Navigation Links
Siberian lakes burp 'time-bomb' greenhouse gas

Frozen bubbles in Siberian lakes are releasing methane, a greenhouse gas, at rates that appear to be "... five times higher than previously estimated" and acting as a positive feedback to climate warming, said Katey Walter, in a paper published today in the journal Nature.

Walter's project is the first time this type of bubbling has been accurately quantified. "We realized that our previous estimates were missing a very large and important component of lake emissions - in these bubbles were the dominant source of methane from lakes," said Walter, an International Polar Year post-doctoral fellow at the Institute of Arctic Biology at the University of Alaska Fairbanks.

According to Walter, her team's calculations increase the present estimate of methane emissions from northern wetlands by between 10 and 63 percent.

Walter studied a unique type of permafrost in Siberia, called yedoma, which contains an estimated 500 gigatons of carbon, largely in the form of ancient dead plant material. "This material has been locked up in permafrost since the end of the last ice age," Walter said. "Now it is being released into the bottom of lakes, providing microbes a banquet from which they burp out methane as a byproduct of decomposition."

"Permafrost models predict significant thaw of permafrost during this century, which means that yedoma permafrost is like a time bomb waiting to go off - as it continues to thaw, tens of thousands of teragrams of methane can be released to the atmosphere enhancing climate warming," Walter said. "This newly recognized source of methane is so far not included in climate models."

Using remote sensing, aerial surveys and year-round, continuous measurements Walter and colleagues developed a new method of measuring ebullition (bubbling) point sources and used it to quantify methane emissions from two thaw lakes in North Siberia.

As they walked across the frozen lakes they mapped locations and types of discrete methane bubbling trapped in the ice. By placing bubble traps over these spots and under the water the researchers could get daily measurements of the volume of methane released by the bubbles.

Walter will continue her work on methane for her UAF International Polar Year post-doctoral project which will provide the first circumpolar estimate of methane emissions for arctic lakes, linking process-based field surveys with remote sensing analysis.


'"/>

Source:University of Alaska Fairbanks


Related biology news :

1. Siberian tigers hang tough
2. Housecat-sized Siberian tiger cubs get collared
3. Study shows eutrophic lakes may not recover for a millennium
4. Disappearing arctic lakes linked to climate change
5. Study shows hope for ridding lakes of clawed invader
6. Pollen proves beneficial for northern lakes
7. New research indicates a troubled greenhouse is brewing
8. Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect
9. Food-crop yields in future greenhouse-gas conditions lower than expected
10. Plutonium or greenhouse gases? Weighing the energy options
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/2/2016)... Technology Enhancements Accelerate Growth of X-ray Imaging ... and computed radiography markets in Thailand ... Indonesia (TIM). It provides an in-depth analysis ... as regional market drivers and restraints. The study offers ... market attractiveness, both for digital and computed radiography. Market ...
(Date:2/1/2016)... Canada , February 1, 2016 ... technological advancements to drive global touchfree intuitive gesture control ... --> Rising sales of consumer electronics coupled ... gesture control market size through ... consumer electronics coupled with new technological advancements to drive ...
(Date:1/28/2016)... -- Synaptics (NASDAQ: SYNA ), a leading developer of human ... December 31, 2015. --> --> ... 2 percent compared to the comparable quarter last year to $470.5 ... $35.0 million, or $0.93 per diluted share. ... quarter of fiscal 2016 grew 9 percent over the prior year ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... -- Beike Biotechnology, the Shenzhen ... in late 2015 to mark their successful combined efforts ... --> --> The signing, ... Therapy" was hosted by the Shenzhen Cell Bank and ... Beike Biotechnology Co., Ltd. Shenzhen,s ...
(Date:2/4/2016)... , February 4, 2016 ... a biotechnology acceleration company is pleased to provide the following ... --> Over the last 3 months we have ... securities purchase agreements exceeding $1,000,000. As a result, we have ... Mannin Research Inc. license agreement and expect that development to ...
(Date:2/4/2016)... Feb. 4, 2016 Sinovac Biotech Ltd. ("Sinovac" ... provider of biopharmaceutical products in China ... board of directors received on February 4, 2016 a ... a consortium comprised of PKU V-Ming ( Shanghai ... Ltd., CICC Qianhai Development ( Shenzhen ) ...
(Date:2/4/2016)... ... February 04, 2016 , ... Many of the engineers at FireflySci, ... What sets them apart from other cuvette manufacturers is their supercharged customer service ... On top of this steady flow of inside information, they have recently revamped ...
Breaking Biology Technology: