Principal Component Analysis
Raw data : Monthly streamflows of Jan 1940 – Dec 2000
from 84 stations in the western US
Analysed data : Annual streamflows 1941–2000 derived from sum of
monthly streamflows (Oct-Sep)
q Spatial Pattern of PC1, PC2 and PC3
q MTM spectrum of PC1, PC2 and PC3
q Evolutive MTM spectrum of PC1, PC2 and PC3
q Spatial Pattern of PCs (PC1 and PC2)
q Evolutive MTM spectrum of PCs
v Correlation with SST of PC1, PC2
v MTM Spectrum Coherence of PCs and Tropical PC1 SST
v MTM Spectrum Coherence of PCs and Subtropical PC1 SST
v MTM Spectrum Coherence of PCs and North Pacific PC1 SST
v Evolutive MTM Spectrum Coherence of PCs and Tropical PC1 SST
v Evolutive MTM Spectrum Coherence of PCs and Subtropical PC1 SST
v Evolutive MTM Spectrum Coherence of PCs and North Pacific PC1 SST