Sea Surface Temperature Trends in the Gulf of Alaska

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Presentation transcript:

Sea Surface Temperature Trends in the Gulf of Alaska • Analysis of COADS SST, 1950-97 • SST clusters into 5 dynamic regions • regional differences in long-term SST behavior in eastern Subarctic Pacific Bograd et al., 2004

Sea Surface Temperature Trends in the Gulf of Alaska (a) trend 1 • loadings increase west to east • warming from early 70’s • accelerated warming after 76 (b) trend 2 • accentuates trend 1 • pronounced drop after 58 • rapid rise after 72 • positive loadings = strong warming after 72 (c) trend 3 • strong warming in eastern GOA during 57-58 event • broad warming after 76 (d) trend 4 • strong interannual variability • impacts from El Niño events • strong loadings in coastal BC and WWD Bograd et al., 2004

North Pacific Regime Shifts: State Changes in Forcing SLPA, WindA “cool” “warm” “cool?” Peterson and Schwing, 2003

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