Thickest Arctic Sea ice melting much faster
Washington: The oldest and thickest Arctic Sea ice is melting much faster than the younger and thinner ice at the edges of the Arctic Ocean`s floating ice cap, an alarming new NASA study has revealed.
The thicker ice, known as multi-year ice, survives through the cyclical summer melt season, when young ice that has formed over winter just as quickly melts again.
The rapid disappearance of older ice makes Arctic sea ice even more vulnerable to further decline in the summer, said Joey Comiso, senior scientist at NASA Goddard Space Flight Centre, Greenbelt, who authored the study, the Journal of Climate reported.
The new research takes a closer look at how multi-year ice, that has made it through at least two summers, has diminished with each passing winter over the last three decades, according to a university statement.
Multi-year ice "extent" -- which includes all areas of the Arctic Ocean which covers at least 15 percent of the ocean surface -- is diminishing at a rate of 15.1 percent per decade, the study found.
Sea ice area is always smaller than sea ice extent, and it gives scientists the information needed to estimate the total volume of ice in the Arctic Ocean.
Comiso found that multi-year ice area is shrinking even faster than multi-year ice extent, by 15.1 percent per decade.
"The average thickness of the Arctic sea ice cover is declining because it is rapidly losing its thick component, the multi-year ice. At the same time, the surface temperature in the Arctic is going up, which results in a shorter ice-forming season," Comiso said.
"It would take a persistent cold spell for most multi-year sea ice and other ice types to grow thick enough in the winter to survive the summer melt season and reverse the trend," Comiso concluded.
More from India
More from World
More from Sports
More from Entertaiment
- PM Modi speaks at Golden Jubilee celebrations of poet Dinkar’s works
- Vadodara: Policemen seen dancing with bar girls
- Coal scam: Naveen Jindal, Madhu Koda and others get bail
- Zee Media Exclusive: Kangana, Madhavan talk about their film 'Tanu Weds Manu Returns'
- DNA: IAF Mirage 2000 fighter plane lands successfully on Yamuna expressway
- One year of Modi govt: Arun Jaitley addresses press conference
- DNA: Osama documents show 'Indian brother in Madinah' financed al Qaeda
- DNA: Harmful chemicals found in Maggi, Nestle India still in denial mode
- ISIS executes Syrian fighter using anti-tank rocket launcher
- CM Kejriwal shortlists 39 'unwanted' IAS officers in Delhi
- Zee Media Exclusive interview with Congress leader Kamal Nath
- Columbia student takes rape-protest mattress to graduation
- Mumbai: One injured in shootout at Film City
- DNA: Modi-led NDA govt's hits and misses in one year
- Delhi: Car catches fire after crash, one dead
- Jayalalithaa makes public appearance, meets Governor: As it happened
- IPL 2015, Qualifier 2: CSK vs RCB - As it happened...
- India to soon have its own space shuttle!
- Kejriwal slams notification on LG's powers, says Modi running Delhi govt through back door
- Tanu Weds Manu Returns movie review: Brilliant execution, superb performance!
- Manohar Parrikar meets troops at Siachen base camp
- Wbbse.org 10th Madhyamik Pariksha Results 2015: West Bengal Board (wbresults.nic.in) Class 10th, WB MP Results 2015 to be announced today shortly
- Businessman shot next to Amitabh Bachchan's shooting location in Mumbai Film City
- Rahul Gandhi to pressurise govt to act on one-rank-one-pension issue
- PM Narendra Modi graces Digvijay Singh's son wedding reception
- West Bengal Board (wbbse.org & wbresults.nic.in) Class 10th Madhyamik Pariksha (MP) Results 2015 to be announced today at 10 AM
- Rajasthan Board RBSE 12th Inter Results 2015: BSER Ajmer (rajeduboard.nic.in & rajresults.nic.in) Senior Secondary Class 12th Science & Commerce Exam Results 2015 to be declared today at 2 PM
- RBSE 12th Results 2015 (rajeduboard.nic.in & rajresults.nic.in): Rajasthan Board BSER Ajmer Senior Secondary Class 12th XII Intermediate Science & Commerce Exam Results 2015 to be declared today on May 22
- After land bill, net neutrality, Rahul Gandhi to fight for ex-servicemen now
- SC asks Haryana Police to quickly finish AIPMT paper leak probe