News / Science & Technology

Arid Areas Greening Because of Higher CO2 Levels

New research links gradual greening of arid areas like Australia’s outback to increasing concentrations of atmospheric carbon dioxide. (Photo by Bruce Doran)
New research links gradual greening of arid areas like Australia’s outback to increasing concentrations of atmospheric carbon dioxide. (Photo by Bruce Doran)

Related Articles

Carbon Storing Qualities of Coastal Wetlands Explored In Australia

Seminar in Sydney brings together governments, research institutions, non-governmental organizations from around the world to discuss ecosystems

Climate Change Threatens Loss of Common Plants, Animals

Study looks at plant, animal losses in a warmer world and predicts dramatic declines by the end of this century

Warmer Seas Fuel Maine Crab Invasion, Clammers Say

European green crabs, encouraged by rising ocean temperatures, eat their way through clam flats, threatening state's third-largest fishery
VOA News
Higher levels of carbon-dioxide has caused some of the Earth’s most arid regions to become more green, according to new research.

Scientists focused on the American southwest, Australia’s outback, the Middle East and parts of Africa, and found that from 1982 to 2010 there was a “fertilization effect” caused by increased carbon-dioxide levels.

Researchers predicted foliage would increase by 5 to 10 percent given the 14 percent increase in atmospheric CO2 concentration during the study period. The satellite data agreed, showing an 11 percent increase in foliage after adjusting the data for precipitation variations, according to a study published by the American Geophysical Union.

The use of satellite imagery was key to the findings.

“Satellites are very good at detecting changes in total leaf cover, and it is in warm, dry environments that the CO2 effect is expected to most influence leaf cover,” said  Randall Donohue of the Commonwealth Scientific and Industrial Research Organization (CSIRO) in Canberra, Australia, who led the effort.

Donohue added that leaf cover is a clue because “a leaf can extract more carbon from the air during photosynthesis, or lose less water to the air during photosynthesis, or both, due to elevated CO2.”

“If elevated CO2 causes the water use of individual leaves to drop, plants will respond by increasing their total numbers of leaves, and this should be measurable from satellite,” he said.

The scientists say they were able to isolate the effects of CO2 from other factors like precipitation, air temperature, the amount of light and land-use changes.

This was done by first averaging out the greenness levels of each location over 3-year periods to account for changes in soil wetness, for example. They then predicted the maximum amount of foliage that could be attained with the given precipitation along with other climatic variations to see the long-term greening effect of CO2.

The research also said that the fertilization effect could lead to different types of vegetation dominating the dry regions.

“Trees are re-invading grass lands, and this could quite possibly be related to the CO2 effect,” Donohue said. “Long lived woody plants are deep rooted and are likely to benefit more than grasses from an increase in CO2.”

While the researchers say the effects of fertilization as a result of higher CO2 levels need more study, it will likely lead to “significant environmental changes,” even if nothing else in the climate changes said Donohue.

You May Like

Official: S. Sudan President, Rebel Leader to Meet in Tanzania

Talks part of effort to end conflict in country that has left more than 10,000 people dead, displaced more than 1.5 million others More

Dutch Deny Link to Mystery Submarine off Sweden

Netherlands denies Russian claim that 'foreign vessel' photographed in waters off Sweden could be Dutch More

China Boosts Efforts to Help Afghan, Regional Stability

Observers say China’s increased regional involvement are due to concerns that Afghan instability and the presence of anti-China militants in Pakistani border areas could fuel Xinjiang troubles More

This forum has been closed.
Comment Sorting
Comments
     
by: Mike
June 27, 2013 6:52 AM
CSIRO is absolutely not "industry supported", it is a government funded independent body.


by: Babu G. Ranganathan
June 03, 2013 10:39 AM
THE WHOLE EARTH AT ONE TIME HAD A UNIFORM TEMPERATURE AND CLIMATE. The Bible in Genesis 1:6 teaches that there was water above the sky. This condition doesn’t exist today because that water fell upon the earth during the great Noahic flood. The water above the sky would have had a greenhouse effect so that the temperature around the globe would have been uniform and tropical, even at the North and South poles.

Please read my popular Internet article, ARE FOSSILS REALLY MILLIONS OF YEARS OLD? Evolutionary dating methods are not infallible and far from accurate. Check out some of my Internet articles and sites: NATURAL LIMITS OF EVOLUTION, WAR AMONG EVOLUTIONISTS (2nd Edition), NO HALF-EVOLVED DINOSAURS, DOES GOD PARTICLE EXPLAIN UNIVERSE'S ORIGIN? THE SCIENCE SUPPORTING CREATION and Internet article, TRADITIONAL DOCTRINE OF HELL EVOLVED FROM GREEK ROOTS
*I have given successful lectures (with question and answer period afterwards) defending creation before evolutionist science faculty and students at various colleges and universities. I've been privileged to be recognized in the 24th edition of Marquis "Who's Who in The East" for my writings on religion and science.


by: Phillip Noe from: Oregon
June 03, 2013 10:29 AM
Research who produced the study. CSIRO is an industry supported institution. Their mission is to research "... ways to benefit the Australian community and the economic and social performance of a number of industry sectors through research and development." So no, they do NOT research the costs of climate change. Those costs far outweigh any "greening" of arid areas. Consider the global decrease in fresh water supplies, raising sea levels, ocean acidification, etc. We need to change the ways we generate and use energy or we will suffer the consequences. It's too late to prevent ALL the effects but we can mitigate them. It's moral, the only rational thing to do.


by: Kitagawa Keikoh from: Daikanyama, TKO
May 31, 2013 7:56 PM
Does this research mean even if CO2 level increased there is no need to worry becuase it will lead aird area more greener by fertilization effect?
That sounds good. Let's produce more CO2 to solve food cricis.

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Exclusive: American Joins Kurds' Anti-IS Fighti
X
Zana Omer
October 18, 2014 6:37 PM
The United States and other Western nations have expressed alarm about their citizens joining Islamic State forces in Syria and Iraq. In a rare counterpoint to the phenomenon, an American has taken up arms with the militants' Syrian Kurdish opponents. Elizabeth Arrott has more in this exclusive profile by VOA Kurdish reporter Zana Omer in Ras al Ayn, Syria.
Video

Video Exclusive: American Joins Kurds' Anti-IS Fight

The United States and other Western nations have expressed alarm about their citizens joining Islamic State forces in Syria and Iraq. In a rare counterpoint to the phenomenon, an American has taken up arms with the militants' Syrian Kurdish opponents. Elizabeth Arrott has more in this exclusive profile by VOA Kurdish reporter Zana Omer in Ras al Ayn, Syria.
Video

Video South Korea Confronts Violence Within Military Ranks

Every able-bodied South Korean male between 18 and 35 must serve for 21 to 36 months in the country’s armed forces, depending upon the specific branch. For many, service is a rite of passage to manhood. But there are growing concerns that bullying and violence come along with the tradition. Reporter Jason Strother has more from Seoul.
Video

Video Comanche People Maintain Pride in Their Heritage

The Comanche (Indian nation) once were called the “Lords of the Plains,” with an empire that included half the land area of current day Texas, large parts of Oklahoma, New Mexico, Kansas and Colorado.The fierceness and battle prowess of these warriors on horseback delayed the settlement of most of West Texas for four decades. VOA’s Greg Flakus reports from Lawton, Oklahoma, that while their warrior days are over, the 15,000 members of the Comanche Nation remain a proud people.
Video

Video Turkey Campus Attacks Raise Islamic Radicalization Fears

Concerns are growing in Turkey of Islamic radicalization at some universities, after clashes between supporters of the jihadist group Islamic State (IS) or ISIS, and those opposed to the extremists. Pro-jihadist literature is on sale openly on the streets of Istanbul. Critics accuse the government of turning a blind eye to radicalism at home, while Kurds accuse the president of supporting IS - a charge strongly denied. Henry Ridgwell reports from London.
Video

Video Syrian Defector Leaks Shocking Photos of Torture Victims

Shocking photographs purporting to show Syrian torture victims are on display at the U.S. Holocaust Memorial Museum in Washington. The museum says the graphic images are among thousands of photographs recently smuggled out of Syria by a military policeman-turned-defector. As VOA reporter Julie Taboh reports, the museum says the photos provide further evidence of atrocities committed by the government of Syrian President Bashar al-Assad against its own people.
Video

Video Drought-Stricken California Considers Upgrading Water System

A three-year drought in California is causing a water shortage that is being felt on farms and cities throughout the state. As VOA's Mike O’Sullivan reports, water experts, consumers and farmers say California needs to make changes to cope with an uncertain future.
Video

Video TechShop Puts High-tech Dreams Within Reach

Square, a business app and card reader, makes it possible to do credit card transactions through cell phones. But what made Square possible? VOA’s Adrianna Zhang and Enming Liu have the answer.
Video

Video Church for Atheists Goes Global

Atheists, by definition, do not believe in God. So they should have no need of a church. But two years ago, a pair of British stand-up comedians decided to create one. Sanderson Jones and Pippa Evans told the BBC they envisioned “something like church but without God". Their “Sunday Assembly” movement has grown from a single congregation in London to dozens of churches around the world. Reporter Mike Osborne visited with the members of a Sunday Assembly that now meets regularly in Nashville.
Video

Video Robot Locates Unexploded Underwater Mines

Many educators believe that hands-on experience is the best way to learn. Proving that the method works is a project developed by a group of students at the Stevens Institute of Technology, in Hoboken, New Jersey. They rose up to a challenge posted by the U.S. Department of Defense and successfully designed and built an underwater robot for locating submerged unexploded ordnance. VOA’s George Putic reports.
Video

Video Liberia's JFK Hospital Reopens After Temporary Ebola Exposure

JFK Hospital is Liberia’s largest and one of its oldest medical facilities. The hospital had to close temporarily following the deaths of two leading doctors from Ebola. It is now getting back on its feet, with the maternity ward being the first section to reopen. Benno Muchler has more for VOA News from Monrovia.
Video

Video Hong Kong Protests Expose Generation Gap

Most of the tens of thousands of protesters in Hong Kong are students seeking democracy. Idealistic youths say while the older generation worries about the present, they are fighting for the territory's future. VOA's Daniel Schearf reports from Hong Kong.
Video

Video Liberians Living in US Struggle From Afar as Ebola Ravages Homeland

More than 8,000 Liberians live in New York City, more than in any other city outside of Liberia itself. As VOA’s Bernard Shusman reports, with the Ebola virus ravaging their homeland, there is no peace of mind for these New Yorkers.
Video

Video Kurds See War-Ravaged Kobani As Political, Emotional Heartland

Intense fighting is continuing between Islamic State militants -- also known as ISIS or ISIL -- and Kurdish forces around the Syrian town of Kobani, on the Turkish border. The U.S. said it carried out at least nine airstrikes against Islamic State positions Friday. Meanwhile the U.N. has warned that hundreds of civilians would be massacred if the town falls to the militants. Henry Ridgwell looks at the strategic significance of the city.

All About America

AppleAndroid