Dendroclimatology from Regional to Continental Scales: Understanding Regional Processes to Reconstruct Large-Scale Climatic Variations Across theWestern Americas - Dendroclimatology - page 192

Oceans (Villalba et al. 2001 ) closely resemble those observed for the decadal mode
of Pacific SST variability identified by Zhang et al. ( 1997 ) and Garreaud and Battisti
( 1999 ) . Temperature anomalies related to ENSO-like variations are larger and more
spatially consistent in northern than in southern Patagonia (Fig. 7.3c ) , reflecting the
decrease in correlation between Alaskan and Patagonian records with increasing
southern latitudes.
The Gulf of Alaska and northern Patagonia temperature reconstructions are dis-
played in Fig. 7.6 , along with the waveforms of the two oscillatory modes that are
Fig. 7.6 Comparison of temperature reconstructions from northern Patagonia ( blue line )and
coastal Alaska ( red line ) and their dominant oscillations isolated by using singular spectrum anal-
ysis (SSA; panel a ;Vautard 1995 ) . Common oscillatory modes in both records have periods of ( b )
> 30 years, and ( c ) 9-10 years. Percentages of the original variance contributed by Patagonian and
Alaskan waveforms are indicated in the upper and lower left corners, respectively. The Pearson's
correlation coefficient, r , between the series, is shown in the lower far right. Time series included
in ( d ) represent the sum of the oscillations shown in ( b )and( c )