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Simplified EOFs - three alternatives to rotation

Jolliffe, I.T.; Uddin, M. and Vines, S.K. (2002). Simplified EOFs - three alternatives to rotation. Climate Research, 20(3) pp. 271–279.

URL: http://www.ottokinne.de/abstracts/cr/v20/n3/p271-2...
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Abstract

ABSTRACT: Principal component analysis (PCA) is widely used in atmospheric science, and the
resulting empirical orthogonal functions (EOFs) are often rotated to aid interpretation. In this paper 3
methods are described which provide alternatives to the standard 2-stage procedure of PCA followed
by rotation. The techniques are illustrated on a small example involving sea-surface temperatures in
the Mediterranean. Each method is shown to give different simplified interpretations for the major
sources of variation in the data set. All 3 techniques have advantages over standard rotation.

Item Type: Journal Article
ISSN: 0936-577X
Keywords: EOFs; Simplification; Interpretation; Rotation; LASSO; Mediterranean; SST
Academic Unit/Department: Mathematics, Computing and Technology > Mathematics and Statistics
Item ID: 3866
Depositing User: Karen Vines
Date Deposited: 06 Jul 2006
Last Modified: 02 Dec 2010 19:50
URI: http://oro.open.ac.uk/id/eprint/3866
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