Title :
Study of climatic series by time-frequency analysis
Author :
Benoist, J.P. ; Glangeaud, F. ; Martin, N. ; Lacoume, J.L. ; Lorius, C. ; Ouahman, A. Alt
Author_Institution :
Laboratorie de Glaciologie et Géophysique de l´´Environment du CNRS, Grenoble Cedex, France
Abstract :
A climatic record given by isotopic composition of ice from Dome C (Antarctica) is studied using evolutive spectral analysis by AR process. Problems which occur when trends and non periodic accidents are present in the signal are examined. Experimental studies show that filtering with a smooth time limited window is better than the use of filters with abrupt cut-off frequencies.
Keywords :
Autoregressive processes; Convolution; Cutoff frequency; Data analysis; Low pass filters; Sampling methods; Signal processing; Signal sampling; Spectral analysis; Time frequency analysis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '82.
DOI :
10.1109/ICASSP.1982.1171822
