It Flows Like a River…

some science news this week.

First up, rivers on the seafloor. According to the UK Telegraph, apparently researchers have found channels on the sea bed with water of much different density and salinity than surroundings water coursing through them:

If found on land, scientists estimate it would be the world’s sixth largest river in terms of the amount of water flowing through it.

The discovery could help explain how life manages to survive in the deep ocean far out to sea away from the nutrient rich waters that are found close to land, as the rivers carry sediment and nutrients with them.

The scientists, based at the University of Leeds, used a robotic submarine to study for the first time a deep channel that had been found on the sea bed.

They found a river of highly salty water flowing along the deep channel at the bottom of the Black Sea, creating river banks and flood plains much like a river found on land.

Dr Dan Parsons, from the university’s school of earth and environment, said: “The water in the channels is denser than the surrounding seawater because it has higher salinity and is carrying so much sediment.

“It flows down the sea shelf and out into the abyssal plain much like a river on land. The abyssal plains of our oceans are like the deserts of the marine world, but these channels can deliver nutrients and ingredients needed for life out over these deserts.

“This means they could be vitally important, like arteries providing life to the deep ocean.

Nat Geo Repost: New Leviathan Whale Attacks

Illustration by C. Letenneur, Muséum National d’Histoire Naturelle, Paris, France

Evoking the poster for the original summer blockbuster, a new species of killer sperm whale attacks a baleen whale in an illustration.

Dubbed Leviathan melvillei—an homage to Moby-Dick author Herman Melville—the recently unearthed fossil sea monster lived about 13 million years ago in waters atop what’s now a Peruvian desert, according to a study published by the journal Nature on Wednesday.

Living alongside the largest sharks ever known, the raptorial—meaning actively hunting—whale measured about 60 feet (18 meters) in length, about as big as a modern male sperm whale.

But whereas modern sperm whales feed primarily on squid, Leviathan’s large teeth—some of which measured more than a foot (36 centimeters) long—suggest the whale hunted more challenging prey, including perhaps its close whale relatives.

“It was probably a very powerful and frightening animal, so it fits well with the description Melville made of Moby-Dick,” said lead study author Olivier Lambert, a paleontologist at the National Museum of Natural History in Paris.

(Related picture: “Whale Found in Egypt Desert.”)

—Ker Than

Published June 30, 2010

Ew… just Ew

So, I’ve definitely heard of some of this kind of phenomena…marine “snot” if you will. There can be all kinds of conglomerations of detritus (the dead stuff, the small particles sinking down to the ocean bottom). But not sure if I’d want to be swimming/snorkeling with it.

And these blobs are apparently on rise due to warming trends. Suprise, suprise these mucousy plumes harbor bacteria, sort of like some marine cold…