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The effect of the Mt.St.Helens eruption on tropospheric and stratospheric ions

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

Pure and applied geophysics : PAGEOPH 120 (1982), 7 S. : Abb.,Tab.,Lit.
ISSN: 0033-4553
Fraunhofer IFU; 2002 in Helmholtz-Gesellschaft integriert

Balloon-borne observations of electrical conductivity in the troposphere and stratosphere were performed using conductivity sondes at Garmisch-Partenkirchen. West Germany, from June to November, 1980, after the Mt St. Helens eruption. A significant decrease of atmospheric in the altitudes from the troposphere to lower stratosphere has been detected until several months after the eruption in comparison with the observational results obtained before the eruption. Simultaneous ruby lidar observation a month after the eruption indicates an increased amount of aerosol at nearly the same altitude as that of conductivity decrease. Several months after the eruption it appears that aerosols detected by lidar and those effective in reducing ion concentration have different profiles. (IFU)