Navigation Links
Supervolcano eruption -- in Sumatra -- deforested India 73,000 years ago
Date:11/23/2009

CHAMPAIGN, Ill. A new study provides "incontrovertible evidence" that the volcanic super-eruption of Toba on the island of Sumatra about 73,000 years ago deforested much of central India, some 3,000 miles from the epicenter, researchers report.

The volcano ejected an estimated 800 cubic kilometers of ash into the atmosphere, leaving a crater (now the world's largest volcanic lake) that is 100 kilometers long and 35 kilometers wide. Ash from the event has been found in India, the Indian Ocean, the Bay of Bengal and the South China Sea.

The bright ash reflected sunlight off the landscape, and volcanic sulfur aerosols impeded solar radiation for six years, initiating an "Instant Ice Age" that according to evidence in ice cores taken in Greenland lasted about 1,800 years.

During this instant ice age, temperatures dropped by as much as 16 degrees centigrade (28 degrees Fahrenheit), said University of Illinois anthropology professor Stanley Ambrose, a principal investigator on the new study with professor Martin A.J. Williams, of the University of Adelaide. Williams, who discovered a layer of Toba ash in central India in 1980, led the research.

The climactic effects of Toba have been a source of controversy for years, as is its impact on human populations.

In 1998, Ambrose proposed in the Journal of Human Evolution that the effects of the Toba eruption and the Ice Age that followed could explain the apparent bottleneck in human populations that geneticists believe occurred between 50,000 and 100,000 years ago. The lack of genetic diversity among humans alive today suggests that during this time period humans came very close to becoming extinct.

To address the limited evidence of the terrestrial effects of Toba, Ambrose and his colleagues pursued two lines of research: They analyzed pollen from a marine core in the Bay of Bengal that included a layer of ash from the Toba eruption, and they looked at carbon iso
'/>"/>

