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  • 1
    Electronic Resource
    Electronic Resource
    Sediments and Pollution in the Northern Adriatic Sea (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 534 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb30191.x
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  • 2
    Electronic Resource
    Electronic Resource
    Acid and alkaline deposition in precipitation on the Western coast of Sardinia, Central Mediterranean (40° N, 8° E) (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2155-2160 
    Details
    ISSN: 1573-2932
    Keywords: ionic fluxes ; acidic deposition ; Saharan influence ; particulate fluxes ; Mediterranean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The ionic composition of 53 precipitation samples collected at a coastal site in western Sardinia (Torregrande) was measured in order to determine concentrations and fluxes of the major ions. Precipitation events were sampled over a two year period, Oct'92/Oct'93 and Oct'93/Oct'94. Despite the proximity to the African continent and the detection of Saharan inputs reflected in high pH values and highnssCa fluxes, there is evidence for acidic rain with over 54% of the events having pH values 〈5.6. This would suggest long-range transport of anthropogenic inputs, as there is no obvious local source. Within the study period, a marked decrease in median pH is recorded at Torregrande in '93/'94, decreasing from 5.94 to 5.18. This is coupled with an increase in total annual flux of NO3 from 27 to 63 μg/cm2, making the average flux of NO3 in the two years comparable with that at Capo Carbonara (48 μg/cm2). Particulate fluxes at Torregrande show a marked inter- as well as intra-annual variability, from 70 to 200 μg/cm2. Variations of pH seems to be partially due to the total particulate as well asnssCa fluxes. A statistic of Saharan enriched rain episodes of the two sites showed a peak transport season in April–May and October which is two times greater at Capo Carbonara. Rainfall on the west coast, therefore, appears to be less affected by Saharan dust than rainfall on the southern coast and therefore shows greater signs of acidification due to anthropogenic inputs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186153
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  • 3
    Electronic Resource
    Electronic Resource
    Ionic composition of rainwater and atmospheric aerosols in Sardinia, southern Mediterranean (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2077-2082 
    Details
    ISSN: 1573-2932
    Keywords: ionic fluxes ; acidic deposition ; Saharan influence ; particulate fluxes ; scavenging ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The ionic composition of 55 aerosol samples and 31 precipitation events collected in a coastal site in southern Sardinia (Capo Carbonara, 39°06′ N; 09°31′ E) were compared. The samples were collected during one year period (Oct'90/Oct'91) and showed high variability in composition according to meteorological conditions. Rain and soluble part of aerosol showed a strikingly similar ionic composition: most significant anions were chlorine and sulphate, and sodium is the principal cations, followed by magnesium and calcium. The acid events are associated with N-NW trajectories (anthropogenic influxes from N. Europe) with avg. pH=4.65, non sea salt (nss) Ca=60 μeq/l and NO3/nssSO4=0.6. Southern precipitations are influenced by Saharan dust alkaline effects, with avg. pH=6.75,nssCa=271 μeq/l and NO3/nssSO4=0.4. Na/Cl ratio in rain is similar to sea water (0.87), whilst in aerosols there is a Cl loss (Na/Cl=1.10), probably due to reaction with nitric acid. Total fluxes of Ca, Mg, NO3 and SO4 were 104, 9, 64 and 113 μg/cm2, and wet deposition exceeded (65–90%) dry deposition. Scavenging ratios (SR) as defined by the equation:SR=[(Ci)rain/(Ci)air] *d, (d=1200g/m3) were calculated, using geometric means (Ci) of precipitation and aerosols collected concurrently during the period (a total of 23 samples). The SR values are Ca=3400, Cl=2400, Na, K, SO4=1700, Mg=1000 and NO3=750. These numbers could be useful to infer total fluxes by using simply rainwater ionic composition in Mediterranean semi-arid sites like Sardinia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186140
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