Sentences with phrase «continued high methane concentrations»

And the structures that remain apparently release methane gas for some time — as is evidenced by continued high methane concentrations found at crater sites and by observed emissions from crater lake surfaces.

Not exact matches

By that time, the methane plume had begun to disperse into a larger volume of water, but Joye's team continued to find methane concentrations up to 1,000 times higher than prespill levels in some places.

-- Greenhouse gases continued to climb: Major greenhouse gas concentrations, including carbon dioxide (CO2), methane and nitrous oxide, continued to rise during 2013, once again reaching historic high values.

It says greenhouse gases continued to climb, with concentrations of major gases − including carbon dioxide (CO2), methane and nitrous oxide − once again reaching historically high levels.