Taxonomy term

arctic

Arctic humidity on the rise

As the Arctic warms and sea ice melts, scientists suspect that system feedback cycles may further speed up the warming process. Now, a new study looking specifically at the Arctic water vapor cycle shows how shifting patterns of humidity may bring about changes in the Arctic atmosphere.

07 Oct 2012

U.S. Navy navigates a sea change in the Arctic

Arctic sea ice is already significantly declining in both extent and thickness, and impacts of the decline are evident. New shipping lanes in the Northwest Passage have been passable for ship traffic during summer months for the last two years, and an increasingly accessible Arctic is attracting increased interest. Shipping companies, entrepreneurs, scientists and tourists, however, are not the only ones looking north; militaries around the world, including the U.S. Navy, also have an interest. To that end, the Navy has created a task force and employed a corps of geoscientists to help develop a roadmap for expected future Arctic operations.

16 Apr 2012

IceGoat: The next generation

One source of young talent to carry the military’s proposals and technologies into the future will come from the U.S. Naval Academy in Annapolis, Md., where Lt. Cmdr. John Woods, an oceanography professor, specializes in sea-ice studies. Woods recently launched a polar science program, supported by the academy’s STEM Office, which he hopes will convey to students an understanding of sea-ice dynamics — how ice is thinning and what’s causing it to thin.

16 Apr 2012

CryoScoop: A must-read special issue

Arctic enthusiasts: check out the Oct. 13 issue of Nature. The special issue “After the Ice” examines a variety of hot topics in the Arctic, where global warming continues to impact the landscape, science and economics.

13 Oct 2011

CryoScoop: Sea ice synopsis and a whale tale

The extent of Arctic sea ice shrinks each year during the northern hemisphere’s spring and summer, trading a white frozen surface for dark open ocean. Reaching its lowest annual extent by September or October, the ice grows back again through the cold and dark winter months.

30 Sep 2011

The impact at El'gygytgyn crater

Moment of impact: As the asteroid hits the ground with a velocity of several tens of kilometers per second, a shock wave is generated that penetrates radially into the ground and compresses the rocks.

Contact/compression stage
Christian Koeberl, University of Vienna

 

 

 

 

 

 

 

 

20 Jul 2010

Early results

Although our final results won’t begin to be published until early next year, our team met in May to review all the data we had collected so far.

We had drilled several types of cores. Our initial pilot cores, taken in 1998 and 2003, provided proof of concept, demonstrating the importance of these cores as a climate record, as they contain climate data that extend back in time 300,000 years — roughly three times longer back in time than the oldest portions of the Greenland ice core records.

20 Jul 2010

The thrill to drill in the chill

Nearly 3.6 million years ago, a large asteroid slammed into Earth in what is today northeastern Russia. Within minutes, the impact formed an 18-kilometer-wide hole in the ground that then filled with water.

20 Jul 2010

Seal missing link found in the Arctic

A newly discovered web-footed mammal may be a “missing link” between land-based and marine pinnipeds, a group that includes seals, walruses and sea lions. The find, occurring on the 150th anniversary of Charles Darwin’s "On the Origin of Species," may shed new light on the land-to-sea animal evolutionary theory.

24 Apr 2009

Earth: The movie (not the magazine)

Blogging on EARTH (the magazine)

Earth Day is over. But you don’t have to wait until next year to celebrate the planet. Disney’s new movie “Earth,” which opened Apr. 22, offers some spectacular views of the planet and its inhabitants.

23 Apr 2009

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