Gas Hydrate Core Sample

Gas Hydrate Core Sample



アップロード日: 2010/08/13

Video created by PolarTREC teacher Bill Schmoker onboard the International Continental Shelf Survey. This was the first piston core that returned a gas hydrate sample in the core cutter. The hydrate was about 20 feet beneath the sea floor. Once on deck it began fizzing with escaping methane. Gas hydrates turn out to be very widespread throughout the world's oceans and in permafrost areas. Studies suggest that there may be twice as much carbon stored in gas hydrates than in all other forms of fossil fuels on Earth combined. A growing concern among climate change scientists is the potential of releasing methane into the atmosphere if gas hydrates melt due to global warming. This could create a positive feedback loop because methane is a very effective greenhouse gas (a positive feedback tends to increase the process causing change.) So the worry is that more methane in the atmosphere could cause warming, which would melt more gas hydrates leading to more methane & more warming, etc. There are lots of other pieces to the global climate change puzzle but it was interesting to see this one component in person.

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Piston Core sampling aboard USCGC Healy, Canada Basin 



アップロード日: 2012/02/08

This video documents the process of piston coring in deep water (~3000m) over the so-called '09 Seamount, Canada Basin (N. Arctic Ocean). Filmed on the 2010 International Extended Continental Shelf Survey by PolarTREC teacher Bill Schmoker.