Diagnostics of the La Niña events in 1900-2018

Diagnostics of La-Nina events from 1900 to 2018 is done in this paper using COBE SST2 data sets. Two La Niña space-time types were selected on the basis of two methods. The first of them is empirical orthogonal functions method. The second one is hierarchical cluster analysis. Both of methods showed...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2020-11, Vol.606 (1), p.12036
Main Authors: Marchukova, O V, Voskresenskaya, E N, Lubkov, A S
Format: Article
Language:English
Subjects:
Anomalies
Cluster analysis
Dispersion
El Nino
Empirical analysis
La Nina
Meteorological satellites
Orthogonal functions
Sea surface temperature
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Summary:Diagnostics of La-Nina events from 1900 to 2018 is done in this paper using COBE SST2 data sets. Two La Niña space-time types were selected on the basis of two methods. The first of them is empirical orthogonal functions method. The second one is hierarchical cluster analysis. Both of methods showed the absolute identity two selected types. Analyzing the spatiotemporal series of the sea surface temperature anomalies (SSTA) in the equatorial Pacific two main EOFs were obtained. The first EOF mode describes ∼46% of the total dispersion SSTA variability in the equatorial Pacific and demonstrated two consecutive La Niña events that arise after the strong canonical El Niño. The second mode accounts for ∼ 21% of the total dispersion SSTA variability and shows a nature of the East Pacific La Niña occurrence.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/606/1/012036