Skip to main content

Asian air pollution could have impact on global weather patterns

By Zoe Li, CNN
April 15, 2014 -- Updated 1007 GMT (1807 HKT)
Air pollution reaches new heights on Beijing's second ring road in February 2014.
Air pollution reaches new heights on Beijing's second ring road in February 2014.
STORY HIGHLIGHTS
  • Particles in the air known as aerosols are responsible for cloud formation
  • More aerosols blowing in from Asia to the Pacific Ocean means intensifying storm patterns, says new study
  • Speculation on intense Pacific storm track driving freak winter weather in U.S., Canada

(CNN) -- A study finds that air pollution from Asia directly affects the storm pattern over the Pacific Ocean. Researchers further speculate that this could be driving freak winter weather in North America.

"The Pacific storm track is a major driving force over global weather patterns," says the study's lead author Yuan Wang, a post-doctorate fellow at the NASA U.S. Jet Propulsion Laboratory.

"The modulated storm track can be linked to abnormal weather behavior in the mid-latitudes of the Northern hemisphere, including U.S. and Canada."

Results from the decade-long research project were recently published in the Proceedings of the National Academy of Sciences (PNAS).

China tackles 'airpocalypse'
Chinese school builds clean air dome
Choking on pollution as China grows

Smog central

Reports of high levels of air pollution regularly emerge from the Asia region.

In January, the U.S. Embassy in Beijing recorded hazardous levels of particulate matter in the Chinese capital's air, at 18 times the recommended amount by the World Health Organization. Residents were warned to stay indoors.

Around the same time, a report by Yale and Columbia sparked debate on whether Indian capital New Delhi had worse pollution than Beijing.

Now, Wang and his fellow researchers say pollution in these Asian cities is becoming a global problem.

Fossil fuel burning and petrochemical processing in Asia's rapidly developing economies lead to a build-up of aerosols, fine particles suspended in the air. Typically, aerosol formation is thought of as the antithesis to global warming: it cools our Earth's climate.

But researchers say, too much of any one thing is never good.

"Aerosols provide seeds for cloud formation. If you provide too many seeds, then you fundamentally change cloud patterns and storm patterns," says co-author of the study, Renyi Zhang, a professor of atmospheric sciences at Texas A&M University in College Station.

From east to west

The study, which looked at simulated climate models using data from the Intergovernmental Panel on Climate Change (IPCC), shows that aerosols from Asia are transported to the Pacific region and intensifying the storm track there.

Although the results only show the impact specifically on the Pacific Ocean region, researchers theorize that the full effect reaches around the globe.

"We are observing the mid-latitude cyclone system, which transports heat and moisture from low to high latitudes. If this system is changed by air pollution from Asia, then global heat distribution will also be changed. We can expect that weather patterns over other parts of the world can be affected," says lead author Wang.

Co-author Zhang further agrees that it is "very possible" that abnormal weather such as extremely cold winters in the U.S. are driven by Asian pollution.

The experts will conduct more research to assess the full global impact of Asian pollution, including creating more climate models, monitoring storm patterns by satellite, and conducting measurements in the atmosphere.

READ: China looks for blue-sky solutions as smog worsens

READ: WHO: Air pollution caused one in eight deaths

ADVERTISEMENT
Part of complete coverage on
November 21, 2014 -- Updated 2319 GMT (0719 HKT)
China and likely other countries have the capacity to shut down the U.S. power grid, says the NSA.
November 21, 2014 -- Updated 0121 GMT (0921 HKT)
If it wasn't for a comic's skit, Bill Cosby would still be America's favorite father, says expert.
November 21, 2014 -- Updated 1550 GMT (2350 HKT)
Obama orders the most sweeping overhaul of U.S. immigration in decades, prioritizing the deportation of "felons, not families."
November 18, 2014 -- Updated 2106 GMT (0506 HKT)
Fighters loyal to ISIS are now in control of Derna, a city on Libya's Mediterranean coast.
November 19, 2014 -- Updated 1945 GMT (0345 HKT)
The founder of a U.S. nonprofit that works with returning soldiers is named CNN's Hero of the Year.
November 17, 2014 -- Updated 1324 GMT (2124 HKT)
It's a very big challenge but NASA chief scientist Ellen Stofan thinks it can be done.
November 17, 2014 -- Updated 0039 GMT (0839 HKT)
CNN's Atika Shubert explains how the most recent ISIS video differs from the other previous hostage execution videos.
November 17, 2014 -- Updated 1738 GMT (0138 HKT)
A Syrian cleric condemns ISIS and its execution of U.S. hostage Peter Kassig.
November 16, 2014 -- Updated 1720 GMT (0120 HKT)
Volunteer fighters in eastern Ukraine dig down just 800 meters from the front line.
November 18, 2014 -- Updated 1729 GMT (0129 HKT)
TV anchor wears the same suit for a year. Female colleague wears new outfit daily. Who gets criticized?
November 21, 2014 -- Updated 1204 GMT (2004 HKT)
Each day, CNN brings you an image capturing a moment to remember, defining the present in our changing world.
Browse through images from CNN teams around the world that you don't always see on news reports.
ADVERTISEMENT