China And Japan Are Harvesting “Combustible Ice” From The Seafloor

Methane hydrates frozen watery methane, essentially can be found buried beneath seafloors and permafrost landscapes all over the world, and as you might suspect, theyre extremely flammable. Japan and China have decided that this ability to generate energy shouldnt go to waste, and as reported by the Associated Press, theyve decided to start harvesting these caches.

This so-called combustible ice is certainly in plentiful supply. Just recently, the worlds largest methane hydrates store was found beneath the Pacific Ocean, stretching 8,000 kilometers (about 5,000 miles) from Central America all the way to Hawaiis eastern coastline.

This type of methane will never run out, technically its produced by methanogens, bacteria that release methane as a waste product as part of their weird metabolic processes. So theres plenty to go around, in a manner of speaking.

China has reported that its successfully mined some of the hydrates in the South China Sea as of last week, and Japan has reported a similarly viable operation earlier on in May, offshore from the Shima Peninsula.

Large-scale production is perhaps as much as a decade away, however and importantly, it comes with two major risks.

Firstly, this stuff really is quite explosive, so drilling for it may be even more dangerous than fracking or oil extraction is. Chain reactions may look good in movies, but you really dont want to blow up the entire seafloor in real life.

Natural gas is cheap and low-carbon compared to oil and coal, so it’s being invested in a lot more recently. Pakhnyushchy/Shutterstock

Secondly, and arguably more worryingly, methane is a powerful greenhouse gas (GHG), one thats at least 26 times more potent than carbon dioxide in terms of trapping heat within the atmosphere. It doesnt linger in our blue skies for anywhere near as long, but in the short-term, it is able to warm the climate quite dramatically.

This warming may be so extreme, in fact, that it melts more permafrost and boils and acidifies the oceans just enough to destabilize even more of the frozen methane supplies. Their subsequent release heats the planet even more, and so on and so forth. Before you know it, youre trapped in a self-reinforcing warming cycle without an end in sight.

Although its difficult to know when the tipping point from temporary to perpetual warming will come into effect, its best not to tempt fate here.

Mining this combustible ice will either accidentally release methane gas into the ocean or atmosphere, or it will be burned to produce fuel, whereupon itll turn into carbon dioxide. Neither of these options are good, but it seems that the abundance of the fuel is too tempting for either China or Japan to ignore.

Basically, this is fracking, but with a new twist. Natural gas on ice. Ho hum.


Add Comment