates, CaCO3, Fe-Ca-rich particles, and CaSO4 or CaCO3 in combination with NaCl.
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