Tag Archives: CH4

The Bubbles That Changed our Perspective on the World’s Climate

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Camp water supply from a small pond on this iceberg

One of my geology field seasons in the Canadian Arctic worked out of a base-camp on Axel Heiberg Island (west of and snuggled against Ellesmere Island).  It was the spring thaw and all rivers and streams were muddy.  Our only source of clean water turned out to be a small melt-water pond atop an iceberg in Strand Fiord, a few hundred metres offshore.  The helicopter would make daily trips with a 45-gallon drum to collect the water.  The ice and its water were crystal clear and probably a few thousand years old. It was a treat. Perhaps the only thing missing was the occasional Scotch or G&T. Continue reading

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Out of Sight but no longer out of mind; Hidden sources of carbon dioxide and methane

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Emma Fiord, 1987, with lots of sea ice

With the general emphasis on carbon emissions from fossil fuels and the ensuing discussions on climate change, we tend to forget some of the natural sources of greenhouse gases that continually leak carbon dioxide (CO2) and methane (CH4) into the oceans and atmosphere.  Two such sources are gas hydrates beneath the sea floor and permafrost.  Both sequester carbon, but the sequestration is rather tenuous; both can easily be disturbed by natural and anthropogenic processes.

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