The shortcomings of nonlinear principal component analysis in identifying circulation regimes

被引：39
|
作者：
Christiansen, B [1 ]
机构：
[1] Danish Meteorol Inst, Div Climate Res, DK-2100 Copenhagen, Denmark
来源：
JOURNAL OF CLIMATE | 2005年 / 18卷 / 22期
关键词：
D O I：
10.1175/JCLI3569.1
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
Recent studies of regime behavior in the extratropical variability have been based on a nonlinear extension to principal component analysis. Multimodality has been identified in the nonlinear principal component, and the multimodality has been interpreted as evidence for the existence of multiple circulation regimes. Here, multimodality is shown to be abundant in nonlinear principal component analysis when applied to sufficiently isotropic data even if these data are inherently unimodal. It is recommended that the nonlinear principal component analysis should not be used for detection of multimodality and regime behavior.
引用
收藏
页码：4814 / 4823
页数：10
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