1. Coastal Processes and El Nino

2. El Nino  Normal: Trade winds blow west Wind piles up warm water in W. Pacific ○ Sea surface and sea surface temperature is higher in west Water cooler near S. America ○ Warm waters move to west ○ Divergence of surface waters cause upwelling

3. El Nino  El Nino: Trade winds relax Winds no longer pile up water in W. Pacific ○ Thermocline no longer steeply inclined Waters warm near S. America ○ Rain moves east ○ Upwelling reduced

4. Coastal Processes  Submergent Coastlines – sea level rise Transgression Subsidence  Emergent Coastlines – sea level fall Regression Uplift

5. Coastal Processes  See lab manual pages 285- 287 for more

6. Longshore Drift