Backscatter measurements of stratospheric aerosols at Thule during January-February 1992

Within the European Arctic Stratospheric Ozone Experiment (EASOE) aerosols from the volcanic eruption of Mt. Pinatubo have been observed during 6 balloonborne backscatter soundings in January and February 1992 under different polar vortex conditions from Thule, Greenland. The vortex boundary seemed...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: LARSEN N, B. KNUDSEN, T. S. JOERGENSEN, A. DI SARRA, D. FUÀ, G. FIOCCO, M. CACCIANI, J. M. ROSEN, N. KJOME, DI GIROLAMO, Paolo
Other Authors: Larsen, N, B., Knudsen, T. S., Joergensen, A., DI SARRA, D., Fuà, G., Fiocco, M., Cacciani, J. M., Rosen, N., Kjome
Format: Article in Journal/Newspaper
Language:English
Published: 1994
Subjects:
Arctic
Greenland
Thule
Online Access:http://hdl.handle.net/11563/2165
https://doi.org/10.1029/93GL02896
Description
Summary:Within the European Arctic Stratospheric Ozone Experiment (EASOE) aerosols from the volcanic eruption of Mt. Pinatubo have been observed during 6 balloonborne backscatter soundings in January and February 1992 under different polar vortex conditions from Thule, Greenland. The vortex boundary seemed to retard stratospheric aerosol mixing into the inner parts of the vortex from lower latitudes; however, when Thule was outside the vortex large aerosol loadings were measured. The aerosols were simultaneously observed by groundbased lidar, whereby aerosol backscatter measurements in three different wavelengths made it possible to obtain information about the particle sizes. Parameters of lognormal distributions have been derived, using a least square approach between observed and calculated backscatter coefficients from Mie theory. The aerosol surface area density was increased by factors 10–50, compared to the background levels at pre‐volcanic conditions.

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