"PDO" indices from the SVD analysis
of the SLP vs SST [Kaplan et al., 2000]

Time series corresponding to the 2nd mode from the singular value decomposition (SVD) analysis of the cross-covariance between five-year running means of marine sea level pressures (SLP) and sea surface temperatures (SST), which was interpreted as the Pacific Decadal Oscillation (PDO) mode of climate variability [Kaplan et al., 2000, Figure 12, 2nd panel], are accessible here through the clone of the Ingrid Data Library (click on the pattern below, to get to the corresponding Data Library page, where the figure download and further visualization options are available):

Click for options and more information
SLP & SST-based PDO time series from the SVD analysis of the SLP & SST cross-covariance

These PDO time series in the text format are here.

Three leading time series of the SVD analysis (1856-1990) are also accessible through the clone of the Ingrid Data Library: SLP time series and SST time series. For more details about this SVD analysis and other time series obtained from it, go to this page.

For yet more details, go to the paper
Kaplan A., Y. Kushnir, M.A. Cane, 2000: Reduced space optimal interpolation of historical marine sea level pressure: 1854-1992, J. Climate, 13, 2987-3002 [
to download in PDF]
where this SVD analysis is described in Section 5 and illustrated by Figures 11 and 12.

For more information about the PDO phenomenon, its standard index, existing alternatives, and indices of related modes, go to Dr. Nate Mantua's PDO page here.

Updates: 3 December 2011; 23 February 2017

Acknowledgements: This work was supported by NOAA Grant UCSIO - 10775411D / NA47GPO - 188 to the LDEO of Columbia University.
Ingrid and Ingrid-based Data Library webserver software were developed by Dr. M. Benno Blumenthal (IRI of Columbia University).