Open AccessLong‐term changes in Australian tropical cyclone numbers
Author(s) -
Dowdy Andrew J.
Publication year - 2014
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl2.502
Subject(s) - tropical cyclone , el niño southern oscillation , climatology , southern oscillation , environmental science , term (time) , multivariate enso index , la niña , atmospheric sciences , geology , physics , quantum mechanics
Tropical cyclone ( TC ) observations are used to examine changes in the TC climatology of the Australian region. The ability to investigate long‐term changes in TC numbers improves when the El Niño‐Southern Oscillation ( ENSO ) is considered. Removing variability in TC numbers associated with ENSO shows a significant decreasing trend in TC numbers at the 93–98% confidence level. Additionally, there is some indication of a temporal change in the relationship between ENSO and TC numbers, with ENSO accounting for about 35–50% of the variance in TC numbers during the first half of the study period, but only 10% during the second half.