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View Resource Great Ocean Conveyor Belt: Part II

A network of currents called the Great Ocean Conveyor constantly circulates the water in Earth's oceans and redistributes heat from the tropics toward the poles, keeping some regions far more habitable than they would be otherwise. In this audio segment, scientists discuss the hypothesis that global warming is introducing fresh water into the world's oceans, disrupting the Great Ocean Conveyor....

View Resource Great Ocean Conveyor Belt: Part I

The oceans are in constant flux. The movement of ocean water is readily observable in the rise and fall of the tides and the continual lapping of waves along the coastlines of continents and islands. Less obvious is the network of currents that constantly circulates ocean water from one side of the globe to another. This map illustrates the network of currents known as the great ocean conveyor...

View Resource NOAA El Nino Page

This site defines El Nino/Southern Oscillation and La Nina, provides a glossary, and presents real-time data of sea surface temperatures, winds and anomalies over time. Also describes research programs and sensing systems like sea level stations, ocean buoys and satellites. Extensive FAQs explain the phenomenon's frequency and impacts, describe measurement systems and forecasting. Links to:...

View Resource National Ocean Service Discovery Kit: Welcome to Currents

This tutorial provides an overview of some of the major factors that cause coastal and open ocean currents. Topics include longshore and rip currents, and upwelling events, as well as discussions of the Coriolis effect, the Ekman spiral, and thermohaline circulation. There is also information on methods for measuring currents and on how ocean currents affect human activities. The 'Roadmap to...

View Resource What Causes the Gulf Stream?

Even with the waves lapping at their feet, few people consider ocean currents and their importance to global climate. Although the Gulf Stream cannot be seen flowing by off North America's East Coast, in Western Europe, the current's warming effect is undeniable. This video segment, adapted from a NOVA television broadcast, uses satellite imagery to illustrate the Gulf Stream's path and...

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