Physics
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21...61r&link_type=abstract
Geophysical Research Letters, Volume 21, Issue 1, p. 61-64
Physics
10
Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Volcanic Effects, Atmospheric Composition And Structure: Transmission And Scattering Of Radiation
Scientific paper
Backscatter profiles were measured at 940 and 490 nm in the winter north polar vortex using balloon borne backscattersondes. There was no mid-season breakdown of the vortex, and temperatures were sufficiently cold to expect the formation of polar stratospheric clouds (PSCs). The mass loading from the Mount Pinatubo aerosols inside the vortex was observed to be larger than that of the previous year and equivalent to about 20 megatonnes if spread uniformly over the earth. The positive identification of typical PSCs was made more difficult by the presence of considerable volcanic aerosol background. An unusual scattering layer that can probably be identified as some type of PSC was not associated with as much backscatter as observed in previous non-volcanic years with similar stratospheric temperatures. The layer apparently was composed of comparatively large particles with a relatively low, highly variable number concentration and was easily identified by the enhancement in fine structure of the scattering properties rather than an outstanding increase in average scattering values. The arctic volcanic aerosol layer was found to produce a small but significant depolarized backscattered signal. This preliminary result could be interpreted as indicating the presence of some non-spherical particles (perhaps due to freezing effects) and/or spherical particles containing inclusions of irregular shapes with differing refractive index.
Fast Hans
Kjome Norman T.
Larsen Nadia
Rosen James M.
No associations
LandOfFree
Volcanic aerosol and polar stratospheric clouds in the winter 1992/93 north polar vortex does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Volcanic aerosol and polar stratospheric clouds in the winter 1992/93 north polar vortex, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Volcanic aerosol and polar stratospheric clouds in the winter 1992/93 north polar vortex will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-869351