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Variations in global tropical cyclone activity and the Madden‐Julian Oscillation since the midtwentieth century
Author(s) -
Klotzbach Philip J.,
Oliver Eric C. J.
Publication year - 2015
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 - 10.1002/2015gl063966
Subject(s) - madden–julian oscillation , tropical cyclone , outgoing longwave radiation , climatology , tropical cyclogenesis , environmental science , tropical cyclone rainfall forecasting , structural basin , period (music) , cyclone (programming language) , cloud cover , atmospheric sciences , geology , meteorology , convection , geography , cloud computing , physics , paleontology , field programmable gate array , computer science , acoustics , computer hardware , operating system
The Madden‐Julian oscillation (MJO) has been documented in previous studies to significantly impact tropical cyclone activity in all ocean basins. Most of these studies have utilized the Wheeler‐Hendon index. This index is only available since 1974, the period over which remotely sensed outgoing longwave radiation data has been available. Our study utilizes a long reconstructed MJO index, based on surface pressures, which extends back to 1905. We document consistent modulation of tropical cyclone activity by the MJO in all basins over this time period. These modulations are shown to be remarkably stable over the entire analysis period. We also examine the combined impacts of El Niño‐Southern Oscillation and the MJO on tropical cyclone activity in each basin over multidecadal time scales.