The Historical Record of Atmospheric Pyrolytic Pollution over Europe Registered in the Sedimentary PAH from Remote Mountain Lakes
详细信息 查看全文
- 作者：Pilar Ferná ; ndez ; Rosa M. Vilanova ; Carolina Martí ; nez ; Peter Appleby ; and Joan O. Grimalt
- 刊名：Environmental Science & Technology
- 出版年：2000
- 出版时间：May 15, 2000
- 年：2000
- 卷：34
- 期：10
- 页码：1906 - 1913
- 全文大小：149K
- 年卷期：v.34,no.10(May 15, 2000)
- ISSN：1520-5851
文摘
Historical records of the deposition fluxes of polycyclicaromatic hydrocarbons (PAH) in 10 remote high altitudelakes distributed throughout Europe have been studied. Coresfrom each site were dated radiometrically, and theresults were used for the reconstruction of the pollutantchanges between 1830 and present. In general, both PAHpyrolytic fluxes and concentrations (
= 23 compounds)increased from uniform background levels (5-30 
g m-2yr-1, 20-100 ng g-1 dw, respectively) at the turn of the centuryto maximum values in 1960-1980. After these peakvalues a slight decrease to present day levels has beenobserved in some lakes, though they are still 3-20 timesgreater than the preindustrial period. Distinctive features inthe downcore PAH profiles and concentrations betweensites allowed for differentiation between five regionsin Europe: peripheral areas (Norway and the IberianPeninsula), Pyrenees and western Alps, central Alps, TatraMountains, and the Arctic. Atmospheric PAH inventorieswere estimated from the vertical integration of sedimentaryinventories using 210Pb to correct for postdepositionaltransport processes. This approach consistently reducesvariability among lakes from the same region. The resultsobtained define the lakes in the Tatra mountains andthat on Spitsbergen Island as those of highest and lowestatmospheric PAH input. The other lakes exhibit lowerdifferences although their atmospheric inventory valuesgroup consistently with the above-mentioned regions.
= 23 compounds)increased from uniform background levels (5-30 g m-2yr-1, 20-100 ng g-1 dw, respectively) at the turn of the centuryto maximum values in 1960-1980. After these peakvalues a slight decrease to present day levels has beenobserved in some lakes, though they are still 3-20 timesgreater than the preindustrial period. Distinctive features inthe downcore PAH profiles and concentrations betweensites allowed for differentiation between five regionsin Europe: peripheral areas (Norway and the IberianPeninsula), Pyrenees and western Alps, central Alps, TatraMountains, and the Arctic. Atmospheric PAH inventorieswere estimated from the vertical integration of sedimentaryinventories using 210Pb to correct for postdepositionaltransport processes. This approach consistently reducesvariability among lakes from the same region. The resultsobtained define the lakes in the Tatra mountains andthat on Spitsbergen Island as those of highest and lowestatmospheric PAH input. The other lakes exhibit lowerdifferences although their atmospheric inventory valuesgroup consistently with the above-mentioned regions.