Featured Research

from universities, journals, and other organizations

Pollution Knows No Borders

Date:
December 14, 2006
Source:
Penn State
Summary:
Plumes of ozone-producing pollution routinely cross political boundaries, influence local regulatory efforts and impact health and the environment, according to a team of atmospheric chemists trying to trace ozone in the lower atmosphere.

UNAM students launching in Mexico City as part of August2006 IONS. Location is UNAM Atmospheric Chemistry Building.
Credit: Anne Thompson

Plumes of ozone-producing pollution routinely cross political boundaries, influence local regulatory efforts and impact health and the environment, according to a team of atmospheric chemists trying to trace ozone in the lower atmosphere.

Related Articles


"There is a connection between pollution in Mexico City and in Houston, Texas," says Dr. Anne M. Thompson, professor of meteorology, Penn State. "The spring, which is the end of the dry season, is the beginning of field burning. That is when the winds move toward the U.S. so that Houston gets an added boost of ozone into their cycle."

Thompson and a large team of researchers carries out a program launching ozonesondes in experiments that measure ozone and other variables in the atmosphere. The ozonesonde instrument packages are carried into the air by weather balloons. Recently, Thompson's team tested the air in the Mexico City area and Houston, Texas, and in Richland, Wash. Pollution in Mexico City affects U.S. Gulf Coast areas including Houston. Richland is affected by pollution coming across the Pacific Ocean from Asia.

The airborne instruments measure temperature, relative humidity, elevation, location -- if a geographic positioning system instrument is aboard -- and ozone. The balloons reach an altitude of between 22 and 25 miles before they explode due to decreased pressure and the instrument package falls to Earth and shatters. Ozone is manufactured in the atmosphere by sunlight working on a combination of hydrocarbons, carbon monoxide and nitrogen oxides, all chemicals created by burning organic fuels. Ozone can be either a good chemical or a pollutant, depending on where it occurs in the atmosphere. In the upper atmosphere, ozone provides a shield against the suns ultra violet radiation, but in the lower atmosphere, it is a pollutant that causes health problems and can damage crops. "In August, over Mexico City, we recorded a level of 150 parts per billion of ozone," Thompson told attendees at the fall meeting of the American Geophysical Union in San Francisco, today (Dec. 11). "In the U.S., the standard is 80 parts per billion averaged over eight hours."

With the Mexican/Houston experiment, the researchers did find a link between ozone levels in the Mexico City area and levels a few days later in Houston on a number of occasions. The effect was strongest in March when Mexico City air was stagnant and the normal air flow is northeast toward Houston. The researchers have not completed analysis of the Richland experiment.

Tracking ozone transport and pollution are not as simple as finding a pollution source and tracking it. Natural factors play into the equation. "Summer rains are supposed to wash pollution out of the air," says Thompson. "But, because of lightning and pollution pumped up by thunderstorms, measurements over Mexico were still high in August."

Lightning occurs more frequently in the tropics than in other areas of the globe. The high amounts of energy released by a lightning strike or a cloud-to-cloud lightning flash produces nitric oxide, a chemical that leads to ozone formation. The amount of ozone produced can be significant and is related to the level of lightning activity.

Information from only a few locations will not supply sufficient data to understand global ozone production.

"Each time we send a balloon up, we lose the package," says the Penn State scientist. "Each package is $1,000."

To gather as much information as possible, the IONS-06 (INTEX Ozonesonde Network Study) project -- part of the broader Intercontinental Transport Experiment (INTEX) that includes aircraft and measures other atmospheric chemicals -- followed on the IONS-04 project. IONS-06 incorporates data from across North America with a variety of researchers and research sites from Rhode Island to California and from Mexico to Ontario, Canada.

The project also includes a variety of government agencies -- NASA, Jet Propulsion Laboratory, National Oceanic and Atmospheric Administration, Los Alamos National Laboratory and Environment Canada/Meteorologic Service of Canada -- as well as the universities.

Beside Thompson, other Penn State researchers were S.K. Miller, research associate; J.E. Yorks and R. B. Long, graduate students; and M.J. Madigan, undergraduate student. Researchers from other institutions included J.C. Witte and T.L Kucsera, NASA Goddard Space Flight Center; B. Leer, University of Houston; and G. Morris, Valparaiso University.

NASA funded Thompson's portion of the IONS-06 project.


Story Source:

The above story is based on materials provided by Penn State. Note: Materials may be edited for content and length.


Cite This Page:

Penn State. "Pollution Knows No Borders." ScienceDaily. ScienceDaily, 14 December 2006. <www.sciencedaily.com/releases/2006/12/061212091901.htm>.
Penn State. (2006, December 14). Pollution Knows No Borders. ScienceDaily. Retrieved November 21, 2014 from www.sciencedaily.com/releases/2006/12/061212091901.htm
Penn State. "Pollution Knows No Borders." ScienceDaily. www.sciencedaily.com/releases/2006/12/061212091901.htm (accessed November 21, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Friday, November 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

AFP (Nov. 21, 2014) Toyota presented its hydrogen fuel-cell compact car called "Mirai" to US consumers at the Los Angeles auto show. The car should go on sale in 2015 for around $60.000. It combines stored hydrogen with oxygen to generate its own power. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Google Announces Improvements To Balloon-Borne Wi-Fi Project

Google Announces Improvements To Balloon-Borne Wi-Fi Project

Newsy (Nov. 21, 2014) In a blog post, Google said its balloons have traveled 3 million kilometers since the start of Project Loon. Video provided by Newsy
Powered by NewsLook.com
5 Hot Months, 1 Warm Year And All The Arguments To Follow

5 Hot Months, 1 Warm Year And All The Arguments To Follow

Newsy (Nov. 21, 2014) The NOAA released statistics Thursday showing October was the fifth month this year with record temps and 2014 will likely be the hottest on record. Video provided by Newsy
Powered by NewsLook.com
Nations Pledge $9.3 Bn for Green Climate Fund

Nations Pledge $9.3 Bn for Green Climate Fund

AFP (Nov. 20, 2014) Nations meeting in Berlin pledge $9.3 billion (7.4 bn euros) for a climate fund to help poor countries cut emissions and prepare for global warming, just shy of a $10bn target. Duration: 00:46 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins