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Fraunhofer-Institut für Atmosphärische Umweltforschung IFU
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PublicationObservation of C1-C5 aldehydes and ketones in the Bavarian alps( 1998)
;Leibrock, E. ;Slemr, J. ;Junkermann, W.Slemr, F. -
PublicationTrends in atmospheric mercury concentrations over the Atlantic Ocean and at the Wank summit, and the resulting constraints on the budget of atmospheric mercury( 1996)Slemr, F.In 1977 - 1980, 1990, and 1994 we measured the latitudinal distribution of atmospheric mercury over the Atlantic Ocean. The results of these measurements show a pronounced concentration gradient between the northern, and southern hemispheres and a rather small variability of mercury concentrations within the hemispheres, especially within the southern, hemisphere. The measurements made during the cruises also suggest globally increasing atmospheric mercury concentrations by 17.5 per cent in the northern and 14.0 per cent in the southern hemispheres between 1977 - 1980 and 1990 to concentrations of 2.25 ng Hg m(-3) in the northern and 1.50 ng Hg m(-3) in the southern hemispheres in 1990 and a global decrease between 1990 and 1994. The decrease between 1990 and 1994 of 20.4 per cent in the northern and 21.2 per cent in the southern hemispheres is consistent with the decrease of 23.3 per cent observed in the same period at the Wank summit (1780 m a.s.l.) in southern Germany. The results o f all these measurements are reviewed. From these results and from measurements reported by others, we derive several constraints on the budget of atmospheric mercury, its atmospheric burden, residence time, sources, and sinks.
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PublicationDevelopment of an airborne diode laser absorption spectrometer for fast measurements of two trace gases at lower ppbv down to pptv levels( 1993)
;Mücke, R. ;Werle, P.Slemr, F. -
PublicationPeroxide measurements at remote mountain field sites (Wank 1780 MSL and 1175 MSL): Seasonal and diurnal variations of hydrogen peroxide and organic peroxides( 1993)
;Junkermann, W. ;Fels, M. ;Pietruk, C.P. ;Slemr, F.Hahn, J. -
PublicationA feasibility study for the direct measurement of tropospheric HO2 radicals by tunable diode laser spectroscopy( 1993)
;Josek, K. ;Mücke, R. ;Slemr, F. ;Werle, P. ;Wietzorrek, J. ;Borrell, P.M.Borrell, P. -
PublicationImmissionsmessungen von Ozon, NO2, NO und SO2: Vergleich der DOAS-Technik mit konventioneller Meßtechnik( 1993)
;Martini, L. ;Schneider, U. ;Sladkovic, R. ;Slemr, F.Werle, P. -
PublicationDevelopment of a prototype IR-FM absorption spectrometer: design criteria and system performance( 1992)
;Werle, P. ;Mücke, R.Slemr, F. -
PublicationBiosphere-atmosphere exchange of nitrogen oxides.( 1988)
;Slemr, F. ;Rennenberg, H.Meixner, F.X.Some aspects of biosphere-atmosphere exchange of NO, NO2 and HNO3 are discussed. While present data indicate that HNO3 is always deposited to terrestrial ecosystems, vertical fluxes of NO and NO2 are obviously bidirectional. Mechanisms for uptake and production of NO and NO2 by soils and plants are briefly discussed. (IFU)