Navigation Links
Weather deserves medal for clean air during 2008 Olympics
Date:12/28/2011

RICHLAND, Wash. -- New research suggests that China's impressive feat of cutting Beijing's pollution up to 50 percent for the 2008 Summer Olympics had some help from Mother Nature. Rain just at the beginning and wind during the Olympics likely contributed about half of the effort needed to clean up the skies, scientists found. The results also suggest emission controls need to be more widely implemented than in 2008 if pollution levels are to be reduced permanently.

Reporting their findings December 12 in the journal Atmospheric Chemistry and Physics, co-author atmospheric chemist Xiaohong Liu at the Department of Energy's Pacific Northwest National laboratory said, "In addition to the emission controls, the weather was very important in reducing pollution. You can see the rain washing pollution out of the sky and wind transporting it away from the area."

Liu and colleague Chun Zhao at PNNL and at the Chinese Academy of Sciences in Beijing took advantage of the emission controls China put into play before and during the August Olympics to study the relative contributions of both planning and nature. Chinese officials restricted driving, temporarily halted pollution-producing manufacturing and power plants, and even relocated heavy polluting industries in preparation for the games.

To find out if the controls worked as well as people hoped, the researchers modeled the pollution and weather conditions in the area before, during and after the Olympics. They compared the model's results with measured amounts of pollution, which matched well.

Adding up the sources of pollution and the sinks that cleared it out, the team found that emission sources dropped up to a half in the week just before and during the Olympics. And while some pollution got washed out by rain or fell out of the sky, most of it got blown away by wind.

"They got very lucky. There were strong storms right before the Olympics," said Liu.

In addition to rain, wind also helped. Beijing is bordered on the south by urban areas and on the north by mountains, so wind blowing north would carry more pollution into the city. Examining the direction of the wind, the researchers saw that it generally blew south in the time period covering the Olympic period.

"The area we looked at is about 50 miles south. This suggests that emission controls need to be on a regional scale rather than just a local scale," said Liu.

The importance of regional controls meshes well with previous research on 2008 Olympics air quality that focused on nitrogen-based pollutants.

Next, the researchers will be examining the effect of pollution on other weather events and climate change in China. Pollutants are very small particles, and some suspect they might be causing fog to form rather than rain due to numerous pollution particles in China, Liu said.


'/>"/>

Contact: Mary Beckman
mary.beckman@pnnl.gov
509-375-3688
DOE/Pacific Northwest National Laboratory
Source:Eurekalert

Related biology news :

1. Scientists forecast crops that adapt to changing weather
2. Researcher finds key to ancient weather patterns in Floridas caves
3. Australias endangered bettong reveals how weather effects species distribution
4. Scientists probe Indian Ocean for clues to worldwide weather patterns
5. Something odd is happening with Namibias weather
6. Deepwater Horizon crude less toxic to bird eggs after weathering at sea
7. Weatherstone Fellows publish research as Autism Speaks announces 2011 Weatherstone Fellows
8. Northern Eurasian snowpack could be a predictor of winter weather in US, team from UGA reports
9. Columbia Engineering team makes major step in improving forecasts of weather extremes
10. Seaports need a plan for weathering climate change, Stanford researchers say
11. Circadian rhythms spark plants ability to survive freezing weather
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/4/2017)... Solutions, a global clinical research organization (CRO), announces the launch of ... 4, 2017. Shadow is designed to assist medical writers and biometrics ... the European Medicines Agency (EMA) in meeting the requirements for de-identifying ... ... ...
(Date:6/23/2017)... and ITHACA, N.Y. , ... and Cornell University, a leader in dairy research, today ... bioinformatics designed to help reduce the chances that the ... the onset of this dairy project, Cornell University has ... for Sequencing the Food Supply Chain, a food safety ...
(Date:5/6/2017)... , May 5, 2017 ... just announced a new breakthrough in biometric authentication ... exploits quantum mechanical properties to perform biometric authentication. These ... smart semiconductor material created by Ram Group and ... finance, entertainment, transportation, supply chains and security. Ram ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... AMRI, a ... biotechnology industries to improve patient outcomes and quality of life, will now be ... are being attributed to new regulatory requirements for all new drug products, including ...
(Date:10/11/2017)... ... 2017 , ... At its national board meeting in North ... the co-founder, CEO and chief research scientist of Minnesota-based Advanced Space Technology and ... ARCS Alumni Hall of Fame . ASTER Labs is a technology development ...
(Date:10/11/2017)... ... ... a basic first aid supply for any work environment, but most personal eye wash can ... a dangerous substance enters both eyes? It’s one less decision, and likely quicker response time ... , “Whether its dirt and debris, or an acid or alkali, getting anything in your ...
(Date:10/11/2017)... Md. (PRWEB) , ... October 11, 2017 , ... ... digital pathology, announced today it will be hosting a Webinar titled, “Pathology is ... Advanced Pathology Associates , on digital pathology adoption best practices and how Proscia ...
Breaking Biology Technology: