Show simple item record

AuthorYigiterhan, Oguz
AuthorMohd Al-Ansari, Ebrahim
AuthorNelson, Alex
AuthorAlaa Abdel-Moati, Mohamed
AuthorTurner, Jesse
AuthorAbdulla Alsaadi, Hamood
AuthorPaul, Barbara
AuthorAbdullatif Al-Maslamani, Ibrahim
AuthorAbdulla Al-Ansi Al-Yafei, Mehsin
AuthorW. Murray, James
Available date2020-02-06T04:52:09Z
Publication Date2020-01-27
Publication NameBiogeosciences
Identifierhttp://dx.doi.org/10.5194/bg-17-381-2020
CitationO. Yigiterhan et al.: Trace element composition of size-fractionated suspended particulate matter samples, Biogeosciences, 17, 381–404, 2020.
URIhttp://hdl.handle.net/10576/12845
AbstractWe analyzed net-tow samples of natural assemblages of plankton, and associated particulate matter, from the Exclusive Economic Zone (EEZ) of Qatar in the Arabian Gulf. Size-fractionated suspended particles were collected using net tows with mesh sizes of 50 and 200 μm to examine the composition of small- and large-size plankton populations. Samples were collected in two different years (11 offshore sites in October 2012 and 6 nearshore sites in April 2014) to examine temporal and spatial variabilities.We calculated the excess metal concentrations by correcting the bulk composition for inputs from atmospheric dust using aluminum (Al) as a lithogenic tracer and the metal=Al ratios for average Qatari dust. Atmospheric dust in Qatar is depleted in Al and enriched in calcium (Ca), in the form of calcium carbonate (CaCO3), relative to the global average Upper Continental Crust (UCC). To evaluate the fate of this carbonate fraction when dust particles enter seawater, we leached a subset of dust samples using an acetic acid–hydroxylamine hydrochloride (HAc–HyHCl) procedure that should solubilize CaCO3 minerals and associated elements. As expected, we found that Ca was removed in Qatari dust; however, the concentrations (ppm) for most elements actually increased after leaching because the reduction in sample mass resulting from the removal of CaCO3 by the leach was more important than the loss of metals solubilized by the leach. Because
SponsorQatar National Research Fund (QNRF) under the National Priorities Research Program
Languageen
PublisherCopernicus Publications
SubjectExclusive Economic Zone (EEZ) of Qatar
Arabian Gulf
Trace element
atmospheric dust
TitleTrace element composition of size-fractionated suspended particulate matter samples from the Qatari Exclusive Economic Zone of the Arabian Gulf: the role of atmospheric dust
TypeArticle
Pagination381–404
Volume Number17
dc.accessType Open Access


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record