Pacific Ocean one branch flows around Cape Horn and the other turns north to form the Peru or Humboldt Current. The climate patterns of the Northern and Southern Hemispheres generally mirror each other. The trade winds in the southern and eastern Pacific are remarkably steady while conditions in the North Pacific are far more varied with, for example, cold winter temperatures on the east coast of Russia contrasting with the milder weather off British Columbia during the winter months due to the preferred flow of ocean currents. In the tropical and subtropical Pacific, the El Niño Southern Oscillation (ENSO) affects weather conditions.
Pacific Marine Ecozone (CEC) coast, so there is little oceanic water exchanged between the Arctic and Pacific ecozones. The moderating effect of the Pacific Ocean results in a nearly constant year-round temperature in this ecozone. The Alaska Peninsula also inhibits the flow of cold Arctic currents from entering this zone, ensuring that throughout its extent, there is little variation in temperature. In fact, there is little exchange of oceanic waters between the Pacific Ocean and the Arctic Ocean. Ice forms here infrequently, and only in its northern areas in the Bering Sea and the Sea of Okhotsk. Pacific Marine Ecozone (CEC) The Pacific Marine