HOME >> BIOLOGY >> NEWS
Northern bogs may have helped kick-start past global warming

Methane gas released by peat bogs in the northern-most third of the globe probably helped fuel the last major round of global warming, which drew the ice age to a close between 11,000 and 12,000 years ago, UCLA and Russian Academy of Sciences scientists have concluded.

But the new information in no way lets human sources of greenhouse gases off the hook for the present round of global warming, warn the team of researchers whose findings appear in the Oct. 13 issue of Science.

"If anything, our findings show just how sensitive the planet's environment is to change and just how complex the results of these changes may be," said Glen M. MacDonald, the lead author of the study and a UCLA climate change scholar.

As the incipient bogs were strong producers of methane, the findings help solve a long-standing mystery about the source of a massive infusion of atmospheric methane that helped raise the Earth's surface temperature following the ice age.

"Scientists have long known that the northern bogs produce methane, but until now they were generally dismissed as the source of this change at the close of the last ice age because they were thought to have formed too slowly and too late to be a factor," said Laurence C. Smith, a UCLA professor of geography and study coauthor. "The initial development of the huge complex of northern bogs that now cover 1.54 million square miles occurred earlier than previously thought."

With funding from the National Science Foundation, MacDonald, Smith and four other researchers cored 84 peat bogs in Siberia. By radiocarbon dating the samples, they were able to reconstruct the timing of initial bog development. The researchers then assembled previously gathered radiocarbon dates for an additional 1,432 peat bogs throughout Northern Europe, Asia and North America, including Greenland.

They then compared the formation dates for these 1,516 bogs with high-resolution ice core records of t
'"/>

Contact: Meg Sullivan
msullivan@support.ucla.edu
310-825-1046
University of California - Los Angeles
12-Oct-2006


Page: 1 2 3 4

Related biology news :

1. Northern forests less effective than tropical forests in reducing global warming
2. Altered ocean currents disturb ecosystem off Northern California and Oregon coast
3. Researchers trawl the origins of sea fishing in Northern Europe
4. Northern birds are fatter!
5. Manomet report studies impact of massive turnover of timberland in New Englands Northern Forest
6. Neutral evolution has helped shape our genome
7. Fused nasal bones helped tyrannosaurids dismember prey
8. Protowings may have helped bird ancestors cover rough terrain
9. Invasive exotic plants helped by natural enemies
10. Children at risk, says Illinois agricultural economist who helped assess the worlds ecosystem
11. Pregnant moms exposure to flu vaccine kick-starts fetal immune system

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Northern bogs may have helped kick start past global warming

(Date:8/28/2014)... called TX Invasives is now available from the Lady ... at Austin for identifying harmful non-native plant, insect and ... the United States cause about $137 billion in economic ... clog waterways, kill native plants and more. , "By ... reporting where invasive species occur, we,re more likely to ...
(Date:8/28/2014)... Entomological Society of America (ESA) is pleased to announce ... Member of the Society. Honorary Membership acknowledges those who ... significant involvement in the affairs of the Society that ... are selected by the ESA Governing Board and then ... be honored at the Awards Ceremony at Entomology 2014, ...
(Date:8/28/2014)... a handful of bacterial culprits that may drive inflammatory ... colitis, using patients, own intestinal immune responses as a ... the journal Cell . , Trillions of bacteria ... critical role in the development and progression of IBD. ... bacterial species affect a person,s susceptibility to IBD and ...
Breaking Biology News(10 mins):Mobile app makes ID of harmful plants, insects in Texas a snap 2Fred Baxendale selected as Honorary Member of the Entomological Society of America 2Yale study identifies possible bacterial drivers of IBD 2
(Date:8/28/2014)... 2014 Best Sanitizers, Inc., a leader ... processing industry, is asking industry professionals to prepare for ... the E2 soap they’re currently using to the Best ... Hand hygiene is critical to fighting cross-contamination and ... Six key criteria are identified to evaluate the effectiveness ...
(Date:8/28/2014)... Best Sanitizers, Inc., the first company ... sanitizer, asks food processors and food handling professionals to ... they’re currently using to Best Sanitizers’ Alpet® E3 ... to fighting cross-contamination and the spread of pathogens in ... are key criteria that make a hand sanitizer most ...
(Date:8/28/2014)... “This kit has an improved extraction efficiency and provides users ... said Mark Tess, PhD, Mycotoxin Product Manager for Charm Sciences. ... USDA-GIPSA inspection agencies that have a need to detect aflatoxin ... a matter of minutes with nothing but our equipment and ... grain before accepting it, but they no longer have to ...
(Date:8/28/2014)... WEST LAFAYETTE, Ind. A new research ... "nanomechanical" properties of tiny structures undergoing stress ... insights to improve designs for microelectronics and ... spectroscopy, reveals information about how heating and ... their mechanical properties. Researchers have discussed the ...
Breaking Biology Technology:Best Sanitizers, Inc. Asks Food Industry Professionals: With Fall Harvest On the Way, Is Your E2 Hand Soap Up to the Task? 2Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 2Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 3New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3
Cached News: