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:4/21/2017)... ... , ... Providing broad access to life-saving drugs and rewarding the innovators who ... to address this problem. , That was the message from Dana Goldman, PhD, Leonard ... University of Southern California, who served as the keynote speaker for Western University of ...
(Date:4/21/2017)... ... April 21, 2017 , ... Evoke ... young adults, has kicked off its 4th annual Forum for Innovative Treatment Solutions ... is “Attachment Informed Therapy for Mental Health and Addiction.” , FITS’ 2017 ...
(Date:4/21/2017)... ... April 21, 2017 , ... The adage “Show, don’t ... the next project in the company’s esteemed VISION House demonstration project series. Manifesting the ... the amount of resources they need to live affordably and abundantly without unduly taxing ...
(Date:4/21/2017)... ... April 21, 2017 , ... Crossover Symmetry , ... , an active lifestyle company that provides Human Performance Training and education to ... offers, first responders, military officers and others in service through the development and ...
(Date:4/21/2017)... ... April 21, 2017 , ... Northern California Medical ... Care Spring Symposium on April 1, 2017 in Santa Rosa. This well-attended annual ... healthcare providers an opportunity to learn about cutting edge treatments, to collaborate, share ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... 2017 /PRNewswire/ - CRH Medical Corporation (TSX: CRH) (NYSE MKT: CRHM) (the "Company"), ... Healthcare Investor Conference 2017 at the Sheraton Hotel in ... Executive Officer of the Company is scheduled to present on Tuesday, ... and the Chairman of the Board, Tony Holler ... ...
(Date:4/19/2017)... 2017 Global Surgical Drainage Device Market: Overview ... to remove excess liquid and air. The fluid to ... or lymph. Surgical drains are used in a wide ... surgery, cardiovascular surgery, neurosurgery, plastic surgery etc. Common use ... accumulation of fluid e.g. blood or pus. Surgical drains ...
(Date:4/19/2017)... 19, 2017  Sorrento Therapeutics, Inc. (NASDAQ: ... company developing new treatments for cancer and other ... its previously announced underwritten public offering of 23,625,084 ... offering price of $2.00 per share, before deducting ... payable by Sorrento.  The net proceeds to Sorrento ...
Breaking Medicine Technology: