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Estimation of the size distribution of Pinatubo volcanic dust from Bishop's ring simulations
Author(s) -
Asano Shoji
Publication year - 1993
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl00512
Subject(s) - volcano , radius , observable , effective radius , atmospheric sciences , vulcanian eruption , scattering , particle size distribution , ring (chemistry) , distribution (mathematics) , physics , meteorology , geology , environmental science , mathematics , optics , astrophysics , seismology , particle size , chemistry , mathematical analysis , paleontology , computer security , organic chemistry , quantum mechanics , galaxy , computer science
Since the middle of July 1991, approximately one month after the explosive eruptions of Mt. Pinatubo in the Philippines, Bishop's ring phenomena were occasionally observed over Japan under favorable conditions of clear skies. On the basis of the single‐scattering approximation, the chromaticity of Bishop's rings was simulated. It was found that Bishop's rings are observable only when a sufficient amount of aerosols exist that have an unusually narrow mono‐modal size distribution and a mode radius between 0.57μm and 0.63μm, with an effective variance of less than 0.05.