El Niño and La Niña.

Slides:



Advertisements
Similar presentations
Increased Storm Activity around the Globe.
Advertisements

Blow to the west across the tropical pacificTrade winds blow to the west across the tropical pacific Winds pile up warm water in the west pacific so the.
El Niño- Southern Oscillation
El Niño & La Niña.
El Niño. How do ocean currents affect weather and climate? Oceans store and transport heat. – High heat capacity – Stores and transports energy from the.
El Nino, La Nina, and their Affects in Oklahoma. El Nino Conditions Warming of central and eastern equatorial Pacific waters Trade wind differences –
Natural Processes that Change Climate
El Nino Southern Oscillation (ENSO)
Lesson 11: El Niño Southern Oscillation (ENSO) Physical Oceanography
Remember “normal” ocean circulation? El Nino? (warm) Trade winds weaken Thermocline drops Upwelling is cut off SST rises in E.Pacific High & Low pressure.
El Niño and La Niña By Mr. D. Atmospheric and oceanic disturbances in Pacific Ocean El Niño-Southern Oscillation (ENSO) –Warm {El Niño} and cold phases.
Chapter 5—Part 1 Ocean Circulation/ Upwelling Zones/ El Niño.
Understanding El Nino and La Nina Aim: To understand the what this weather phenomena is and what conditions it brings (A.K.A – To understand a bloody difficult.
Dynamic Climate An overview of Climate Oscillations.
Do Now; Are there weather patterns that influence places thousands of miles away?
Ocean Circulation: El Niño
CHAPTER 7 Ocean Circulation
El Nino and La Nina opposite phases of the El Niño-Southern Oscillation (ENSO) cycle. The ENSO cycle describes the changes in temperature between the ocean.
Southern Oscillation- Atmospheric component of ocean's El Niño. Oscillation in the distribution of high and low pressure systems across the equatorial.
2015. equator Normally, trade winds converge at the equator and push warm water westward. In the eastern Pacific, cold water rises to the surface - upwelling.
Meredith Taghon Physical Oceanography Fall 2015 Bigger Stronger Faster: Current El Niño
 Abnormally high surface ocean temperatures off the coast of South America  Causes unusual weather patterns across the globe El Nino.
El Niňo. El Nińo: A significant increase in sea surface temperature over the eastern and central equatorial Pacific that occurs at irregular intervals,
El Niño – The Christ Child (in Spanish)
1 NORMAL Normally, trade winds blow warm surface water toward the western Pacific. This causes the thermocline to rise near the surface in the eastern.
Much of the work that follows is straight from (or slightly modified) notes kindly made available by Jenny Pollock NCG and or spk (?)…. Nice to have a.
Ocean Circulation: El Niño El Niño-Southern Oscillation (ENSO) El Niño (Spanish for “the Child” in reference to baby Jesus) = warm surface current in.
Anomalous Behavior Unit 3 Climate of Change InTeGrate Module Cynthia M. Fadem Earlham College Russian River Valley, CA, USA.
Ocean Current s.  Warm currents flow away from the equator.  Cold currents flow toward the equator. Ocean Currents.
Normal Conditions The trade winds move warm surface water towards the western Pacific. Cold water wells up along the west coast of South America (the Peru.
Currents & Climate Ch Warm-water currents i.e. Gulf Stream Creates mild climate at high latitudes such as British Isles (much warmer than Newfoundland.
 El Nino is an abnormal warming of surface ocean waters in the Pacific Ocean  This occurs every 3-5 years  Part of what's called the Southern Oscillation.
The ENSO Cycle Naturally occurring phenomenon – El Nino / Southern Oscillation (ENSO) Cycle Equatorial Pacific fluctuates between warmer-than-average.
ENSO El Niño—Southern Oscillation  El Niño (Spanish for “the Child” in reference to baby Jesus) = warm surface current in equatorial eastern Pacific.
Climatology The scientific study of _____________.
Non El Niño Years The easterly trade winds of the tropics drag the surface waters of the eastern Pacific away from the coastlines of the Americas.easterly.
The unpredictability of GW and El Nino events leading to increasing natural hazards.
El Nino WORLD AT RISK Learning Intentions:
El Niño–Southern Oscillation (ENSO): What is it?
Climate Phenomena.
El Niño and La Niña.
Ocean/Air interaction
El Nino.
Ocean Currents & Global Climates
1. Why do we have climate zones? 2. Can pollution change a climate?
El Nino.
El Nino.
El Nino.
El Niño and La Niña.
El Niño / Southern Oscillation (ENSO)
Differential Heating – Specific Heat
El Nino and La Nina.
EL NINO Figure (a) Average sea surface temperature departures from normal as measured by satellite. During El Niño conditions upwelling is greatly.
Chapter 14: Section ). You will be able to define what an el niño and la niña Event is. 2). You should be able to explain what causes el niño.
ENSO El Nino / La Nina episodes of ocean warming and cooling
El Nino Southern Oscillation
Bellwork 4/13 Describe the weather associated with cyclones and anticyclones. What are the winds called between the Equatorial Low and the Subtropical.
David Tedesco Physical Oceanography
Chapter 19.3 Regional Wind Systems.
Short term Climate change
200 m 1000 m Fig (EFB).
Explain air pressure’s role in wind formation.
El Nino and southern Oscillation (ENSO)
Aquatic Science Fall Final Review
El Nino.
El Niño/La Niña.
Natural Climate Variability
Presentation transcript:

El Niño and La Niña

Normal & El Niño Model http://esminfo.prenhall.com/science/geoanimations/animations/26_NinoNina.html

Normal Conditions Air pressure across equatorial Pacific is higher in eastern Pacific Strong southeast trade winds Pacific warm pool on western side Thermocline deeper on western side Upwelling off the coast of Peru

Normal conditions Fig. 7.18 a

S SST 5/31/1988 Normal, non- El Nino

El Niño-Southern Oscillation (ENSO) Trade winds weaken Warm countercurrents become unusually strong and replace normally cold offshore waters with warm equatorial waters High pressure in eastern Pacific weakens Warm pool migrates eastward Thermocline deeper in eastern Pacific Downwelling Lower biological productivity Corals particularly sensitive to warmer seawater

El Niño-Southern Oscillation (ENSO): Warm phase (El Niño) Fig. 7.18 b

SST 5/13/1992 El Nino

Global consequences of El Niño El Niño has global consequences and is both an atmospheric and oceanic phenomena Drought in SE Asia and Australia Flooding and increased rainfall in S. America Strong winter storms on US West Coast Northward displacement of Jet Stream Weaker trade winds Causes more winter rain in Texas, mild winter in Midwest

ENSO events Strong conditions influence global weather Flooding, drought, erosion, fires, tropical storms, harmful effects on marine life

La Niña Trade winds are especially strong Opposite of El Niño When surface temperatures in the eastern Pacific are colder than average During La Niña winter-lots of colder than normal air blows over the Pacific Northwest, but warms the rest of the US Trade winds are especially strong Can also increase hurricane activity

Weak and Strong El Niños

ENSO events El Niño warm phase about every 3 to 8 years Highly irregular Phases usually last 12 to 18 months Currently in El Niño! Fig. 7.20

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.