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Volcanic aerosols and interannual variation of high clouds
Author(s) -
Song Naihui,
Starr David O'C.,
Wuebbles Donald J.,
Williams Allen,
Larson Susan M.
Publication year - 1996
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 - 10.1029/96gl02372
Subject(s) - cloud cover , environmental science , climatology , outgoing longwave radiation , atmospheric sciences , volcano , aerosol , longwave , stratosphere , latitude , middle latitudes , vulcanian eruption , meteorology , geology , geography , cloud computing , radiation , convection , physics , geodesy , quantum mechanics , seismology , computer science , operating system
Interannual variability of high‐level cloudiness (HC) is examined using global outgoing longwave radiation (OLR). Variations of HC are analyzed versus a measure of global stratospheric aerosol amount and an El Nino index. Volcanic aerosols are apparently associated with widespread increases of up to 10% in an OLR‐based HC index. The most significant effects occurred in middle latitudes and persisted for several years after major eruptions. El Nino is found to be associated with decreased cloud activity in the subtropics. This study suggests that volcanic aerosols can significantly modify global cloudiness, and that stratospheric aerosol loading can be an important variable controlling the interannual variations of high level clouds and climate.