'Twilight Zone' at ocean depth traps greenhouse gas

Irani SenApr 27 2007

Ah! The solution to carbon gas ' the key global warming-triggering greenhouse gas -- seems to be getting trapped there in the darkest depths of the ocean. Nature seems to be meticulously equipped balancing its own compositions.

the oceans mesopelagic zone 9
the oceans mesopelagic zone 9

Called 'mesopelagic' or 'twilight zone', the strange, but real intermediate depth in the seas is found to amazingly gobble carbon, with the marine organisms there consuming and recycling it!

The carbon gets trapped in this region to 'interestingly' help the ocean bed from volcanic eruption by preventing it from sinking deeper. This critical carbon storage area also helps keep it from re-entering the atmosphere as greenhouse gas carbon dioxide. Thus, it can do no harm to Earth's climate.

Ken Buesseler of the Woods Hole Oceanographic Institute in Massachusetts, co-author of the new marine twilight zone study said,

The twilight zone is a critical link between the surface and the deep ocean. We're interested in what happens in the twilight zone, what sinks into it and what actually sinks out of it.

The animals and bacteria living in the twilight zone often consume the carbon, decomposing it further to convert it into dissolved organic and inorganic forms. These forms eventually find their way back to the surface, getting released in the atmosphere.

But, unfortunately, not all of this carbon can make its way through these parts of the ocean to hugely relieve the ocean from rising temperatures affecting its life.

Photo Credit: jamstec.go.jp

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