claim: In 1977, PDO switched to a warm phase.
evidences.evidence_id: Pacific decadal oscillation:3
evidences.article: Pacific decadal oscillation
evidences.evidence: There is evidence of reversals in the prevailing polarity (meaning changes in cool surface waters versus warm surface waters within the region) of the oscillation occurring around 1925, 1947, and 1977; the last two reversals corresponded with dramatic shifts in salmon production regimes in the North Pacific Ocean.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS
evidences.evidence_id: Pacific decadal oscillation:40
evidences.article: Pacific decadal oscillation
evidences.evidence: During the positive phase the wintertime Aleutian low is deepened and shifted southward, warm/humid air is advected along the North American west coast and temperatures are higher than usual from the Pacific Northwest to Alaska but below normal in Mexico and the Southeastern United States.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS
evidences.evidence_id: Pacific decadal oscillation:48
evidences.article: Pacific decadal oscillation
evidences.evidence: 1924/1925: PDO changed to a "warm" phase.
evidences.votes: REFUTES SUPPORTS
evidences.evidence_id: Pacific decadal oscillation:5
evidences.article: Pacific decadal oscillation
evidences.evidence: During a "warm", or "positive", phase, the west Pacific becomes cooler and part of the eastern ocean warms; during a "cool" or "negative" phase, the opposite pattern occurs.
evidences.votes: NOT_ENOUGH_INFO SUPPORTS
evidences.evidence_id: Pacific decadal oscillation:50
evidences.article: Pacific decadal oscillation
evidences.evidence: 1976/1977: PDO changed to a "warm" phase.
evidences.votes: SUPPORTS SUPPORTS