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Decay of the El Chichon perturbation to the stratospheric aerosol layer: Multispectral ground‐based radiometric observations
Author(s) -
Pearson E. W.,
LeBaron B. A.,
Michalsky J. J.
Publication year - 1988
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/gl015i001p00024
Subject(s) - volcano , aerosol , wavelength , stratosphere , multispectral image , environmental science , vulcanian eruption , radiometric dating , atmospheric sciences , remote sensing , perturbation (astronomy) , observatory , physics , geology , meteorology , optics , astrophysics , astronomy , seismology
A 9‐year time series of multispectral radiometric observations taken at Rattlesnake Mountain Observatory (46.4 N, 119.6 W) is analyzed to determine the long‐term behavior of the El Chichon‐induced perturbation to the stratospheric aerosol layer. A technique for determining the volcanic enhancement is described. Time series data for the volcanic enhancement in stratospheric optical depth at wavelengths of 1010, 785, 535, 486, and 428 nm are presented. The main features of the results, slight wavelength dependence and a seasonal oscillation superimposed on the expected exponential decay at all wavelengths, are discussed.