News / Science & Technology

Global Warming Slowdown Trapped in Ocean

General view of beach shows breaking waves along the ocean beach front in Biarritz on the southern Atlantic Coast of France, Feb. 6, 2014. Global warming is in a temporary hiatus, in part because of heat absorbed deep into the Atlantic and Southern oceans.
General view of beach shows breaking waves along the ocean beach front in Biarritz on the southern Atlantic Coast of France, Feb. 6, 2014. Global warming is in a temporary hiatus, in part because of heat absorbed deep into the Atlantic and Southern oceans.
Rosanne Skirble

A climate change mystery is coming into sharper focus.

A new study released in the journal Science explains why despite the rise of heat-trapping gases in the atmosphere, global warming has slowed over the last 15 years. Some scientists point to the cooling effect of volcanoes or changes in solar activity.  

Lead author and University of Washington applied mathematics professor Ka Kit Tung suggests massive movement of heat from shallow to deep regions of the ocean is responsible.

“From the energy standpoint, the warming does not just warm the surface. It should warm the whole ocean column," said Tung. "There is evidence that the integrated temperature of the whole ocean column has been increasing even through the current period of pause.”

Global warming heat stored in Atlantic, Southern oceans

Ninety-three percent of the excess heat caused by global warming gases is stored in the oceans. Tung used underwater sensors to measure the temperature at various depths in the water column over the last three decades of the 20th century. Climate models indicated that the Pacific Ocean was hiding the heat.

But observations showed the heat is sinking deep in the Atlantic and Southern Oceans, part of a natural 30-year cycle. Tung said the current phase, with cooler temperatures at the ocean surface, started in 1999 when the rapid warming of the last century slowed down. “And we are currently in the middle of this 30-year period where more heat is going into the ocean, Tung said, “That’s why what [heat] remains near the surface has not been much, not much warming.”    

Salty seawater triggers heat migration into ocean depth

Tung's study finds that the excessive heat now stored in the ocean depths moves like a conveyor belt between the north and south poles. The warm water becomes saltier as it travels through the subtropics because there is more evaporation of surface water at those latitudes.

Salty seawater is heavier and sinks, making the sea surface - and the air above it - cooler. Tung said that accounts for the warming pause we’re experiencing now. Temperatures will rise, however, when the ocean cycle flips to its warm phase. “The rate of surface temperature increase will be just as high, or even higher, than what we experienced in the last three decades of the 20th century. But the actual temperature that it starts with is now the highest temperature, but it is going to go up very rapidly. So the next phase of accelerated warming is going to be very damaging.”

The current global warming slowdown, Tung predicts, could last a decade or longer.

 

 

You May Like

Italian Red Cross Chief: Don't Label Migrants 'Illegal'

Speaking at the United Nations headquarters in New York Wednesday Francesco Rocca says migrants are victims, not criminals More

US Intel Officials Cautious About New IS Threat

Threat, said to have been posted by alleged American member of Islamic State terror group, says Sunday’s attack in Texas ‘is only the beginning’ More

Eyes in Sky Monitor Weather, Predict Epidemics

Satellites track storms, population movements, ocean warming to predict disease conditions More

This forum has been closed.
Comment Sorting
Comments
     
by: Science Officer from: Earth
August 22, 2014 1:59 PM
Odd, the rate of sea level rise has slowed, commensurate with the "pause" in atmospheric temperatures. You'd think all the heat in the oceans would make them expand and sea levels would rise faster. Now we have another mystery to solve

by: Asok Smith
August 21, 2014 10:07 PM
I'm confused. I thought the "science" was settled.
In Response

by: Terry from: Western us
August 23, 2014 2:39 AM
I get tired of hearing the debate about climate change is settled. No "theory" that continually does not produce the projected results is settled. Every time things don't go the way the alarmists project they produce another theory as to why. They said themselves in this report that the earth goes through cycles of temperature fluctuation that can last up to 70 years. That meanes the last 100 years of warming, minus the last 15 years it didn't warm could be a natural cycle. We need to be good stewards of our planet but not destroy our economy based on unproven theory.
In Response

