Whales are magnificent creatures and there is always great appeal among people for saving the lives of large mammalian species. But in a paper published by the International Monetary Fund, it turns out that that increasing the whale population might also be a good way of capturing carbon.
Marine biologists have recently discovered that whales-especially the great whales-play a significant role in capturing carbon from the atmosphere (Roman and others 2014).
…The carbon capture potential of whales is truly startling. Whales accumulate carbon in their bodies during their long lives. When they die, they sink to the bottom of the ocean; each great whale sequesters 33 tons of CO2 on average, taking that carbon out of the atmosphere for centuries. A tree, meanwhile, absorbs only up to 48 pounds of CO2 a year.
…Wherever whales, the largest living things on earth, are found, so are populations of some of the smallest, phytoplankton. These microscopic creatures not only contribute at least 50 percent of all oxygen to our atmosphere, they do so by capturing about 37 billion metric tons of CO2, an estimated 40 percent of all CO2 produced. To put things in perspective, we calculate that this is equivalent to the amount of CO2 captured by 1.70 trillion trees-four Amazon forests worth-or 70 times the amount absorbed by all the trees in the US Redwood National and State Parks each year. More phytoplankton means more carbon capture.
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