EARTHSS 3 Lecture Notes - Lecture 14: Walker Circulation, Indian Ocean, Downwelling

• School: UC-Irvine
• Department: Earth System Science
• Course: EARTHSS 3
• Professor: professor

Document Summary

Always get upwelling if surface water moving away from land; more ocean life due to upwelling because all the nutrients from the ocean floor rise to the surface. Always get downwelling if surface water moving toward land: be able to describe the different phases of enso, explain why they occur, and identify the phases from diagrams. Walker circulation: east-west circulation in atmosphere, driven by changes in temp across equatorial regions. Warm water from africa area move to asia. The wind starts the process coastal wind: be able to explain how el ni o and la ni a years typically affect humans and ecosystems. El nino: warm phrase; rain in north and south america. In 1997-98 caused 2100 deaths and 433 billion $ in damages. Ecosystems: unusual marine life, more precipitation, very active pacific hurricane season. La nina: cold phrase; rain in africa and asia.