Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Short-time variation of mercury speciation in the urban of Göteborg during GÖTE-2005
AbstractMercury species samples for gaseous elemental mercury (GEM) with a temporal resolution of 5min, 5h and 20min integrated measurements of reactive gaseous mercury (RGM), and 24-h sampling of particulate mercury (HgP) at urban Femman and total gaseous mercury (TGM) at rural Rörvik were conducted during the measurement campaign GÖTE-2005 in Göteborg, Sweden. Results showed that average concentrations for GEM, RGM, HgP and TGM were 1.96±0.38ngm−3, 2.53±4.09pgm−3, 12.50±5.88pgm−3 and 1.63±0.19ngm−3, respectively. A reverse diurnal distribution pattern between GEM and RGM was observed, and early morning GEM concentration was elevated compared to daytime values which was likely due to activation of fossil fuel combustion, electric utilities, etc., by the formation of a nighttime inversion layer, less activity of GEM and reduced mixing. The subsequent decline and afternoon minimum were likely related to increase vertical mixing, photochemical reaction, and coupling with the coal combustion. However, the photochemical conversion from GEM during daytime and nocturnal behavior of “sticky” gases under higher relative humidity may result in strong diurnal cycles for RGM. Sampling site was heavily affected by anthropogenic sources from two distinguished wind sectors. One was ESE-SSW sector which was likely impacted by long distance transport from south highly industrialized region; the other was likely tied with local sources from N–NE sector.
Short-time variation of mercury speciation in the urban of Göteborg during GÖTE-2005
AbstractMercury species samples for gaseous elemental mercury (GEM) with a temporal resolution of 5min, 5h and 20min integrated measurements of reactive gaseous mercury (RGM), and 24-h sampling of particulate mercury (HgP) at urban Femman and total gaseous mercury (TGM) at rural Rörvik were conducted during the measurement campaign GÖTE-2005 in Göteborg, Sweden. Results showed that average concentrations for GEM, RGM, HgP and TGM were 1.96±0.38ngm−3, 2.53±4.09pgm−3, 12.50±5.88pgm−3 and 1.63±0.19ngm−3, respectively. A reverse diurnal distribution pattern between GEM and RGM was observed, and early morning GEM concentration was elevated compared to daytime values which was likely due to activation of fossil fuel combustion, electric utilities, etc., by the formation of a nighttime inversion layer, less activity of GEM and reduced mixing. The subsequent decline and afternoon minimum were likely related to increase vertical mixing, photochemical reaction, and coupling with the coal combustion. However, the photochemical conversion from GEM during daytime and nocturnal behavior of “sticky” gases under higher relative humidity may result in strong diurnal cycles for RGM. Sampling site was heavily affected by anthropogenic sources from two distinguished wind sectors. One was ESE-SSW sector which was likely impacted by long distance transport from south highly industrialized region; the other was likely tied with local sources from N–NE sector.
Short-time variation of mercury speciation in the urban of Göteborg during GÖTE-2005
Li, Jing (Autor:in) / Sommar, Jonas (Autor:in) / Wängberg, Ingvar (Autor:in) / Lindqvist, Oliver (Autor:in) / Wei, Shi-qiang (Autor:in)
Atmospheric Environment ; 42 ; 8382-8388
12.08.2008
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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