HOME >> BIOLOGY >> NEWS
Atmospheric chemistry key to global and local air pollution

Albuquerque, N.M. -- The chemical cycles in the troposphere along with pollutants of human and natural origin can alter the composition of the air and effect local, regional and global environmental quality, according to a Penn State researcher.

The troposphere -- the area of the Earth's atmosphere from the surface to ten miles above the surface where weather exists -- is also where pollution becomes a problem. In the atmosphere, a complex series of chemical reactions can alter some pollutants so that they rain out as aerosol particles or acid rain and clear the air. Other compounds remain in the air, changing, and changing again as other chemicals cause reactions.

"Pollution from megacities and biomass burning, including precursor gases to hydrogen oxides such as acetone and formaldehyde, lofted into the upper troposphere, can become the dominant hydrogen oxide source and result in efficient ozone production," says Dr. William Brune, professor of meteorology and head of Penn State's meteorology department. "These compounds can also be transported great distances before descent, possibly influencing the chemistry of remote regions."

Ozone is complicated. In the stratosphere it serves to protect life from the detrimental effects of the sun's ultraviolet radiation. At ground level, it is a pollutant implicated in respiratory problems and eye irritation. Sunlight breaks ozone apart resulting in the creation of the very reactive hydroxyl radical which begins the process that removes some pollutants from the air. However, when hydroxyl radicals break down some compounds, they produce other hydrogen oxides, which react with other pollutants and form ozone.

"The hydroxyl radical drives atmospheric oxidation by reacting with chemicals emitted from Earths surface, thus creating new chemicals that are more easily scavenged and removed by aerosols, clouds and rain," Brune told attendees today (Jan. 15) at the annual meeting of the American Meteorological Socie
'"/>

Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
14-Jan-2001


Page: 1 2 3

Related biology news :

1. Atmospheric aerosols impact on smog formation being reassessed
2. Atmospheric carbon monoxide levels decreasing in mid-Atlantic region
3. 14,000 Years Of Atmospheric Lead Emissions Recorded In Swiss Peat Bog As Published In Science Magazine
4. Atmospheric Chemistry -- A Mysterious Isotope Effect In A Well-Known AtmosphericPollutant Discovered
5. U of T research answers key question in biochemistry
6. Carnegie Mellon University hosts ACS-PRF summer school on green chemistry
7. High profile publications in biology and biochemistry on rise at UH
8. Alcoholism risk linked to gene involved in brain chemistry
9. Biochemistry and Molecular Biology: Research at the Interface of Biochemistry and Human Health
10. Houston scientist named as rising star in chemistry
11. The American Society for Biochemistry and Molecular Biology meets in Boston

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


(Date:3/21/2016)... Massachusetts , March 22, 2016 ... facial recognition with passcodes for superior security   ... ), a leading provider of secure digital communications services, ... their biometric technology and offer enterprise customers, particularly those ... secure facial recognition and voice authentication within a mobile ...
(Date:3/15/2016)... JERUSALEM , March 15, 2016 ... Jerusalem , the technology-transfer company of the Hebrew University, ... developer of remote sensing technology of various human biological ... funding, raising $2.0 million from private investors. ... technology, based on the detection of electromagnetic emissions from ...
(Date:3/11/2016)... , March 11, 2016 ... market research report "Image Recognition Market by Technology (Pattern ... and Advertising), by Deployment Type (On-Premises and Cloud), by ... 2022", published by MarketsandMarkets, the global market is expected ... USD 29.98 Billion by 2020, at a CAGR of ...
Breaking Biology News(10 mins):
(Date:5/4/2016)... ... , ... Proove Biosciences, Inc. , the commercial and research leader in ... . The partnership is designed to advance research in pain genetics in an effort ... With the new agreement, researchers at Proove Biosciences are able to collaborate with Luda ...
(Date:5/4/2016)... ... May 04, 2016 , ... The Children’s Tumor Foundation announced its annual month-long ... grow on nerves throughout the body. It affects 1 in 3,000 people of all ... during the month of May, as well as online activities, Neurofibromatosis Awareness Month and ...
(Date:5/4/2016)... ... May 04, 2016 , ... PBI-Gordon Corporation is pleased to announce Doug ... Doug began his career at PBI-Gordon in February 1988, after finishing his masters in ... roles, ranging from customer service to national product manager, to helping develop, name and ...
(Date:5/3/2016)... 2016 The report "Biochips ... Gene Expression) Lab-on-a-chip (IVD & POC, Proteomics), ... Centers), Fabrication Technology (Microarrays, Microfluidics) - Forecast ... is expected to reach USD 17.75 Billion ... 2015, growing at a CAGR of 18.4% ...
Breaking Biology Technology:
Cached News: