Paper Info
Title
Multiscale Event-Based Mining in Geophysical Time Series: Characterization and Distribution of Significant Time-Scales in the Sea Surface Temperature Anomalies Relatively to ENSO Periods from 1985 to 2009
Abstract
In this paper, one-dimensional (1-D) geophysical time series are regarded as series of significant time-scale events. We combine a wavelet-based analysis with a Gaussian mixture model to extract characteristic time-scales of 486 144 detected events in the Sea Surface Temperature Anomaly (SSTA) observed from satellite at global scale from 1985 to 2009. We retrieve four low-frequency characteristic time-scales of Niño Southern Oscillation (ENSO) in the 1.5- to 7-year range and show their spatial distribution. High-frequency (HF) SSTA event spatial distribution shows a dependency to the ENSO regimes, pointing out that the ENSO signal also involves specific signatures at these time-scales. These fine-scale signatures can hardly be retrieved from global EOF approaches, which tend to exhibit uppermost the low-frequency influence of ENSO onto the SSTA. In particular, we observe at global scale a major increase by 11% of the number of SSTA HF events during Niño periods, with a local maximum of 80% in Europe. The methodology is also used to highlight an ENSO-induced frequency shift during the major 1997-2000 ENSO event in the intertropical Pacific. We observe a clear shift from the high frequencies toward the 3.36-year scale with a maximum shift occurring 2 months before the ENSO maximum of energy at 3.36-year scale.
Year
DOI
Venue
2014
10.1109/JSTARS.2014.2329921
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of
Keywords
DocType
Volume
el nino southern oscillation,gaussian processes,data mining,geophysical techniques,mixture models,ocean temperature,time series,1d geophysical time series,ad 1985 to 2009,enso periods,el niño southern oscillation,gaussian mixture model,high-frequency ssta event spatial distribution,intertropical pacific,multiscale event-based mining,sea surface temperature anomaly,wavelet-based analysis,distribution of the sea surface temperature anomalies events related to the enso periods,event-based mining in large geophysical datasets (big data),geophysical time series as series of significant time-scale events
Journal
7
Issue
ISSN
Citations 
8
1939-1404
4
PageRank 
References 
Authors
0.45
3
6
Name
Order
Citations
PageRank
bertrand saulquin1151.79
Ronan Fablet231247.04
Grégoire Mercier360552.49
herve demarcq440.45
antoine mangin540.78
odile hembise fanton dandon691.96