is arctic sea ice doomed to disappear
Last Updated : GMT 05:17:37
Emiratesvoice, emirates voice
Emiratesvoice, emirates voice
Last Updated : GMT 05:17:37
Emiratesvoice, emirates voice

Is Arctic sea ice doomed to disappear?

Emiratesvoice, emirates voice

Emiratesvoice, emirates voice Is Arctic sea ice doomed to disappear?

There's good news and bad news for polar bears
Paris - AFP

There's good and bad news for people, and polar bears, threatened by the Arctic's vanishing sea ice, scientists said Monday.
First the good news: summer ice cover is "virtually certain" to survive if average global warming does not rise more than 1.5 degrees Celsius (2.7 degrees Fahrenheit) above pre-industrial era levels, according to a study published in the journal Nature Climate Change.
"We estimate there is less than a 1-in-100,000 chance of an ice-free Arctic if global warming stays below 1.5 C," James Screen and Daniel Williamson from the University of Exeter wrote.
That should come a relief to indigenous peoples whose way of life, and livelihood, depend on ice persisting through the summer months. Already today, their houses are literally falling into the sea.
For polar bears, the stakes are even higher, experts say. 
With their total population reduced to around 26,000, polar bears would struggle to survive without the floating ice platforms from which they hunt seals and other prey.
On a global scale, several million square kilometres (miles) of white snow and ice reflect most of the solar radiation that hits it back into space. 
Replace this giant mirror with deep blue ocean, and that heat gets absorbed instead, accelerating climate change.
Why a 1.5 C temperature limit? 
That is the "aspirational" goal laid down in the 196-nation Paris climate pact, along side a hard target of under 2 C (3.6 F), long identified as the guardrail for dangerous warming.
A 2 C rise would give humanity a coin-toss chance -- "about as likely as not" -- of keeping the North Pole white, Williamson and Screen reported.
The researchers compared different climate models of sea ice loss with actual changes over the last decade, using only those that provided the best match for their projections.
Despite year-to-year fluctuations, long-term trends in the Arctic are unmistakable: the 10 lowest ice extents since 1979 -- when satellite data began -- have all occurred since 2007.
The record low of 3.41 million square kilometres (1.32 million square miles) in 2012 was 50 percent less than the 1979-2000 average.
- Twice the global average -
A 1.5 C cap means ice cover would rarely dip below this level, the researchers said. 
Sea ice today covers about 14 million square kilometres at its winter maximum, and five million at its summer minimum.
Without deep cuts in greenhouse gas emissions, the Arctic could see its first ice-free summers within two or three decades.
So far, the Arctic's surface temperature has gone up by more than 2 C -- twice the global average.
But the bad news is that even if scientists are confident a 1.5 C ceiling will, in theory, preserve Arctic ice, they are far less sure this goal can be achieved.
"Currently, we only have a few scenarios that get us there, and they are outliers," Valerie Masson-Delmotte from the Pierre Simon Laplace Institute in Paris told fellow climate scientists gathered in Oxford last fall to discuss the 1.5 C target.
All but a few, in other words, of the hundreds of complex computer models plotting the rapid reduction of greenhouse gases that drive climate change zoom right past that benchmark.
Waiting for the water to freeze 
"We may see the first year of 1.5 C above pre-industrial levels within a decade," Richard Betts, head of climate impacts research at the Met Office Hadley Centre in England, told the same conference.
On current trends, Earth is on track to heat up by about 3 C (5.4 F) by the end of the century.


Source: AFP

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

is arctic sea ice doomed to disappear is arctic sea ice doomed to disappear

 



Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

is arctic sea ice doomed to disappear is arctic sea ice doomed to disappear

 



GMT 09:54 2018 Wednesday ,24 January

'Friendly and kind' N. Korean skaters

GMT 11:03 2018 Tuesday ,23 January

No end to eyesores at Taj Mahal

GMT 05:43 2017 Tuesday ,05 September

Israeli settlements take unprecedented dimensions

GMT 23:10 2017 Friday ,06 October

International Community needs to step up efforts

GMT 12:00 2011 Wednesday ,08 June

London on the road to a cleaner, low-carbon future

GMT 22:39 2014 Saturday ,01 November

Kerry meets top Palestinian official Monday

GMT 11:44 2012 Tuesday ,10 April

The History of English Poetry

GMT 18:18 2012 Saturday ,31 March

Gifted pupils often suffer

GMT 11:20 2012 Thursday ,14 June

Hamas \'left behind\' by Arab Spring

GMT 14:34 2016 Monday ,14 November

VW: Audi software can distort emissions in tests

GMT 10:08 2011 Monday ,27 June

Ancient articles of faith: Catholic antiquities

GMT 15:36 2014 Wednesday ,01 October

Ai Weiwei meditates on freedom in Alcatraz

GMT 06:52 2015 Sunday ,11 January

Serena Williams off to frustrating start in 2015

GMT 20:30 2012 Monday ,25 June

Al-Sheikh wal Tabib

GMT 01:19 2016 Wednesday ,08 June

Verizon 'plans Yahoo bid'

GMT 10:38 2017 Saturday ,01 July

Manny-Floyd rematch possible

GMT 22:38 2017 Friday ,17 February

Investment promotion would be Sahar Nasr's main task

GMT 20:51 2017 Tuesday ,16 May

Singer Fares Karam refuses to be honored

GMT 19:13 2011 Thursday ,10 November

Malaria could be stopped by blocking cell path

GMT 15:49 2017 Sunday ,21 May

Saudi king slams Iran as spearhead
Emiratesvoice, emirates voice
 
 Emirates Voice Facebook,emirates voice facebook  Emirates Voice Twitter,emirates voice twitter Emirates Voice Rss,emirates voice rss  Emirates Voice Youtube,emirates voice youtube  Emirates Voice Youtube,emirates voice youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

emiratesvoieen emiratesvoiceen emiratesvoiceen emiratesvoiceen
emiratesvoice emiratesvoice emiratesvoice
emiratesvoice
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
emiratesvoice, Emiratesvoice, Emiratesvoice