http://sealevel.jpl.nasa.gov/science/elninopdo/pdo/ shifting conditions in the Pacific Ocean effects across the Pacific Pacific Decadal Oscillation (PDO) The Pacific Decadal Oscillation (PDO) Pacific Decadal Oscillation (PDO) "Pacific Decadal Oscillation (PDO)" "Pacific Decadal Oscillation (PDO)" effects across the Pacific effects across the Pacific