Map of western North America showing locations of tree-ring chronologies used in PDO reconstruction. Stars indicate two PDSI (Cook et al., in press) gridded reconstructions used in PDO model.

Temperature-sensitive tree-ring chronologies used to model the annual Pacific Decadal Oscillation index. AK = Alaska, OR = Oregon. DEN = Density, RW = Ring width. Barlow Pass data from K. Briffa and F. Schweingruber. Hemlock Knob series from D. Frank. TSME= mountain hemlock, PISI = Sitka spruce, PSME = Douglas Fir. Shorter NK, WS and HM series deleted from longer reconstruction.



TREE-RING LABORATORY, LAMONT-DOHERTY EARTH OBSERVATORY OF COLUMBIA UNIVERSITY. ROUTE 9W, PALISADES, NEW YORK 10964
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Last Updated: November, 2000 (David)