Elemental tracers for saharan dust

Çetin, Kocakaya Banu
The impact of Saharan dust on the ecology in the Mediterranean region had been extensively discussed in the literature. However, in most studies in this field, dusts collected on aerosol filters are assumed to have Saharan origin. Although this assumption is correct during Saharan dust episodes, dust locally produced at the arid eastern Mediterranean basin should be the main soil component in the atmosphere during most of the year. In this study, concentrations of elements and ions measured in aerosol samples collected in 1992-1993 and 1998 in Antalya station were investigated in order to understand the source regions of aerosols and potential elemental tracers, which can be used to differentiate between Saharan and local dust components at the Eastern Mediterranean region. Collected and measured samples were statistically examined for 41 elements and ions. In addition to elemental tracers, potential for soluble-to-insoluble P ratio as a tracer was also investigated. mProbable source regions at North Africa from where dust impacting Eastern Mediterranean originates by trajectory statistics. Backtrajectories, which are essential in such study, were calculated using a three-dimensional isentropic trajectory model. Monthly distribution of Saharan dust events shows that Saharan dust events mostly occurs in spring and fall and rarely observed in winter probably due to scavenging of dust particles by frequent rain events in winter. Based on the backtrajectory analysis, enrichment factor calculations and results of multivariate statistical techniques, Cr, Ni, Ca, Mg, Cs, K, Co, Rb and Nd are identified as potential tracer, to differentiate Saharan and local soil in the eastern Mediterranean atmosphere.


Chemical concentrations and elements size distributions of aerosols in the eastern Mediterranean during strong dust storms
Gullu, GH; Olmez, I; Tuncel, G (1995-10-07)
In 1993 three strong dust episodes occurred in the Eastern Mediterranean Basin during the rainy season September and October. During dust episodes, and at normal conditions in order to compare dust and non-dust period, daily PM-10 aerosol samples and weekly six stage size separated aerosol samples were collected at Antalya, an eastern Mediterranean location. Both PM-10 and impactor samples were analysed for 40 elements by instrumental neutron activation analysis. Wind trajectories were examined and the dust...
Dry atmospheric fluxes of trace metals (Al, Fe, Mn, Pb, Cd, Zn, Cu) over the Levantine Basin: A refined assessment
Koçak, Mustafa; Herut, B; Nimmo, M (2005-12-01)
The current work presents dry deposition fluxes of trace metals to the Southern and Northern Levantine Basin of the Eastern Mediterranean Sea. The dry depositional inputs were calculated taking into account (i) the spatial gradients in metal aerosol concentrations across the Levantine Basin (using concentrations from two location, Erdemli, Turkey and Tel Shikmona, Israel over a 3 year sampling period), (ii) the air mass origins, (iii) air mass temporal influence across the north and south Levantine basins a...
BAYRAKTAR, Hanefi; Turalioglu, F. Sezer; Tuncel, Süleyman Gürdal; Zararsiz, Abdullah (2011-01-01)
This study investigated the elemental concentrations of atmospheric particulate matter (PM10, PM2.5) and their relationships with meteorological factors in Erzurum urban centre, Turkey. The average elemental concentration PM10 values for Ca, Mg, Si, Al, Pb, Zn, Cu and Ni in Erzurum city atmosphere were 2112, 184, 2134, 746, 6, 44, 38 and 2 ng/m(3), respectively, and that of PM2.5 were 103, 30, 717, 86, 4, 6, 70 and 1 ng/m(3), respectively. Furthermore, during the sampling period, whilst on average 90% of so...
Atmospheric trace element and major ion concentrations over the eastern Mediterranean Sea: Identification of anthropogenic source regions
GÜLLÜ, GÜLEN; DOĞAN, GÜRAY; Tuncel, Süleyman Gürdal (2005-11-01)
Concentrations of elements and ions measured in aerosol samples collected from March 1992 to the end of December 1993 were investigated to identify source regions affecting chemical composition of aerosols in the eastern Mediterranean atmosphere. Collected samples were analyzed for approximately 40 elements and ions using a combination of atomic absorption spectrometry, instrumental neutron activation analysis, ion chromatography and colorimetry. Statistical techniques, such as enrichment factors and a non-...
Chemical composition of Eastern Black Sea aerosol-Preliminary results
BALCILAR, İLKER; Zararsız, Abdullah; Kalaycı, Yusuf; DOĞAN, GÜRAY; Tuncel, Süleyman Gürdal (2014-08-01)
Trace element composition of atmospheric particles collected at a high altitude site on the Eastern Black Sea coast of Turkey was investigated to understand atmospheric transport of pollutants to this semi-closed basin. Aerosol samples were collected at a timber-storage area, which is operated by the General Directorate of Forestry. The site is situated at a rural area and is approximately 50 km to the Black Sea coast and 200 km to the Georgia border of Turkey. Coarse (PM2.5-10) and fine (PM2.5) aerosol sam...
Citation Formats
K. B. Çetin, “Elemental tracers for saharan dust,” Middle East Technical University, 2002.