by: ReduceGHGs from: Oregon
August 22, 2014 11:08 AM
The science regarding the core issue is settled; Humans are warming the planet and the consequences are not good. To avoid confusion read what the experts have been saying for years. Google: NASA Climate Change Consensus

by: BigBob from: USA
August 21, 2014 9:13 PM
The big run-away green house is just a scare tactic to scare dumb weak minded folk to vote for surrendering extremely large amounts of tax money to greedy university profs. and other dishonest government officials. If you only knew the funds these greedy swindlers took in. Don’t forget crony capitalism like Solarendra and GE. Have a big green time while they suck green dollars from your pockets. One of the heads of IPCC Dr. Michael Mann and colleagues had all their top secret emails flooded into public domain where all could see the giant scam. You would think it would have been the end of the issue. But no! Way too much money to be made yet. Liberals run the government and liberals almost never indict fellow liberals. That’s because they are all a bunch of hippy crooks! You don't think I have proof ? Where has the social security funds gone to?

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Mass Grave Exposes Entrenched Trafficking in Thailandi
X
May 05, 2015 5:50 PM
Police in southern Thailand have found two more camps believed to have held human trafficking victims -- one containing a buried skeleton. This comes just days after officials announced arrests in connection with the grisly discovery of 26 bodies in a mass grave at another location. Officials suspect as many as 400 mostly ethnic Rohingya from Myanmar were being held for ransom at the remote camp near the Malaysian border. Steve Sandford reports on developments in the case.
Video

Video Mass Grave Exposes Entrenched Trafficking in Thailand

Police in southern Thailand have found two more camps believed to have held human trafficking victims -- one containing a buried skeleton. This comes just days after officials announced arrests in connection with the grisly discovery of 26 bodies in a mass grave at another location. Officials suspect as many as 400 mostly ethnic Rohingya from Myanmar were being held for ransom at the remote camp near the Malaysian border. Steve Sandford reports on developments in the case.
Video

Video Russia's 'Victory Day' Glory Over Nazis Overshadowed by Ukraine

ussia is preparing to commemorate the 70th anniversary of the end of World War II, known since the Soviet era as “The Great Patriotic War,” with a massive parade on May 9th of military hardware and millions of medals handed out to veterans or their relatives. But critics say the Soviet-style display of power and nationalism overshadows tragic scars during and after the war that still influence politics and foreign policy, especially in the current Ukraine crisis.
Video

Video WWII Anniversary Brings Old Friends and New Worries

The 70th anniversary of the end of World War II has special significance, with Russia becoming more assertive in Ukraine and sending its military planes to the edges of western countries’ airspace. Changes in the geostrategic balance and the transatlantic relationship are felt across the continent, not least in German towns that have hosted U.S. military bases since the defeat of Nazi Germany. VOA’s Al Pessin visited Schweinfurt, Germany, where a large base closed last year.
Video

Video Abraham Lincoln Funeral Re-created for 150th Civil War Anniversary

Over the last four years, commemorative events to mark the 150th anniversary of the U.S. Civil War have brought thousands of visitors to battlefields and historic landmarks across the country. As VOA's Kane Farabaugh reports from the Midwest state of Illinois, the final event in the Civil War's sesquicentennial honors the final journey home of the slain American President, Abraham Lincoln.
Video

Video Campaign Raises Money to 'Uncuff' Journalists

Beginning Sunday – World Press Freedom Day – the Committee to Protect Journalists, a private U.S. group, is launching a campaign to bring attention to their plight and encourage efforts to free them. Deborah Block reports.
Video

