Search results for "Cloud water"
showing 3 items of 3 documents
The size distribution of primary biological aerosol particles in cloud water on the mountain Kleiner Feldberg/Taunus (FRG)
2000
During the field campaign, FELDEX 95 cloud water samples were collected and the insoluble particles were analysed by single particle analysis in order to determine the content of primary biological aerosol particles (PBAP). It is found that 25% of the total insoluble particles are biological ones. During cloud events with increasing wind velocity, the concentration of biological particles also increases. Anthropogenic influence leads to a higher amount of both total and biological particles. Within the size distribution, the percentage of biological particles decreases with increasing radius.
A new method to measure the size distribution of insoluble submicron particles in water
1994
Abstract In the atmosphere, cloud and fog droplets usually contain insoluble material. The role of these insoluble particles is still unknown today, and is of interest to study. To determine the size distribution and number concentration of these particles in water, different techniques are available. The instrumentation, however, to measure nanometer-sized particles down to 50 nm diameter is not known. A new instrument, the Liquid Tandem Differential Mobility Analyser (LTDMA), was developed to measure size distributions of insoluble particles in water in the size range 50–300 nm in diameter. The new method is based on nebulising, e.g. cloud water and forming a residue aerosol consisting of…
Number size distribution of insolubleatmospheric aerosol particles in fog/cloud-water
1991
AbstractThe design and the efficiency — curve of a newly developed fog/cloud-water sampler (rotating arm collector)is discussed. Fog/cloud-water samples were taken during Oct./Nov. 1990 on the mountain ‘Kleiner Feldberg’/Taunus, FRG. The number size distribution of the insoluble atmospheric aerosol particles in water is determined in the size range 0.025μm p . The size distribution of activated aerosol particles in air is derived from this distribution. Comparison of the spectrum of the activated aerosol particles with the total distribution of aerosol particles in air (measured during the same campaign, but in the size range 0.008μm p ) indicates, that in the size range r p > 0.06μm the ma…