Atmospheric teleconnection patterns and eddy kinetic energy content: wavelet analysis

V. N. Khokhlov (1) , A. V. Glushkov (2) , I. A. Tsenenko (2)

1 OHMI - Odessa Hydrometeorological Institute
2 Innovative Geosciences Research Centre and Institute of Applied Mathematics

In this paper, we employ a non-decimated wavelet decomposition to analyse long-term variations of the teleconnection pattern monthly indices (the North Atlantic Oscillation and the Southern Oscillation) and the relationship of these variations with eddy kinetic energy contents (K_E) in the atmosphere of mid-latitudes and tropics. Major advantage of using this tool is to isolate short- and long-term components of fluctuations. Such analysis allows revealing basic periodic behaviours for the North Atlantic Oscillations (NAO) indices such as the 4-8-year and the natural change of dominant phase. The main results can be posed as follows. First, if the phases of North Atlantic and Southern Oscillations vary synchronously with the 4-8-year period then the relationship between the variations of the NAO indices and the K_E contents is the most appreciable. Second, if the NAO phase tends to abrupt changes then the impact of these variations on the eddy kinetic energy contents in both mid-latitudes and tropics is more significant than for the durational dominance of certain phase.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]; Sciences de la Terre

V. N. Khokhlov, A. V. Glushkov, I. A. Tsenenko. Atmospheric teleconnection patterns and eddy kinetic energy content: wavelet analysis. Nonlinear Processes in Geophysics, 2004, 11 (3), pp.295-301. ⟨hal-00302333⟩