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Published: Wednesday 11 September, 2013

isabel marant uk online isabel marant uk online Dams the latest culprit in global warming

A fellow WSUVancouver student, Maria Glavin, sampled bubbles rising from the lake mud and measured a 36fold increase in methane during a drawdown, according to a university statement.

Methane i isabel marant uk online s 25 times more effective than carbon dioxide at trapping heat in the atmosphere. And while dams and the water behind them cover only a small portion of the earths surface, they harbour biological activity that can produce large amounts of greenhouse gases.

There are also some 80,000 dams in the US alone, according to its Army Corps of Engineer isabel marant uk online s National Inventory of Dams. Reservoirs have typically been looked at as a green energy source. But their role in greenhouse gas emissions has been overlooked, said Deemer.

Deemer and Glavins findings will be on display this week in a poster session at the national meeting of the Ecological Society of America in Portland.

Their efforts are part of a larger attempt to appreciate the role of lakes, reservoirs and streams in releasing greenhouse gases.

A study published last year in the journal Science conservatively estimated that the ability of terrestrial ecosystems to act as carbon sinks, storing greenhouse gases, could be onefourth less than estimated once emissions from reservoirs are considered.

The WSUVancouver work is the first to actually demonstrate and quantify the relationship between waterlevel draw downs and greenhouse gas releases, said John Harrison, Deemer and Glavins advisor and WSU assistant professor of Earth and Environmental Sciences. isabel marant uk online