HOME >> BIOLOGY >> NEWS
Autumn foliage may affect air quality, climate

BOULDER--Autumn leaves that light up hillsides in bold strokes of gold and other colors also appear to play a role in regional air quality and climate. This month scientists from the National Center for Atmospheric Research (NCAR) are measuring levels of chemicals that are emitted as leaves change color and fall to the ground at a research site in northern Michigan. The chemicals, known as volatile organic compounds (VOCs), have far-ranging effects: they combine with certain types of industrial emissions to create smog, and in some cases they play a role in global warming.

"VOCs are very important for both regional and global air quality issues," said NCAR's Alex Guenther. VOCs, which are the source of the appealing scents associated with pine needles and cut grass, pose no harm in a natural setting. But they can react with human-generated nitrogen oxides in the presence of sunlight to form ground-level ozone, the major component of smog. The emissions also have an impact on climate by slowing the rate at which greenhouse gases are oxidized in the atmosphere.

To measure foliage emissions, scientists from NCAR and other institutions are taking continuous readings above the forest canopy near Pellston, Michigan. Their instruments track both updrafts and downdrafts, monitoring ions that collide and transfer protons to the VOCs. "It's a very sophisticated observing system," Guenther explained.

The scientists picked Michigan in part because the area's abrupt, heavy frosts are likely to result in high emissions. In contrast, when leaves lose their summer green and wither more gradually, as in the southeast, the result is likely to be lower emissions that linger over a longer period of time. Preliminary findings show that concentrations of at least two VOCs, methanol and acetaldehyde, more than doubled after a week of colder weather (September 21-28), which signaled the beginning of autumn colors
'"/>

Contact: Anatta
anatta@ucar.edu
303-497-8604
National Center for Atmospheric Research/University Corporation for Atmospheric Research
24-Oct-2001


Page: 1 2

Related biology news :

1. Soil fungi affect parasitism of foliage-feeding insects
2. Tourists, soothsayers & scientists try to predict peak Fall foliage color
3. K-State, other universities to study how climate affects plant evolution
4. Study shows impact of emotionally healthy fathers when mothers poor mental health affects children
5. Anxiety during pregnancy affects child behavior
6. Hormone helps fish to mate, may affect human hearing
7. Moderate iron deficiency affects cognitive performance - but iron supplementation improves it
8. UCR study says second-hand smoke affects healing
9. How amphetamine affects the dopamine transporter
10. A link between thimerosal and the brain: Can vaccines affect central nervous system function?
11. Earliest evidence of humans affecting aquatic ecology in Canada, United States

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/14/2019)... N.J. (PRWEB) , ... September 12, 2019 , ... ... development, and manufacturing solutions for drugs, biologics, gene therapies, and consumer health products, ... of the company’s biologics business. Dr. Schaffer has played an integral advisory role ...
(Date:9/11/2019)... ... September 09, 2019 , ... Greenberg Traurig, LLP attorneys Stephen ... will speak at DeviceTalks Minnesota, Sept. 9-10, at the Hyatt Regency, Minneapolis. Greenberg Traurig ... Sciences & Medical Technology Group have been featured speakers at every DeviceTalks conference ...
(Date:9/8/2019)... ... September 06, 2019 , ... ... human mesenchymal stem/stromal cell (hMSC) biomanufacturing systems, today announces its release of ... and media system designed for product development. RoosterBio continues to simplify MSC ...
Breaking Biology News(10 mins):
(Date:8/6/2019)... ... August 06, 2019 , ... The San Diego Biotechnology ... the biweekly SDBN BUZZ podcast focused on connecting the region’s biotech community and ... to promote the region and attract external employers, investors, scientists, and others who ...
(Date:8/6/2019)... Ill. (PRWEB) , ... August 05, 2019 , ... ... that Jason Casarella has been recognized as a distinguished leader by PharmaVOICE magazine, ... featured in an article in the magazine’s July/August special issue. , As the ...
(Date:8/4/2019)... ... 2019 , ... Cirtec Medical Corporation, a strategic outsourcing partner for complex medical ... construction on a 30,000 sq. ft. manufacturing facility in the Coyol free zone, ... facility, which is expected to be fully operational by the end of the year, ...
(Date:7/26/2019)... ... July 25, 2019 , ... LeadingBiotech , an exclusive ... announces its Boston BD conference to be held on September 10, ... Boston , the event provides an opportunity for attendees to leverage insight from ...
Breaking Biology Technology:
Cached News: