Rapid Arctic warming has in the past shifted Southern Ocean winds

ScienceDaily | 1/10/2017 | Staff
Click For Photo: https://images.sciencedaily.com/2017/01/170110101622_1_540x360.jpg

A dramatic pattern in our planet's climate history involves paroxysms in Arctic temperatures. During the last ice age, tens of thousands of years ago, Greenland repeatedly warmed by about 10 degrees Celsius over just a few decades and then gradually cooled. Meanwhile the Southern Hemisphere climate stayed fairly stable, with only weak and long-delayed echoes of the temperature chaos up north.

But new University of Washington research shows the fierce winds circling Antarctica -- an important lever on the global climate -- shifted quickly in response to the Northern Hemisphere temperature spikes.

Changes - Northern - Hemisphere - Southern - Hemisphere

"It's most surprising that we can see these really abrupt changes in the Northern Hemisphere making it very quickly to the Southern Hemisphere," said first author Bradley Markle, a UW doctoral student in Earth and space sciences. "The atmospheric circulation is tightly connected across the globe during these events."

The study is published in the January issue of Nature Geoscience.

Researchers - Evidence - West - Antarctic - Ice

Researchers used evidence from a 2-mile-long West Antarctic ice core. That ice core's thick annual layers provide precise dating that allows scientists to match its climate history with those in distant Greenland ice records. The wild northern temperature swings, known as Dansgaard-Oeschger events, are thought to be natural oscillations in the climate system. They have been reproduced in the most sophisticated climate models covering the ice age period. These same models also show a shift in Southern Hemisphere winds.

The new study is the observational support for this shift in the winds.

Antarctic - Ice - Core - Southern - Ocean

The Antarctic ice core shows that Southern Ocean winds shifted at the same time, or at most within a few decades, of each rapid Greenland warming event. Antarctic air temperatures, on the other hand, are connected through the slower-moving oceans and took about two centuries to respond.

"We'd never found anything in our ice cores before that show the Southern Hemisphere responding so...
(Excerpt) Read more at: ScienceDaily
20 other people are viewing this story
Wake Up To Breaking News!
Governemnt sponsored segratation of America, one household at a time.
Tagged:
Sign In or Register to comment.

Welcome to Long Room!

Where The World Finds Its News!

LongRoom Culture
Knife Cutting Through Wood Like Butter! Wood carving takes very sharp tools!  This carver shows how he is holding the spoon in...
Man Jumps From Trampoline Into A Giant Inflated Bubble Ball! Complete with somersault, this man jumps from the trampoline to...
Dog Runs Along The Beach With Kite Boarder! It doesn't look like this kite boarder expected to have such close company on his...
Waterfall Unable to "Fall" Due To High Winds! Unusual video of a waterfall that is being blown by the wind so severely that it...
Little Cowboy Learning Calf Roping At Just The Right Age! When the calf breaks out of the chute, this little cowboy is ready.
Dog Shadows Every Move That His Owner Makes! This dog couldn't be happier than to make every move that his owner makes at the...
Fun Physics Tricks You Can Try At Home! These physics tricks are great experiments to try at home just for fun! Here's another...
Life Hacks That Will Help You Organize Your Clothes! This collection of tips and tricks in organizing your closet and drawers...
Cat Can Play Shell Game Flawlessly! This con game does not con this cat who can pick the right cup everytime!  The cat would be...
Mother Grizzly Carries Her 2 Cubs Across River On Her Back! This touching video shows a mother grizzly swimming across the...
Darwin's Bark Spider Has Real "Spidey" Power And Builds Bridge Over 80 Feet Long! This spider is able to extrude a strand of...
Dance Meets Light Show - Light Balance Dancers at America's Got Talent 2017! This dance routine is amazing. It is...
Mouse Doesn't Let Being Upside Down and Under His Running Wheel Stop Him From Getting a Good Run In! Something is not right in...
One Cat Finds That Another Cat is Using Him As A Chair! The look on this cat's face is as though he is saying "You can't be...
Kite Surfers Setting World Record! It took a lot of kite surfers to make this video and some very exacting  and exciting riding.
Zombie Raccoon Apocalypse! This video could be straight out of a Zombie Raccoon Apocalypse movie, or just a quiet neighborly...
Man Kayaking Is Surprised By Surfacing Whales! This man is at the right place at the right time.  He must have noticed the...
Beautiful Huge, Cecropia Moth! The Largest Moth in North America! If you ever see one of these moths, you will be impressed...
Adorable Ragdoll Cats Gandalf and Flame Ride Atop A Robot Vacuum Cleaner! These cats are so cute and seem to be content to clean...
Heidi The Australian Shepherd Fetches Her Bed And Settles Down To Watch Planet Earth! This beautiful dog has a very interesting...
Slow Motion Video of Balloon Being Punctured Underwater! Bursting a balloon underwater makes an impressive special effect when...
Amazing Score By Little League Player! When you are running for home and the catcher is waiting there with the ball to tag you,...
Bird Surfs Down Snow Covered Roof, Grabs His "Surfboard," Flies Back Up To The Roof Ridge And Surfs Down Again!
Three Human Kaleidoscope! Brilliant synchronized hand motions that imitate the images you see in a kaleidoscope!  This is very...
One Little, Two Little...Wait... Three Little Kittens All Stretching! It only looks there are two kittens in this container...
Cat Is Rude and Keeps Scratching Sheep's Face, Then Sheep Gets Even! A few rather innocent sniffs and this sheep gets scratched...
Dog Caught Stealing a Bread Roll! Roll?  What Roll?  Oh, you mean this roll...  This dog is so adorable after being caught in...