* Astronomy

Members Login
Username 
 
Password 
    Remember Me  
Home -> Astronomy News -> General news -> Greenland
Post Info TOPIC: Greenland
Blobrana


L

Posts: 131433
Date:
Isua mountain range
Permalink  
 

Greenland rocks provide evidence of Earth formation process

Rocks dating back 3.4 billion years from south-west Greenland's Isua mountain range have yielded valuable information about the structure of the Earth during its earliest stages of development. In these rocks, which witnessed the first billion years of Earth's history, a French-Danish team led by researchers from the 'Magmas and Volcanoes' Laboratory (CNRS / Université Blaise Pascal / IRD) have highlighted a lack of neodymium-142, an essential chemical element for the study of the Earth's formation. This deficit supports the hypothesis that between 100 and 200 million years after its formation, the Earth was made up of an ocean of molten magma, which gradually cooled. The work, which was carried out in collaboration with the Laboratoire de Géologie de Lyon (CNRS / Université Lyon 1 / ENS de Lyon) and the University of Copenhagen, was published on 1 November 2012, in the journal Nature.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
RE: Greenland
Permalink  
 

Satellites see Unprecedented Greenland Ice Sheet Melt

For several days this month, Greenland's surface ice cover melted over a larger area than at any time in more than 30 years of satellite observations. Nearly the entire ice cover of Greenland, from its thin, low-lying coastal edges to its 3.2-kilometer center, experienced some degree of melting at its surface, according to measurements from three independent satellites analysed by NASA and university scientists.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

 Discovery of historical photos sheds light on Greenland ice loss

A chance discovery of 80-year-old photo plates in a Danish basement is providing new insight into how Greenland glaciers are melting today.
Researchers at the National Survey and Cadastre of Denmark - that country's federal agency responsible for surveys and mapping - had been storing the glass plates since explorer Knud Rasmussen's expedition to the southeast coast of Greenland in the early 1930s.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
Petermann Glacier
Permalink  
 

Petermann Glacier break-up

New pictures have revealed the extent to which a huge glacier in northern Greenland has broken up in just two years, claims a glaciologist.
Dr Alun Hubbard of Aberystwyth University said he was "gob-smacked" by the scale of the Petermann Glacier's break-up since he last visited in 2009.
The glacier is 300km long and 1000m high - over three times the height of the Eiffel Tower.
Last year, it shed a piece of ice measuring 200 sq km.
Read more



__________________
Blobrana


L

Posts: 131433
Date:
RE: Greenland
Permalink  
 

NASA Releases New Image of Massive Greenland Iceberg

On Aug. 5, 2010, an enormous chunk of ice, about 251 square kilometres in size, or roughly four times the size of Manhattan, broke off the Petermann Glacier along the northwestern coast of Greenland. The Petermann Glacier lost about one-quarter of its 70-kilometre-long floating ice shelf, according to researchers at the University of Delaware, Newark, Dela. The recently calved iceberg is the largest to form in the Arctic in 50 years.
Read more

__________________
Blobrana


L

Posts: 131433
Date:
Petermann Glacier
Permalink  
 

Satellite images released by Nasa have captured the scale of the ice island that broke off the Petermann Glacier in northwestern Greenland on 5 August.
Read more

__________________
Blobrana


L

Posts: 131433
Date:
RE: Greenland
Permalink  
 

Huge ice sheet breaks from Greenland glacier

A giant sheet of ice measuring 260 sq km has broken off a glacier in Greenland, according to researchers at a US university.
The block of ice separated from the Petermann Glacier, on the north-west coast of Greenland.
Read more

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Bedrock at NEEM reached on Tuesday 27, 2010!

Professor Dorthe Dahl-Jensen with the last icecore drilled at a depth of 2537,36 m. The last 2 m of ice above the bedrock contains rocks and other material that has not seen sunlight for hundreds of thousands of years. Bedrock has been reached Tuesday July 27 2010 at the deep ice core drilling site North Greenland Eemian Ice Drilling (NEEM) on the Greenland Ice Sheet at the depth 2537.36 m.
Read more

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Greenland Ice Core Team Reaches Bedrock

Professor Dorthe Dahl-Jensen with the last icecore drilled at a depth of 2537,36 m. The last 2 m of ice above the bedrock contains rocks and other material that has not seen sunlight for hundreds of thousands of years. Bedrock has been reached Tuesday July 27 2010 at the deep ice core drilling site North Greenland Eemian Ice Drilling (NEEM) on the Greenland Ice Sheet at the depth 2537.36 m.
Read more

__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

University of Miami scientists are surprised at how rapidly the ice is melting in Greenland and how quickly the land is rising in response.
Greenland has a dense icecap up to a mile thick that covers much of the island, pressing down the land beneath and lowering its elevation.
Now, the scientists say Greenland's ice is melting so quickly that the land underneath is rising at an accelerated pace.
According to the study, some coastal areas are going up by nearly one inch per year and if current trends continue, that number could accelerate to as much as two inches per year by 2025, explains Tim Dixon, professor of geophysics at the University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) and principal investigator of the study.
Read more

__________________
«First  <  1 2 3 4  >  Last»  | Page of 4  sorted by
Quick Reply

Please log in to post quick replies.
Home -> Astronomy News -> General news -> Greenland


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard