@article{Andronache_Suciu_Vamoş_2008, title={On the multi-decadal oscillation of Atlantic tropical storm activity}, volume={37}, url={https://ictp.acad.ro/jnaat/journal/article/view/2008-vol37-no2-art2}, DOI={10.33993/jnaat372-882}, abstractNote={<pre>Long term Atlantic tropical storm activity is described by the time</pre><pre> series of the yearly Accumulated Cyclone Energy (ACE) Index for the</pre><pre> time interval 1851-2007. ACE is a measure of total wind energy for</pre><pre> North Atlantic basin and land falling tropical cyclone activity.</pre><pre> Since the ACE index reflects a combination of storm intensity and</pre><pre> duration it is a better measure of overall activity and likely</pre><pre> damage than the number of either basin or land falling tropical</pre><pre> storms or hurricanes. The yearly ACE time series is non-stationary,</pre><pre> and one step toward detecting possible long-term quasi-periods is to</pre><pre> detrend the original data. In this paper we use a procedure for</pre><pre> data transformation by which ACE index is fitted in least square</pre><pre> sense with polynomials of increasing order, followed by detrend. It</pre><pre> is shown that, with some approximation, the obtained time series is</pre><pre> cyclostationary, and a multi-decadal oscillation is detectable, as</pre><pre> indicated by the power spectrum analysis.</pre>}, number={2}, journal={Rev. Anal. Numér. Théor. Approx.}, author={Andronache, Constantin and Suciu, Nicolae and Vamoş, Călin}, year={2008}, month={Aug.}, pages={109–117} }