1 / 11

El Nino and La Nina

El Nino and La Nina. An important atmospheric variation that has an average period of three to seven years. Goes between El Nino, Neutral, and La Nina (ENSO cycle, El Nino Southern Oscillation) Has large influence both in the tropics and midlatitudes.

lotte
Download Presentation

El Nino and La Nina

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. El Nino and La Nina • An important atmospheric variation that has an average period of three to seven years. • Goes between El Nino, Neutral, and La Nina (ENSO cycle, El Nino Southern Oscillation) • Has large influence both in the tropics and midlatitudes. • Main source of forecast skill beyond a few weeks.

  2. An Important Measure is the Temperature in the Tropical Pacific

  3. Niño Region SST Departures (oC) Recent Evolution The latest weekly SST departures are: Niño 4 -0.6ºC Niño 3.4 -1.1ºC Niño 3 -1.2ºC Niño 1+2 -1.3ºC

  4. Why do we care? • The circulations in the midlatitudes are substantially different in El Nino, Neutral, and La Nina years. • Since the temperature of the tropical Pacific changes relatively slowly, this gives some meteorologist some insights into the weather over the next several months.

  5. El Nino – weak Aleutian High

  6. La Nina – strong Aleutian High

  7. Great Web Site on ENSO: Climate Prediction Centerhttp://www.cpc.ncep.noaa.gov/products/precip/CWlink/MJO/enso.shtml

More Related