Social Media Sidebar


Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

Just because something doesn’t do what you planned it to do doesn’t mean it’s useless.


Thomas Edison

Arctic sea ice may be thinning faster than scientists initially predicted

Posted in Science on 6th Nov, 2017 05:53 PM by Alex Muller
Scientific predictions that foresaw the first ice-free Arctic Ocean in the summertime occurring between 2040 and 2050 may come to pass even sooner, according to Vishnu Nandan, Geography Eyes High doctoral candidate and lead author of the study, published in Geophysical Research Letters.
Nandan and his co-authors found that satellite estimates for the sea ice thickness of seasonal ice (one-year-old ice) have been overestimated by up to 25 per cent due to the saline properties of snow cover on top of the ice, affected the accuracy of satellite readings. As such, that ice can likely be expected to melt earlier than projected.
The study calls into question measurements provided over the past decade by the European Space Agency’s satellite, CryoSat-2, which has been the most prominent satellite measuring Arctic sea ice thickness.
“It has been assumed by the scientific community that CryoSat-2 can accurately measure the sea ice freeboard, which is the ice we can see above sea level,” says Nandan. “But that ice is covered in snow and the snow is salty close to where the sea ice surface is. The problem is, microwave measurements from satellites don’t penetrate the salty snow very well, so the satellite is not measuring the proper sea ice freeboard and the satellite readings overestimate the thickness of the ice.”
To compensate for the inaccuracy of the satellite readings, Nandan and his co-researchers — including University of Calgary geography professors John Yackel and Brent Else, as well as researchers from Victoria, Toronto, Germany and France — devised a correction factor that takes into account the snow salinity. This involves a combination of microwave theory and over 10 years of snow property data in the Canadian Arctic.
Previous to this study, it had been understood that since 1979 the volume (or thickness) of that ice has been declining at a rate of 17 per cent per decade. According to the new research however, the rate of summer sea ice decline could be slightly faster.  
The consequences of ice-free summers in the Arctic Ocean would be enormous. “Such a transition would radically affect global weather patterns and dramatically increase the magnitude and frequency of storm events,” says Yackel. “It would also dramatically alter the Arctic marine ecosystem, with the added sunlight affecting the Arctic Ocean food web and melting the very ice bed on which animals like polar bears hunt.”

Tags: iceclimateresearchclimate change

Read original article » Back to category



Recent headlines

  • Posted in Software on 2018-10-19 11:09:41
    Idx raises $33 million for AI that detects eye more
    Posted in Software on 2018-10-19 11:07:05
    University of Florida’s AI finds early lung cancer more
    Posted in Science on 2018-10-19 11:02:34
    Lunar landscape testing ground to be built in more
    Posted in Hardware on 2018-10-18 18:16:43
    Swedish company Ovzon is the fourth client for more
    Posted in Medicine on 2018-10-18 17:52:40
    Enzyme to help smokers quit by eliminating nicotine more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs, more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target more

Recent Blog Posts

  • Posted by AlexMuller
    Even light drinking increases risk of more
    Posted by AlexMuller
    Researchers have discovered how to slow more
    Posted by AlexMuller
    Human retinas grown in a dish explain how color vision more
    Posted by AlexMuller
    The smartphone app that can tell you’re depressed before more
    Posted by AlexMuller
    Neural networks don’t understand what optical illusions more

Login to your Account

Login to your PlanetTech Account here

Remember me

Create a New Account

You just need username and password

The following errors occured:
Verify password:
Remember me