HOME >> BIOLOGY >> NEWS
Greenland's ancient forests shed light on stability of ice sheet

Ice cores drilled from southern Greenland have revealed the first evidence of a surprisingly lush forest that existed in the region within the past million years. The findings from an international study published today in the journal Science suggest that the southern Greenland ice sheet may be much more stable against rising temperatures than previously thought.

Researchers analysed ice cores from a number of locations in Greenland, including Dye 3 in the south of the country. From the base of the 2km deep Dye 3 core, they were able to extract what they believe is likely to be the oldest authenticated DNA obtained to date.

By analysing these DNA samples, the researchers identified a surprising variety of plant and insect life, including species of trees such as alder, spruce, pine and members of the yew family, as well as invertebrates related to beetles, flies, spiders, butterflies and moths. The researchers believe that the samples date back to between 450,000 and 800,000 years ago.

"We have shown for the first time that southern Greenland, which is currently hidden under more than 2km of ice, was once very different to the Greenland we see today," explains Professor Eske Willerslev, a Wellcome Trust Bioarchaeology Fellow from the University of Copenhagen, who led the study."Back then, it was inhabited by a diverse array of conifer trees and insects."

The research implies that ancient forests covered southern Greenland during a period of increased global temperatures, known as an interglacial period. When temperatures fell again, the area became covered in ice. This ice sheet appears to have remained during the last interglacial period (116,000-130,000 years ago) when the temperature was 5C warmer than today, contrary to the view currently held by scientists. Professor Dorthe Dahl-Jensen, also at the University of Copenhagen, has shown that in fact, even during this interglacial period, the ice thickness at Dye 3 would
'"/>

Contact: Craig Brierley
c.brierley@wellcome.ac.uk
44-207-611-7329
Wellcome Trust
5-Jul-2007


Page: 1 2

Related biology news :

1. Immunity in social amoeba suggests ancient beginnings
2. Modern brains have an ancient core
3. Caribbean frog populations started with single, ancient voyage on South American raft
4. Caribbean frogs started with a single, ancient voyage on a raft from South America
5. An ancient bathtub ring of mammoth fossils
6. Volcanic eruptions, ancient global warming linked
7. Fossil discovery marks earliest record of limbloss in ancient lizard
8. Smithsonian scientists report ancient chili pepper history
9. Global warming of the future is projected by ancient carbon emissions
10. UCSD scientists establish connection between life today and ancient changes in ocean chemistry
11. Fossils of ancient sea monster found in Montana

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/26/2020)... (PRWEB) , ... August 25, ... ... clinical-stage biotechnology company developing novel pharmaceuticals targeting mitochondria, in partnership with Essex ... enrolment in its pivotal U.S. Phase 3 VISTA-2 study of SkQ1 ophthalmic ...
(Date:8/23/2020)... (PRWEB) , ... August 21, 2020 , ... ... Rigaku Corporation has been published and is now available on the company’s ... X-ray diffraction—serves the X-ray analysis community, presenting current news and crystallographic research. ...
(Date:8/21/2020)... ... August 19, 2020 , ... ... conference and expo uniting life science, data science, informatics and IT leaders goes ... “In this period of uncertainty and change, Bio-IT takes the leadership role of ...
Breaking Biology News(10 mins):
(Date:8/3/2020)... ... August 03, 2020 , ... ... Jim Corrigan, President and CEO has been named one of the 100 most ... industry sectors, PharmaVoice 100 honorees are selected based on how they have inspired ...
(Date:7/31/2020)... , ... July 29, 2020 , ... ... can combine up to three different materials for use with CRM, neurostimulation, vascular, ... to three materials to meet specific design requirements, performance, and cost criteria; especially ...
(Date:7/22/2020)... ... 2020 , ... Join experts from Reed Tech , Gary Saner, Sr. ... one hour live webinar on Thursday, August 13, 2020 at 11am EDT ... medical devices. Specifically, for medical devices, the NMPA has departments dealing with medical device ...
(Date:7/10/2020)... ... July 08, 2020 , ... Bode Technology, ... expansion of laboratory operations through its COVID-19 testing service, Bode-CARES . Bode-CARES ... , Bode-CARES provides a turnkey solution that includes a comprehensive collection ...
Breaking Biology Technology:
Cached News: