Accession Number : ADA195792

Title :   Volatility of Aerosols in the Western European Environment.

Descriptive Note : Interim rept. no. 4,

Corporate Author : UNIVERSITY COLL GALWAY (IRELAND)

Personal Author(s) : Jennings, S G

PDF Url : ADA195792

Report Date : May 1988

Pagination or Media Count : 17

Abstract : Volatility measurements of ambient aerosol particles were made nearly continuously at Mace Head Field Station over the period 10-11 March 1988. The air containing the particles was drawn through the fused quartz tube heated to a temperature of 400 C in about 6 minutes, then allowed to cool for about 44 minutes to a temperature close to ambient and the cycle repeated. A fraction of the particles evaporate and the remainder and/or particle residues then pass through a short section of unheated tubing into a light scattering aerosol counter (a Particle Measuring Systems Model ASASP-X) where their size and number concentration are measured as a function of temperature. This data is replotted showing temperature dependence of maritime aerosol concentration in Fig.8 for five temperature cycles for the later time period for particle counter ranges 3 to 0. The resulting average fractionation curves for submicron particles compare favourably with laboratory data for ammonium sulphate (and ammonium bisulphate). This suggests that these materials are a major constituent of the submicron fraction of maritime aerosols. (JES)

Descriptors :   *AEROSOLS, AMMONIUM COMPOUNDS, ENVIRONMENTS, EXPERIMENTAL DATA, MARINE ATMOSPHERES, MEASUREMENT, PARTICLES, RESIDUES, SULFATES, THERMAL PROPERTIES, VOLATILITY, WESTERN EUROPE

Subject Categories : Physical Chemistry
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE