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Global tropical cyclone activity: A link to the North Atlantic Oscillation
Author(s) -
Elsner James B.,
Kocher Bethany
Publication year - 2000
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 - 10.1029/1999gl010893
Subject(s) - tropical cyclone , climatology , tropical cyclogenesis , north atlantic oscillation , tropical cyclone rainfall forecasting , environmental science , latitude , tropical atlantic , el niño southern oscillation , cyclone (programming language) , multivariate enso index , geology , atmospheric sciences , southern oscillation , sea surface temperature , geodesy , field programmable gate array , computer science , computer hardware
An index of global tropical cyclone activity (GTCA) is extracted from an interbasin dispersion matrix composed of correlations in the frequency of tropical cyclones among the five principal basins of activity over the period 1966–1998. The extraction is performed using a single‐factor common factor analysis model. Factor scores provide the index of GTCA. The time series of factor scores is matched with annual series' of the El Niño‐southern oscillation (ENSO) and the North Atlantic oscillation (NAO) revealing a statistical link to the NAO, but not to the ENSO. Results suggest a greater role of high latitude atmospheric and oceanic processes in modulating tropical cyclone climate than previously considered.