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

2. 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 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

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