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The Millipore Filter Technique for Ice Nuclei Measurement
Publisher: American Meteorological Society
Abstract: An investigation into the technique for measuring ice nuclei by the Millipore filter method is presented. It was found that the measured concentration is independent of the volume air sampled up to 1200 liters. Furthermore, ...
Measurement of Aerosol Particles and Trace Gases in METROMEX
Publisher: American Meteorological Society
Abstract: Several experiments were conducted in St. Louis during the METROMEX program to determine the properties and formation of aerosol particles. It was found that the average of several distributions obtained during extended ...
Field Observations of In-Cloud Nucleation and the Modification of Atmospheric Aerosol Size Distributions after Cloud Evaporation
Publisher: American Meteorological Society
Abstract: The authors measured aerosol and droplet size distributions in the range from 0.1 to 50 µm, concentrations and sizes of precipitation particles, concentrations of condensation nuclei, and state parameters in and in the ...
Tracer Study of Vertical Exchange by Cumulus Clouds
Publisher: American Meteorological Society
Abstract: This paper examines the exchange of material by convective cloud processes between the mixed layer and the overlying free troposphere. It describes results of a field experiment that was conducted in Lexington, Kentucky, ...
The Fragmentation of Freezing Water Droplets in Free Fall
Publisher: American Meteorological Society
Abstract: The fragmentation of water droplets during freezing has not been previously established under conditions which resemble those in natural clouds. In laboratory experiments designed to investigate this phenomenon it is ...
Airborne Measurements of Pollutants over Urban and Rural Sites
Publisher: American Meteorological Society
Abstract: Results of urban pollutant measurements made during an aircraft flight downwind of St. Louis are presented. Decreases in the levels of SO2, NOx, and aerosol are noted, while O3 is observed to increase to more than 200 ppb ...
Comparison Between Polluted and Clean Air Masses over Lake Michigan
Publisher: American Meteorological Society
Abstract: Clean and polluted air masses, advected over Lake Michigan, were studied using instrumented aircraft during the summers of 1976 and 1978. The results show that regardless of the degree of pollution, the particle size ...
Simultaneous Aerosol Size Distribution and Turbidity Measurements over St. Louis during METROMEX 1975
Publisher: American Meteorological Society
Abstract: An experiment designed to measure aerosol size distributions and turbidity simultaneously over a metropolitan area is described. The particle volume size distributions measured in the city plume are found to be bimodal, ...