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Stratospheric aerosol inferred from electrical conductivity during a volcanically quiescent period

: Kondo, Y.; Reiter, R.; Jaeger, H.; Takagi, M.

Pure and applied geophysics : PAGEOPH 120 (1982), 10 S. : Abb.,Tab.,Lit.
ISSN: 0033-4553
Fraunhofer IFU; 2002 in Helmholtz-Gesellschaft integriert

Profiles of electrical conductivity in the troposphere and stratosphere were measured by balloon-borne conductivity sondes at Garmisch-Partenkirchen, West Germany, from January to May, 1980, when volcanic activity was low. The aerosol concentration has been deduced from the relative decrease of conductivity from surrounding values by assuming the effective attachment coefficient of ions to aerosols. A prominent decrease of the conductivity near the tropopause is usually observed indicating high concentrations of Aitken particles (500-1000 cm E-3). A decrease of conductivity, well above the tropopause, is sometimes observed, probably due to the transport of tropospheric Aitken particles with high concentration (200-400 cm E-3) into the stratosphere. (IFU)