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Antarctic

The making of Antarctica

New explanation links competing theories of the origin of Antarctic glaciation and highlights complexity of climate change
Tue, 2017-01-31 13:12

One of the big mysteries in the scientific world is how the ice sheets of Antarctica formed so rapidly about 34 million years ago, at the boundary between the Eocene and Oligocene epochs.

There are 2 competing theories:

The first explanation is based on global climate change: Scientists have shown that atmospheric carbon dioxide levels declined steadily since the beginning of the Cenozoic Era, 66 million years ago. Once CO2 dropped below a critical threshold, cooler global temperatures allowed the ice sheets of Antarctica to form.

Contact Information

Contact: Galen Halverson
Organization: Dept. of Earth and Planetary Sciences, McGill University
Email:

Secondary Contact Information

Contact: Katherine Gombay
Organization: Media Relations, McGill University
Office Phone: 514-398-2189
Category:
Source Site: /newsroom

Sea ice extent in Arctic and Antarctic reached record lows in November

Wed, 2016-12-07 14:25

“Both the Arctic and Antarctic experienced record lows in sea ice extent in November, with scientists astonished to see Arctic ice actually retreating at a time when the region enters the cold darkness of winter.” (The Guardian) (National Snow & Ice Data Center)

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Source Site: /newsroom

Antarctic permafrost may not be habitable for microbes – So is Mars?

Mon, 2016-01-25 09:42

 

"It doesn't mean there's no life on Mars, but what it does mean is it's going to be harder to find," said Jacqueline Goordial, the McGill University researcher who led the study, in an interview with Rachelle Solomon on CBC's Breakaway.

Source Site: /macdonald

Nearing the limits of life on Earth

Tue, 2016-01-19 14:26

Failure to find active microbes in coldest Antarctic soils has implications for search for life on Mars

Natural Resource Sciences professor Lyle Whyte and postdoctoral fellow Jackie Goordial talk about their research which suggests that it is unlikely that it is unlikely that there is any microbial life to be found on Mars.

Source Site: /macdonald

Nearing the limits of life on Earth

Tue, 2016-01-19 10:27

By Katherine Gombay, McGill Newsroom

Failure to find active microbes in coldest Antarctic soils has implications for search for life on Mars

Contact Information

Contact: Prof. Lyle Whyte
Organization: Dept. of Natural Resource Sciences - McGill University
Email:
Office Phone: 514-398-7889

Secondary Contact Information

Contact: Katherine Gombay
Organization: Media Relations - McGill University
Office Phone: 514-398-2189
Source Site: /newsroom

Global warming felt to deepest reaches of ocean

Study shows climate change has put a freshwater lid on the Antarctic ocean, trapping warm water in ocean depths .
Mon, 2014-03-03 11:30

Contact Information

Contact: Chris Chipello
Organization: Media Relations Office
Email:
Office Phone: 514-398-4201

Secondary Contact Information

Contact: Eric Galbraith
Organization: Department of Earth and Planetary Sciences
Office Phone: 514-398-3677
Category:
Source Site: /newsroom