Feeds

Melting Arctic leads to snowy winters

That missing iceberg is 12" deep on your driveway

Secure remote control for conventional and virtual desktops

Georgia Tech has lobbed a small grenade into the climate change debate, with a study suggesting a correlation between melting Arctic pack ice and snowy winters in the Northern Hemisphere.

The study, announced February 27, notes that above-average snow cover in the Northern Hemisphere has been measured each year since 2007 (when Arctic sea ice reached a record low level). During the 2009-2010 and 2010-2011 Northern Hemisphere winters, snow cover reached its second and third highest levels on record.

“Our study demonstrates that the decrease in Arctic sea ice area is linked to changes in the winter Northern Hemisphere atmospheric circulation,” said Judith Curry, chair of the School of Earth and Atmospheric Sciences at Georgia Tech. “The circulation changes result in more frequent episodes of atmospheric blocking patterns, which lead to increased cold surges and snow over large parts of the northern continents.”

The NASA- and NAS-supported research seeks to identify the mechanisms by which declining Arctic sea ice might influence winter weather conditions.

Georgia Tech researcher Jiping Liu said the research suggests that higher-than-usual sea ice melts in late Northern Hemisphere summers appears to be altering atmospheric currents – “weakening westerly winds, increasing the amplitude of the jet stream” – while at the same time lifting atmospheric moisture content.

Simulations run by the researchers also suggest that as the sea ice retreats, it results in surface warming in Greenland, north-eastern Canada, and the Arctic Ocean. This is matched by a corresponding surface cooling over Northern America, Europe, Siberia and eastern Asia, leading to above- average snowfall in those regions.

More simply: the moisture lost to the Arctic in the form of melting sea ice has to end up somewhere – and it appears to be falling as snow during the northern winter.

The Georgia Tech announcement says: “The consistent relationships seen in the model simulations and observational data illustrate that the rapid loss of sea ice in summer and delayed recovery of sea ice in autumn modulates snow cover, winter temperature and the frequency of cold air outbreaks in northern mid-latitudes.”

The research has been published in the Proceedings of the National Academy of Sciences. ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
SCREW YOU, Russia! NASA lobs $6.8bn at Boeing AND SpaceX to run space station taxis
Musk charging nearly half as much as Boeing for crew trips
Boffins say they've got Lithium batteries the wrong way around
Surprises at the nano-scale mean our ideas about how they charge could be all wrong
Thought that last dinosaur was BIG? This one's bloody ENORMOUS
Weighed several adult elephants, contend boffins
Europe prepares to INVADE comet: Rosetta landing site chosen
No word yet on whether backup site is labelled 'K'
India's MOM Mars mission makes final course correction
Mangalyaan probe will feel the burn of orbital insertion on September 24th
Cracked it - Vulture 2 power podule fires servos for 4 HOURS
Pixhawk avionics juice issue sorted, onwards to Spaceport America
City hidden beneath England's Stonehenge had HUMAN ABATTOIR. And a pub
Boozed-up ancients drank beer before tearing corpses apart
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.