Presentation on theme: "Natural Variations in Climate. 1. El Nino and La Nina Natural changes in climate due to warmer or cooler than normal surface water in the eastern Pacific."— Presentation transcript:
1. El Nino and La Nina Natural changes in climate due to warmer or cooler than normal surface water in the eastern Pacific
Normal Conditions/Trade Winds Normally, strong trade winds blow from the east along the equator, pushing warm water into the Pacific Ocean.
El Nino El Nino – unusual ________ of ocean temperatures of Pacific Ocean results from weakened or a reverse in trade winds in the western Pacific Ocean, allowing piled-up warm water to flow toward South America. warming
El Nino Weather in the US Northeast United States is warmer Western US is stormy Southern US is cold and wet
La Nina unusual _________ of ocean temperatures of Pacific Ocean Results in stronger low-level winds along the equator Northern US harsh winter conditions Southern US drier and warmer condition cooling
El Nino or La Nina – 2014/2015? El Nino La Nina Based on our winter, do you think its an El Nino year or a La Nina year?