Atmospheric teleconnection patterns and eddy kinetic energy content: wavelet analysis
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 atmosph...
| Published in: | Nonlinear Processes in Geophysics |
|---|---|
| Main Authors: | , , |
| Format: | Text |
| Language: | English |
| Published: |
2018
|
| Subjects: | |
| Online Access: | https://doi.org/10.5194/npg-11-295-2004 https://npg.copernicus.org/articles/11/295/2004/ |
| Summary: | 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. |
|---|