NOAA-NMFS-NWFSC TM-45: Figure 4.

U.S. Dept Commerce/NOAA/NMFS/NWFSC/Publications

NOAA-NMFS-NWFSC TM-45: Status Review of Pacific Herring (Clupea pallasi) in Puget Sound, Washington

Figure 4. First (PC1) and second (PC2) principal components in climate variables affecting Puget Sound, along with the Pacific Decadal Oscillation (PDO) (Mantua 1997). Puget
Sound climate variables included: Race Rocks sea surface temperature (SST), Neah Bay SST,Skagit River stream flow, Paradise Meadows snowpack, and Climate Division 3 aire temperature and precipitation. PCI captures decadal scale variability and resembles the PDO. PC2 reflects interannual scale variability.

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