Podrobnosti záznamu

Název
    Temporal trends in the isotope signature of air-borne sulfur in Central Europe
Údaj o odpovědnosti
    Martin Novák, Iva Jačková, Eva Přechová
Autor
    Jačková, Iva
    Novák, Martin, 1959-
    Přechová, Eva
Jazyk
    anglicky
Zdrojový dokument - seriál
    Environmental science and technology
Svazek/č.
    Vol. 35, no. 2
Strany
    p. 255-260
Rok
    2001
Poznámky
    5 obr., 1 tab., 33 bibl.
    il.
    Zkr. název ser.: Environm. Sci. Technol.
Předmětová skupina
    atmosféra
    atmosférická depozice
    frakcionace izotopická
    geochemie izotopická
    izotopy S
    oxid siřičitý
    půdy
    síra
    uhlí
    variace časové
    znečištění
Geografické jméno
    Česká republika
    Evropa střední
Klíčové slovo
    Air-borne
    Central
    Europe
    Isotope
    Signature
    Sulfur
    Temporal
    Trends
Abstrakt (anglicky)
   In various parts of the Northern hemisphere air-borne S exhibits a seasonality, with isotopically light (i.e. 32S-rich) sulfur predominating in the warm summer months. Such seasonality has been reported from the United States, Canada, Japan, and China. Elevated biological emissions of isotopically light S in summer, a temperature-dependent isotope fractionation accompanying the oxidation of SO2 and heavy rains in winter brinking 34S-rich marine S have been suggested as the controlling mechanisms. In the atmosphere of Central Europe, one of the most severely polluted regions of the world, we have found an opposite seasonal trend: Isotopically light SO2-S predominates in the cold winter months, whereas isotopically heavy SO2-S is typical of the summer. The low Ű34S values of air-borne SO2 in winter are influenced by low-Ű34S emissions from local coal-burning power plants. The coal contains isotopically light S (mean Ű34S of 1.6%.).
   Higher demand for electricity during the heating season leads to higher anthropogenic S emission rates in winter. On a yearly basis, atmospheric sulfate S in Central Europe is isotopically heavier than atmospheric SO2-S by 4%.. Atmospheric oxidation of SO2 is accompanied by an isotope fractionation resulting in 34S-enriched sulfate. In addition to the seasonality in air-borne Ű34S SO2, we report also an interannual trend of 1%. yr-1 tomward isotopically light sulfate S in atmospheric deposition. This interannual trend cannot be explained by a change in pollution sources accompanying the present massive environmental cleanup
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    28. 3. 2008
Datum importu
    8. 8. 2012