Contact: Diana Yates
diya@illinois.edu
217-333-5802
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Rosetta Stone of supervolcanoes discovered in Italian Alps
2. Complex dynamics underlie bark beetle eruptions
3. September 2007 Sumatran earthquakes research findings
4. Saving Sumatra: Indonesia reaches historic agreement
5. Destruction of Sumatra forests driving global climate change and species extinction
6. Body part by body part, Sumatran tigers are being sold into extinction
7. Berkeley Lab lends expertise to India to promote energy efficiency
8. Indiana U. at APHA: Studies about health education for people with ID, stability balls at work
9. Geologists studying groundwater arsenic levels in India empower Bengali women, children
10. Scientists identify common HPV genotypes in northern India, encourage vaccination
11. Arthritis Foundation of India Trust named winner of 2009 IOF Linda Edwards Memorial Award
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Supervolcano eruption -- in Sumatra -- deforested India 73,000 years ago
(Date:7/31/2015)... Die 10. internationale Konferenz zu Genomik (ICG-10, ... vom 22. bis 25. Oktober 2015 in ... Die Konferenz feiert in diesem Jahr ihr ... ICG weltweit zu einem der einflussreichsten jährlichen Treffen ... dynamischsten, enthusiastischsten und angenehmsten wissenschaftlichen Zusammentreffen. ...
(Date:7/27/2015)... Calif. , July 27, 2015  Synaptics ... of human interface solutions, today announced that Huawei ... touchscreen solution for its stylish smartwatch. Huawei ... its proven reliability, low power and highly responsive ... wet finger. Huawei designers also required a classic ...
(Date:7/21/2015)... 21, 2015 Today, ZTE announced its Android ... well as expected revenues in 2015 that relate to sales of ... guidance of approximately 2,200 MSEK for 2015. Jörgen Lantto, ... smartphone manufacturer in China and we are ... 5 for Axon , its ...
Breaking Biology News(10 mins):Die 10. internationale Konferenz zu Genomik (ICG-10) beginnt im Oktober 2Die 10. internationale Konferenz zu Genomik (ICG-10) beginnt im Oktober 3Synaptics Touchscreen Solution Powers New Huawei Watch 2Synaptics Touchscreen Solution Powers New Huawei Watch 3FPC's Touch Fingerprint Sensor FPC1025 in ZTE's Smartphone Axon 2
... The decline of large predators and other "apex consumers" at ... the planet. The finding is reported by an international ... of the journal Science . The study looked ... and marine ecosystems and concluded "the loss of apex consumers ...
... 14, 2011 Two studies published in the current ... that consuming in-shell pistachios is a weight-wise approach to ... curb consumption and decrease calorie intake. ... pistachios ate 41-percent fewer calories compared to those who ...
... East Coast may be at risk to higher sea levels ... years, according to a new study by NOAA. The ... surges along the East Coast during the 2009-2010 El Nio ... NOAA,s Center for Operational Oceanographic Products and Services, examined water ...
Cached Biology News:Loss of large predators caused widespread disruption of ecosystems 2Loss of large predators caused widespread disruption of ecosystems 3In-shell pistachios: The original 'slow food?' 2In-shell pistachios: The original 'slow food?' 3Strong El Niño could bring increased sea levels, storm surges to US East Coast 2
(Date:8/4/2015)... MONTREAL, Aug. 4, 2015 /PRNewswire/ - BioAmber Inc. (NYSE: ... its financial results for the quarter ending June 30, ... completion in June 2015 , The final cost ... million or $4.0 million above the high end of ... ($125 million +/- 10%) , The company announced ...
(Date:8/4/2015)... ... August 04, 2015 , ... RPS Diagnostics ... – today announced that Robert A. Gregg, PhD, has joined RPS as Senior ... years of relevant experience and remarkable achievements in the medical device and diagnostics ...
(Date:8/4/2015)... , ... August 04, 2015 , ... On August 4, ... a diverse selection of entrepreneurs from across the United States to talk about their ... is honored to be chosen to be among the attendees. , One of the ...
(Date:8/3/2015)...  ArroGen Group, an integrated advanced forensic solutions ... (FMID) technology Aug. 2-8 at the International Association ... Calif. FMID, a new ... agents, district attorneys and government agencies to build ... By analyzing chemical residues on fingerprints taken from ...
Breaking Biology Technology:BioAmber Reports Second Quarter 2015 Financial Results 2BioAmber Reports Second Quarter 2015 Financial Results 3BioAmber Reports Second Quarter 2015 Financial Results 4BioAmber Reports Second Quarter 2015 Financial Results 5BioAmber Reports Second Quarter 2015 Financial Results 6BioAmber Reports Second Quarter 2015 Financial Results 7BioAmber Reports Second Quarter 2015 Financial Results 8BioAmber Reports Second Quarter 2015 Financial Results 9BioAmber Reports Second Quarter 2015 Financial Results 10BioAmber Reports Second Quarter 2015 Financial Results 11BioAmber Reports Second Quarter 2015 Financial Results 12RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 2RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 3White House Invites uBiome CEO Jessica Richman to First-Ever Startup Demo Day 2ArroGen Previews New Fingerprint Molecular Identification Technology 2
... lecture and present a poster on proprietary siRNA ... targeting ... Quark Pharmaceuticals, Inc., a,development-stage pharmaceutical company discovering and developing ... the Cambridge Healthcare Institute,s 9th Annual Beyond,Genome Conference on ...
... than 30 years ago, when Northwestern University chemist Richard Van ... he would be using it to learn more about treasures ... watercolor recently featured in the museum,s exhibition "Watercolors by Winslow ... to be a Farmer,s Boy," painted in 1887, some of ...
... than $120,000 in the prestigious Race Across America the past two years, ... ... Wednesday, June 11,2008, Renato Shaffer will begin riding his bike for the third ... Disease, the fatal,brain disease that affects his wife and threatens his two daughters., ...
Cached Biology Technology:Quark Pharmaceuticals to Participate in 9th Annual Beyond Genome Conference 2Quark Pharmaceuticals to Participate in 9th Annual Beyond Genome Conference 3Northwestern chemist investigates lost reds in Homer painting 2HDSA-San Diego's Team 2CureHD Continues its Race to Cure Huntington's Disease 2
... are well-characterized tissue-specific stem cells that exhibit ... the life-long maintenance of the hematopoietic system. ... adult bone marrow where hematopoiesis is continuously ... in cord blood, fetal liver, adult spleen ...
Anti-TWIK-1 Immunogen: Purified peptide from amino acids 53-69 of human TWIK-1 (Accession number O00180)....
EDG-6 (1)...
RAW; Collected from 8-12 week old sexually mature mice that are free of common parasites; RAW Collected from 8-12 week old sexually mature mice that are free of common parasites....
Biology Products: