HOME >> BIOLOGY >> NEWS
B-15A iceberg's close encounter monitored by Envisat

ging Spectrometer (MERIS) instrument (View the full animation - Windows Media Player, 3Mb).

The animation then moves four months back in time to illustrate the break-up of the original, larger B-15A (the current B-15A having inherited its name), split asunder by storms and currents while run aground on Ross Island, as observed by repeated ASAR observations. The animation ends with a combined MERIS/ASAR panorama across Victoria Land, including a view of the the Erebus ice tongue, similar to B-15A's potential 'victim', the Drygalski ice tongue.

As the animation shows, ASAR is extremely useful for tracking changes in polar ice. ASAR can peer through the thickest polar clouds and work through local day and night. And because it measures surface texture, the instrument is also extremely sensitive to different types of ice so the radar image clearly delineates the older, rougher surface of ice tongues from surrounding sea ice, while optical sensors simply show a continuity of snow-covered ice.

"An ice tongue is 'pure' glacial ice, while the surrounding ice is fast ice, which is a form of saline sea ice," Drinkwater says. "To the radar there is extreme backscatter contrast between the relatively pure freshwater ice tongue which originated on land as snow and the surrounding sea ice, due to their very different physical and chemical properties."

The Drygalski ice tongue is located at the opposite end of McMurdo Sound from the US and New Zealand bases. Large and (considered) permanent enough to be depicted on standard atlas maps of the Antarctic continent, the long narrow tongue stretches 70 kilometres out to sea as an extension of the land-based David Glacier, which flows through coastal mountains of Victoria Land.

Measurements show the Drygalski ice tongue has been growing seaward at a rate of between 50 and 900 metres a year. Ice tongues are known to rapidly change their size and shape and waves and storms weaken their ends
'"/>

Contact: Mariangela D'Acunto
mariangela.d'acunto@esa.int
39-069-418-0856
European Space Agency
19-Jan-2005


Page: 1 2 3 4

Related biology news :

1. New collision looks imminent for B-15A iceberg
2. New textbook illuminates the close links between evolutionary and molecular biology
3. Scientists move closer to bio-engineered bladders
4. Faster-acting antidepressants closer to becoming a reality
5. Scientists a step closer to understanding how anaesthetics work in the brain
6. Scientists close in on missing carbon sink
7. New mouse model closely mimics human cancers
8. A close-up on pancreatic disease: How do we improve the odds?
9. Cure for cancer one step closer
10. Bony vertebrate evolution: Elephant sharks closer to humans than teleost fish
11. MIT device draws cells close -- but not too close -- together

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


(Date:8/3/2020)... PHOENIX (PRWEB) , ... August 03, 2020 , ... ... the company announced a new partnership with medical equipment manufacturer, Spectrum Solutions, to ... its clients to strengthen their laboratory supply chain for more than 10 years. ...
(Date:7/31/2020)... ... July 30, 2020 , ... Justin Zamirowski ... with a near term focus on Type 2 diabetes and associated comorbidities. , ... multiple therapeutic areas and classes. As Chief Commercial Officer, Justin will lead ...
(Date:7/18/2020)... (PRWEB) , ... July 16, 2020 , ... ... that demonstrates the effectiveness of the Invictus Medical Neoasis™ active noise control device ... The study reported that the Neoasis™ device attenuated the alarm sounds from patient ...
Breaking Biology News(10 mins):
(Date:7/10/2020)... ... July 09, 2020 , ... Sentien Biotechnologies, Inc., a clinical-stage ... Allen R. Nissenson, M.D., F.A.C.P., as its Chief Medical Officer. Dr. Nissenson ... product, SBI-101. Dr. Nissenson serves as an Emeritus Professor of Medicine at ...
(Date:7/7/2020)... ... July 06, 2020 , ... Bio-IT World has announced the ... Squibb, the University of Chicago, Massachusetts General Hospital, Mission: Cure, and the Pistoia ... program, highlighting outstanding examples of how technology innovations and strategic initiatives can be ...
(Date:7/1/2020)... ... June 29, 2020 , ... The Interlocal Purchasing ... to its membership, recently named BioFit Engineered Products an Awarded Vendor. ... purchase ergonomic seating, cafeteria tables, book trucks and carts at discounted pricing without ...
(Date:6/28/2020)... NIGUEL, Calif. (PRWEB) , ... June 25, 2020 , ... ... announced the launch of Safe Space™ for businesses of all types to ensure cleanliness, ... 3D LiDAR. , A Safe Space™ enabled business will provide a health ...
Breaking Biology Technology:
Cached News: