3 Surprising Sources of Oil Pollution in the Ocean

An iridescent sheen spreads from a drop of crude oil on top of the water in the Gulf of Mexico.

Obvious oil spills, like the 168,000 gallons (635,000 liters) of oil that leaked into Galveston Bay on Saturday, usually make national news, accompanied by pictures of oil-blackened wildlife.

But such publicized events account for only a small part of the total amount of oil pollution in the oceans—and many of the other sources, such as automobile oil, go largely unnoticed, scientists say.

In fact, of the tens of millions of gallons of oil that enter North American oceans each year due to human activities, only 8 percent comes from tanker or oil pipeline spills, according to the 2003 book Oil in the Sea III by the U.S. National Research Council of the National Academy of Sciences, which is still considered the authority on oil-spill data.

Most oil pollution is “different than the pictures you see of beaches covered with tar and ducks getting stuck in it,” said David Valentine, a biogeochemist at the University of California, Santa Barbara. (Read more about how pollution harms the oceans.)

Here are three little-reported sources of oil that contribute to oil pollution in North American oceans.

1. Natural Seeps

Natural seeps of oil underneath the Earth’s surface account for 60 percent of the estimated total load in North American waters and 40 percent worldwide, according to the National Academy of Sciences.

These leakages occur when oil—which is lighter than water—escapes into the water column from highly pressurized seafloor rock. (Read about Gulf of Mexico seeps.)

Off Santa Barbara, California, some 20 to 25 tons of oil flows from seafloor cracks daily—making it one of the world’s largest seeps.

Read the full story here.

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About jensera

Jennifer Harrington is a Toronto-based illustrator, writer and graphic designer. She illustrated the best-selling children’s book series 'A Moose in a Maple Tree,' which includes the titles 'A Moose in a Maple Tree,' 'The Night Before a Canadian Christmas' and 'Canadian Jingle Bells.' She is also the owner of JSH Graphics, a boutique graphic design agency that specializes in print and web advertising. With her latest project, Eco Books 4 Kids, Jennifer has partnered with illustrator Michael Arnott to create a series of ecologically-themed ebooks for children. Her next book, 'Spirit Bear,' is due for release in the Summer of 2013. Jennifer offers two different school presentations for her 'Moose in a Maple Tree' collection, an illustration demonstration and a Christmas concert series, which can be booked at www.amooseinamapletree.com. She will be taking bookings for school readings of 'Spirit Bear' beginning in October 2013.

One response to “3 Surprising Sources of Oil Pollution in the Ocean”

  1. Nancy says :

    Reblogged this on "OUR WORLD".

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