Search: Environmental News, Oceans

Sperm whales, dolphins and other "toothed" whales today chase squid so deep in the ocean that they have to rely on biosonar instead of their eyes to find them. Two UC Berkeley paleontologists have come up with a likely evolutionary scenario to explain how these whales developed their echolocating "biosonar" over the past 40 million years.

When a whale dies and falls to the bottom in the deep ocean, it attracts a weird community of mollusks, crabs and worms that feed on its oil-rich bones. A 15 million-year-old fossilized whale discovered on Año Nuevo Island is the first fossil whale fall discovered in California, and one of the youngest and most complete fossil whale falls ever found.

If fossil fuel emissions continue their upward course, the land and oceans will eventually exceed their capacity to absorb carbon dioxide from the atmosphere, according to a new and improved computer climate model. The model, one in the first generation to include the Earth's carbon cycle, indicates that vegetation and the oceans can only absorb so much carbon dioxide before they top out and become less efficient at removing carbon from the atmosphere.

According to UC Berkeley mathematicians and their Russian colleague, turbulence at the boundary between wind and ocean should keep hurricane winds to a gentle breeze. Mathematical models of this interface, however, show that large drops of water thrown up by waves suppress the turbulence, allowing winds to build to tremendous speeds. Perhaps, they speculate, a fast decaying detergent poured on roiling seas could tame a hurricane.