News / Science & Technology

Study: Warmer World Will Produce Fewer Clouds

The sun sets off Waikiki Beach, in Honolulu, Hawaii on Dec. 31, 2013. Scientists expect to see fewer clouds in a warmer world as carbon emissions rise.
The sun sets off Waikiki Beach, in Honolulu, Hawaii on Dec. 31, 2013. Scientists expect to see fewer clouds in a warmer world as carbon emissions rise.
Rosanne Skirble
With rising global carbon emissions, the planet will heat up and cloud cover will dissipate, according to a new study.

The concentration of heat-trapping carbon dioxide in the atmosphere has climbed 40 percent over the last century. And, the new study reports, in response to the release of CO2 emissions, from the burning of fossil fuels in power plants, cars and buildings, the Earth will continue to warm to dangerous levels. 

Steven Sherwood, a climate scientist at Australia's Centre of Excellence for Climate System Science and lead author of the report, says the prediction of a 4-degree celsius warming is based on the role of water vapor in cloud formation.

“What we see in the observations is that when air picks up water vapor from the ocean surface and rises up, it often only rises a few kilometers before it begins its descent back to the surface," Sherwood said. "Otherwise it might go up 10 or 15 kilometers. And those shorter trajectories turn out to be crucial to giving us a higher climate sensitivity because of what they do to pull water vapor away from the surface and cause clouds to dissipate as the climate warms up.” 

LISTEN Study: Warmer World Will Produce Fewer Clouds
Study: Warmer World Will Produce Fewer Cloudsi
|| 0:00:00
...
 
🔇
X

Under this scenario, in which clouds do not form, the Earth would absorb more sunlight. 

“The question for many years has been ,what is going to happen to the amount of low clouds?" Sherwood said. "Does it decrease when the Earth warms up or does it stay the same or maybe even increase?  And what we found is that it should be decreasing because of this mixing process, which pulls water vapor away from the layers where these clouds form and causes there to be fewer of them in the warmer atmosphere.” 

Climate models that show a slight global temperature response to carbon dioxide do not take the lower altitude water vapor process into account, according to Sherwood. Instead their simulations assume that all water vapor rises to 15 kilometers and forms clouds. 

“Estimates of the climate sensitivity that have been lower are founded on models of the atmosphere that are not consistent with observations,” he said.

When the processes in climate models are corrected to match the real world observations, the simulations produce cycles that take water vapor to a wider range of heights in the atmosphere. Sherwood says the study is yet another warning to curb emissions or deal with the impacts of climate change.

You May Like

Uganda Court Annuls Anti-Gay Law

Court says law was passed in parliament without enough members present for a full quorum More

Multimedia Thailand Makes Efforts to Improve Conditions for Migrant Laborers

In Thailand, its not uncommon for parents to bring their children to work; one company, in-collaboration with other organizations, address safety concerns More

In Indonesia, Jihad Video Raises Concern

Video calls on Indonesians to join Islamic State of Iraq and the Levant, ISIL More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
In Thailand, Some Efforts to Improve Conditions For Migrant Laborersi
X
Steve Herman
August 01, 2014 6:22 PM
Thailand has been facing increasing international scrutiny as a hub of human trafficking and slave labor. Some of the kingdom’s companies are striving to improve working conditions, especially for the millions of migrant laborers from surrounding countries. VOA Correspondent Steve Herman in Bangkok takes a look at one initiative for children at construction sites
Video

Video In Thailand, Some Efforts to Improve Conditions For Migrant Laborers

Thailand has been facing increasing international scrutiny as a hub of human trafficking and slave labor. Some of the kingdom’s companies are striving to improve working conditions, especially for the millions of migrant laborers from surrounding countries. VOA Correspondent Steve Herman in Bangkok takes a look at one initiative for children at construction sites
Video

Video Public Raises its Voice on Power Plant Pollution

In the United States, proposed rules to cut pollution from the nation’s 600 coal-fired power plants are generating a heated debate. The U.S. Environmental Protection Agency, charged with writing and implementing the plan, has already received 300,000 written comments. As VOA’s Rosanne Skirble reports, another 1,600 people are lining up this week at EPA headquarters and at satellite offices around the country to give their testimony in person.
Video

Video Information War Rages Alongside Real One in Ukraine

The downing of the Malaysian airliner two weeks ago, and allegations that Russians are shelling Ukrainian troops across the border, have moved the information war swirling around the Ukrainian conflict to a new level. VOA's Al Pessin reports from Kyiv.
Video

Video When Fighting Eases, Gazans Line Up at Bakeries

When there is a lull in the conflict in Gaza, residents who have been hunkered down in their apartments rush out to stock up on food and other necessities. Probably the most important destination is the local bakery. VOA’s Scott Bobb reports from Gaza City.
Video

Video China Investigates Powerful Former Security Chief

The public in China is welcoming the Communist Party's decision to investigate one of the country's once most powerful politicians, former domestic security chief Zhou Yongkang. Analysts say the move by President Xi Jinping is not only an effort to win more support for the party, but an essential step to furthering much needed economic reforms and removing those who would stand in the way of change. VOA's Bill Ide has more from Beijing.
Video

Video US-Funded Program Offers Honduran Children Alternative to Illegal Immigration

President Obama and Central American leaders recently agreed to come up with a plan to address poverty and crime in the region that is fueling the surge of young migrants trying to illegally enter the United States. VOA’s Brian Padden looks at one such program in Honduras - funded in part by the United States - which gives street kids not only food and safety but a chance for a better life without, crossing the border.
Video

Video 'Fab Lab' Igniting Revolution in Kenya

The University of Nairobi’s Science and Technology Park is banking on 3-D prototyping to spark a manufacturing revolution in the country. Lenny Ruvaga has more for from Nairobi's so-called “FabLab” for VOA.
Video

Video Immigrant Influx on Texas Border Heats Up Political Debate

Immigrants from Central America continue to cross the U.S.-Mexico border in south Texas, seeking asylum in the United States, as officials grapple with ways to deal with the problem and provide shelter for thousands of minors among the illegal border crossers. As VOA's Greg Flakus reports from Houston, the issue is complicated by internal U.S. politics and U.S. relations with the troubled nations that immigrants are fleeing.

AppleAndroid