30 research outputs found
Determination of atmospheric mercury during the North Sea experiment
Total gaseous mercury (TGM) and rainwater were collected on board of two research vessels (F. S. ALKOR and R.V. BELGICA) positioned 200 km apart in the center of the North Sea during the North Sea Experiment, September 1991. On the F. S. ALKOR (up-wind ship) TGM concentrations ranged from 0.7 to 2.6 ng.m(-3) with an average of 1.5 ng.m(-3) and on the R. V. BELGICA (down-wind ship) TGM ranged from 0.7 to 1.9 ng.m(-3) with an average of 1.2 ng.m(-3). An average 20% decrease is observed from the up-wind to the downwind ship. which may largely be affected by entrainment into the free troposphere. An overall removal (entrainment) velocity of 0.95 cm.s(-1) was calculated for the whole experiment. The average removal velocity was 0.5 cm.s(-1) for dry periods and varied between 1 to 5 cm.s(-1) during rain events. Rainwater concentrations varied between 5 and 25 ng.l(-1). Based on these data an annual wet deposition flux of 1.08 ng Hg cm(-2) yr(1-) was estimated for the North Sea
Total gaseous mercury distribution in the UT/LS observed onboard the CARIBIC passenger aircraft
Decreasing trends in total gaseous mercury observations in baseline air at mace head, ireland from 1996 to 2009
Decreasing trends in total gaseous mercury observations in baseline air at mace head, ireland from 1996 to 2009
Nitrifikation und Nitratatmung im Wasser und Sediment der Unterelbe
Special print from 'Vom Wasser' vol. 65, 1985, p. 63-80, VCH Verlagsges., Weinheim (Germany, F.R.) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman
Estimation of gaseous mercury emissions in Germany Inverse modelling of source strengths at the contaminated industrial site BSL Werk Schkopau
Anthropogenic emission sources of gaseous mercury at the contaminated industrial site BSL Werk Schkopau have been determined by measurements and numerical modelling applying a local dispersion model. The investigations are based on measurements from several field campaigns in the period of time between December 1993 and June 1994. The estimation of the source strengths was performed by inverse modelling using measurements as constraints for the dispersion model. Model experiments confirmed the applicability of the inverse modelling procedure for the source strength estimation at BSL Werk Schkopau. At the factory premises investigated, the source strengths of four source areas, among them three closed chlor-alkali productions, one partly removed acetaldehyde factory and additionaly one still producing chlor-alkali factory have been identified with an approximate total gaseous mercury emission of lower than 2.5 kg/day. (orig.)Available from TIB Hannover: RA 3251(98/E/53) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman
MONITOR - Ein Messsystem zur Erfassung hydrographischer und chemischer Daten in Aestaurien und Kuestengewaessern
SIGLEDEGerman
Untersuchungen tidebedingter Konzentrationsschwankungen von Nitrat und Ammonium in der Unterelbe bei Luehesand
With 19 figs.Copy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman