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Satellites discover new Arctic islands. (Earth Science).

Imagine the thrill of exploring Arctic regions, discovering new lands, and staking a claim on history--all without risking frostbite frostbite (chilblains), injury to the tissue caused by exposure to cold, usually affecting the extremities of the body, such as the hands, feet, ears, or nose. Extreme cold causes the small blood vessels in the extremities to constrict. .

Danish researchers did just that when they analyzed a series of radar observations of the area that includes Tobias Island, located about 75 kilometers off the northeastern coast of Greenland. The islet islet /is·let/ (-lit) an island.

islets of Langerhans  irregular microscopic structures scattered throughout the pancreas and comprising its endocrine portion.
 was discovered in 1993 by German scientists conducting research on Greenland's continental shelf. The island hadn't been found before that time because of its remote location, an unwelcoming girdle girdle /gir·dle/ (gir´d'l) cingulum; an encircling structure or part; anything encircling a body.

pectoral girdle  shoulder g.
 of permanent sea ice, and a frequent cloak of fog and clouds, says Rene Forsberg of the Danish National Survey in Copenhagen.

By taking precise altitude readings from satellites passing over the area and combining those measurements into an image--a technique known as interferometry--the Danish scientists looked for areas that didn't move. Even though the ocean around Tobias Island was frozen solid, the satellite could distinguish between land and water because sea ice rises and falls Rise and Fall redirects here. For the Belgian hardcore band, click here.

Rises and falls is a category of the ballroom dance technique that refers to rises and falls of the body of a dancer achieved through actions of knees and feet (ankles).
 with the tides. It was Tobias Island's stillness that gave it away. Forsberg and Johan J. Mohr found that the land mass is about 2 km long--much larger than originally reported--and rises above the ice about 35 meters. They report their findings in the March 7 Nature.

The same interferometry images revealed a group of smaller islands about 10 km to the southeast of Tobias Island. These islets appear to be about 1 km across, but the radar data didn't have the resolution to determine how many islands there are in the group, says Forsberg. This May, scientists will fly to the region to conduct an aerial survey Aerial survey is a geomatics method of collecting information by utilising aerial photography or from remote sensing imagery using other bands of the electromagnetic spectrum, such as infrared, gamma, or ultraviolet.  of the newfound new·found  
Recently discovered: a newfound pastime.

Adj. 1. newfound - newly discovered; "his newfound aggressiveness"; "Hudson pointed his ship down the coast of the newfound sea"
 islands. On that trip, no doubt, they'll need gloves and warm clothing. --S.P.
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Publication:Science News
Article Type:Brief Article
Geographic Code:0ARCT
Date:Apr 6, 2002
Previous Article:A tasty discovery about the tongue. (Biomedicine).
Next Article:Stone Age Siberians move up in time. (Archaeology).

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