in 1905, pdo switched to a warm phase.
in 1905, pdo switched to a warm phase.
pacific decadal oscillation:15
during el nino events, deep convection and heat transfer to the troposphere is enhanced over the anomalously warm sea surface temperature, this enso-related tropical forcing generates rossby waves that propagate poleward and eastward and are subsequently refracted back from the pole to the tropics.