Video Volunteers Pull Together to Aid Baltimore Riot Victims

Calm has returned to Baltimore, Maryland, after authorities lifted an overnight curfew imposed almost a week ago to stem the rioting that followed the funeral of Freddie Gray - the 25-year-old black man who died of spinal injuries suffered while in police custody. Six police officers, three of them African-American, have been charged in connection with his death. Baltimore is now trying to get back to normal, in part with the help of volunteers who responded to calls to help those in the city'
Video

Video From Aleppo To Berlin: Band of Brothers Escapes Civil War

Hundreds of thousands of Syrians have fled the civil war in their country and journeyed to Europe by boat across the Mediterranean. It is a terrifying ordeal with dangers at every turn. A group of Syrian brothers and their friends describe their ordeal as they try to reach Germany. VOA's Henry Ridgwell reports. ...
Video

Video Rural Nepal Suffers Brunt of Quake’s Devastation

Nepal is still coming to grips with the full extent of the devastation and misery caused by last Saturday’s magnitude 7.8 earthquake. Some of the hardest-hit communities have been cut off by landslides making it difficult to assess the precise toll. A VOA News crew has been among the first to reach a few of the smaller, remote communities. Correspondent Steve Herman reports from the Sindhupolchak district, east of Kathmandu, which suffered greatly in Nepal’s worst quake in more than 80 years.
Video

Video Obama Praises Work of 3 Immigrant Journalists

President Barack Obama met with three immigrant journalists at the White House Friday to praise them for their work ahead of World Press Freedom Day, May 3. In attendance: Dieu Cay (his pen name) a blogger from Vietnam recently released from prison; Lily Mengesha from Ethiopia who was harassed and detained for exposing the marrying off of young girls as child brides, and Fatima Tlisova, an ethnic Circassian from the North Caucasus region of Russia, who works for VOA's Russian Service.
Video

Video Middle East Atheist Channel Defies Taboo

In Egypt, a deeply religious country in a deeply religious region, atheism is not only taboo, it is dangerous. It is sometimes even criminal to publicly declare nonbelief. Despite the danger, one group of activists is pushing back with a new online channel that defends the right not to believe. VOA’s Heather Murdock reports.
Video

Video Nepal Quake Survivors Tell Their Stories

Against all hope, rescuers have found a few more survivors of the devastating earthquake that hit Nepal last Saturday. Mountain climbers and hikers trapped in remote places also have been airlifted to safety, and aid is finally reaching people in the areas closest to the quake's epicenter. Survivors and rescuers are now recounting their experience. Zlatica Hoke has this story.
Video

Video Lessons for Germany, Europe Remain on Anniversary of WWII's End

The 70th anniversary of the end of World War II will be marked May 8-9 in all European countries except Germany, which lost the war. How is the war viewed there, and what impact is it still having? From Berlin, VOA’s Al Pessin reports.
Video

Video Nepal Town Destroyed By Quake Counts Itself Lucky

Foreign search teams on Wednesday began reaching some of the communities outside Kathmandu that suffered worse damage than Nepal’s capital from last Saturday’s massive earthquake. VOA Correspondent Steve Herman is in Sankhu - a town of about 10,000 people - where there is relief the death toll is not higher despite widespread destruction.
Video

Video Somali Hotel Chain Owner Strives to Make a Difference

Many in the Somali diaspora are returning home to make a new life despite the continuing risks. Since 2011 when a military campaign against Al-Shabab militants began making progress, members of the diaspora community have come back to open hospitals, schools, hotels, restaurants and other businesses. Abdulaziz Billow in Mogadishu profiles the owner of a chain of hotels and restaurants who is helping to bring change to the once-deadly Somali capital.
Video

Video Child Migrants Cross Mediterranean Alone, Face Unknown Future

Among the thousands of migrants making the deadly journey by boat to Europe, there are unaccompanied girls and boys. Some have been sent by relatives to earn money; others are orphaned or fleeing war. From a shelter for young migrants in the Sicilian town of Caltagirone, VOA's Henry Ridgwell reports.

VOA Blogs