Navigation Links
Satellite observes rapid ice shelf disintegration in Antarctic
Date:4/5/2012

One of the satellite's first observations following its launch on 1 March 2002 was of break-up of a main section of the Larsen B ice shelf in Antarctica when 3200 sq km of ice disintegrated within a few days due to mechanical instabilities of the ice masses triggered by climate warming.

Now, with ten years of observations using its Advanced Synthetic Aperture Radar (ASAR), Envisat has mapped an additional loss in Larsen B's area of 1790 sq km over the past decade.

The Larsen Ice Shelf is a series of three shelves A (the smallest), B and C (the largest) that extend from north to south along the eastern side of the Antarctic Peninsula.

Larsen A disintegrated in January 1995. Larsen C so far has been stable in area, but satellite observations have shown thinning and an increasing duration of melt events in summer.

"Ice shelves are sensitive to atmospheric warming and to changes in ocean currents and temperatures," said Prof. Helmut Rott from the University of Innsbruck.

"The northern Antarctic Peninsula has been subject to atmospheric warming of about 2.5C over the last 50 years a much stronger warming trend than on global average, causing retreat and disintegration of ice shelves."

Larsen B decreased in area from 11512 sq km in early January 1995 to 6664 sq km in February 2002 due to several calving events. The disintegration in March 2002 left behind only 3463 sq km. Today, Envisat shows that only 1670 sq km remain.

Envisat has already doubled its planned lifetime, but is scheduled to continue observations of Earth's ice caps, land, oceans and atmosphere for at least another two years.

This ensures the continuity of crucial Earth-observation data until the next generation of satellites the Sentinels begin operations in 2013.

"Long-term systematic observations are of particular importance for understanding and modelling cryospheric processes in order to advance the predictive capabilities on the response of snow and ice to climate change," said Prof. Rott.

"Climate models are predicting drastic warming for high latitudes. The Envisat observations of the Larsen Ice Shelf confirm the vulnerability of ice shelves to climatic warming and demonstrate the importance of ice shelves for the stability of glaciers upstream.

"These observations are very relevant for estimating the future behaviour of the much larger ice masses of West Antarctica if warming spreads further south."

Radars on Earth observation satellites, such as Envisat's ASAR, are particularly useful for monitoring polar regions because they can acquire images through clouds and darkness.

The Sentinel missions being developed as part of Europe's Global Monitoring for Environment and Security (GMES) programme will continue the legacy of radar observations.


'/>"/>

Contact: Robert Meisner
robert.meisner@esa.int
39-069-418-0874
European Space Agency
Source:Eurekalert  

Related medicine news :

1. NASA and other satellites keeping busy with this weeks severe weather
2. GOES-13 Satellite sees Groundhogs Day on ice
3. NASA satellite imagery keeping eye on the Gulf oil spill
4. Satellite Healthcare Celebrates World Kidney Day and National Kidney Month
5. High weight associated with risk of colorectal tumors without microsatellite instability
6. Satellite Healthcares Sheila Doss Elected Western Chapters Coordinator-Elect of the American Nephrology Nurses Association
7. New compound discovered that rapidly kills liver cancer
8. Rapid Flu Tests a Good First Step: Study
9. Rapid urbanization as well as cultural habits explain Gulf states rise in heart disease prevalence
10. Rapid Infant Growth Linked to Asthma in Study
11. New device for rapid, mobile detection of brain injury
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Satellite observes rapid ice shelf disintegration in Antarctic
(Date:1/21/2017)... Raton, FL (PRWEB) , ... January 21, 2017 , ... ... eRaiser, recently attended the January ECRM Trade Show in Hilton Head, SC, where it ... international reputation for the quality of its beauty and wellness products. At this trade ...
(Date:1/21/2017)... ... ... is the perfect set of tools for video editors that want to create the illusion ... - CEO of Pixel Film Studios. , Video editors using ProDOF can add realistic ... racking focus from one area into the next. ProDOF comes with 0.5 second, 1.0 ...
(Date:1/21/2017)... ... January 21, 2017 , ... Phytocéane invites ... isolated from the rest of the world with ZANZIBAR SHOWER GEL. Inspired by the ... key ingredients, Virgin Coconut Oil and moisturizing vegetal coral to create this gentle, crystal-clear ...
(Date:1/21/2017)... ... January 21, 2017 , ... ... Family Dermatology has recently joined their multi-specialty medical group. The dermatology practice ... cosmetic services. , “We’re excited to add this excellent dermatology practice to our ...
(Date:1/21/2017)... ... January 21, 2017 , ... In the United States, 20 ... the freedom of recovery, they often feel shame for having struggled with an eating ... (PTSD). In the workshop, “Rising Strong in Life After an Eating Disorder” -- to ...
Breaking Medicine News(10 mins):
(Date:1/19/2017)... Jan. 19, 2017 Report Details ... Which areas are going to grow at the fastest ... 2026, assessing data, trends, opportunities and prospects. Our ... the most lucrative areas in the industry and the ... forecasted sales across the all the major categories of ...
(Date:1/19/2017)... SILVER SPRING, Md. , Jan. 19, 2017 ... for the treatment of Chronic Idiopathic Constipation (CIC) in adult ... patients suffering from chronic gastrointestinal disorders," said Julie Beitz ... in the FDA,s Center for Drug Evaluation and Research. "With ... select the most appropriate treatment for their condition." ...
(Date:1/19/2017)... Jan. 19, 2017 Report Details ... Alzheimer,s ... Leading Companies – our new study reveals trends, R&D ... and events affecting the Alzheimer,s disease therapeutics and diagnostics ... these key questions: - How is the Alzheimer,s disease ...
Breaking Medicine Technology: