Archive for October, 2005

The World Ocean Freeway System

Wednesday, October 26th, 2005

Like a freeway system, the world ocean circulation distributes energy, materials and organisms far and wide. Humans have long sought knowledge of the surface circulation for monetary or military gain. Modern efforts to understand the world ocean circulation focus on climate change, weather forecasting and now- and forecasts of ocean conditions.

Today’s lecture focuses on the processes that generate the surface circulation of the world ocean. Click here for today’s podcast .

Global Warming and Humans

Friday, October 21st, 2005

Here I begin a discussion of the greenhouse effect and evidence for global warming, including melting of the Arctic ice cap. This lecture was followed by two lectures devoted to the NOVA/Frontline video “What’s Up With the Weather” produced in 2000.

Click here for today’s podcast .

Why the Ocean is Blue

Friday, October 21st, 2005

Here I discuss my favorite topic: light and its propagation through the upper ocean. Light is fundamentally important to many processes, including heating, climate change, habitat definition and photosynthesis.

Click here for today’s podcast .

The Concept of Density

Friday, October 21st, 2005

Here I discuss density and the factors that affect it in the world ocean.

Click here for today’s podcast .

Salts: Sources and Sinks

Thursday, October 20th, 2005

Here I discuss why the ocean is salty.

Click here for today’s podcast .