Navigation Links
Ground-level ozone falling faster than model predicted
Date:3/11/2013

There is good news and better news about ground-level ozone in American cities. While dangerous ozone levels have fallen in places that clamp down on emissions from vehicles and industry, a new study from Rice University suggests that a model widely used to predict the impact of remediation efforts has been too conservative.

Particularly in Northeastern cities, ozone levels dropped even beyond what was anticipated by cutting emissions of nitrogen oxides (NOx) from 2002 to 2006. The study published online by the journal Atmospheric Environment suggests the Community Multiscale Air Quality (CMAQ) model misjudged the reduction in ozone by 20 to 60 percent.

"The models have been underpredicting how much benefit we get from controlling NOx emissions in some instances," said Daniel Cohan, an assistant professor of civil and environmental engineering and an author of the study with Rice graduate student Wei Zhou and Sergey Napelenok, a scientist in the Environmental Protection Agency's Atmospheric Modeling and Analysis Division.

"Following major controls of NOx, ozone has come down more quickly than anticipated," Cohan said. "This is good news. But it also poses a challenge because states rely upon models to predict whether they'll attain ozone standards in the future. If the models have key uncertainties that affect their responsiveness, that can affect the states' control strategies."

Ozone is not emitted directly but instead forms near the ground from precursor emissions of NOx and hydrocarbons. Modeling of this complex chemistry is important to help states comply with federal standards for ozone, which now stand at 75 parts per billion (ppb) and may be tightened by the Obama administration. A recent Rice study showed a positive correlation between high ozone levels and cardiac arrest.

In 2002, the EPA implemented a cap-and-trade program known as the NOx SIP Call to curtail emissions of ozone-forming NOx from indu
'/>"/>

Contact: David Ruth
david@rice.edu
713-348-6327
Rice University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Ozone treated water v. lethal microbial material
2. Houston Clean Air Network offering real-time online ozone report
3. Ozones impact on soybean yield: Reducing future losses
4. University of Illinois receives grant to study ozone resistance in corn
5. Ozone levels have sizeable impact on worker productivity
6. 2 climate scientists win 2012 Vetlesen Prize for work on ozone hole, ice cores
7. Oceans acidifying faster today than in past 300 million years
8. From scourge to saint: E. coli bacteria becomes a factory - to make cheaper, faster pharmaceuticals
9. Tiny electrical sensors could signal faster MRSA diagnosis
10. Athletic frogs have faster-changing genomes
11. What does a tree growing faster than its neighbor look like from outer space?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/22/2014)... the Monell Center reveals that simply believing that an ... asthmatics for at least 24 hours following exposure. The ... health-related outcomes. , "Asthmatics often are anxious about scents ... harmful, our bodies react as if that odor is ... a Monell physiologist. "Both patients and care providers need ...
(Date:7/22/2014)... A new study that examined the survival rates ... bycatch in commercial longline fishing operations found large ... bigeye thresher, dusky, and scalloped hammerhead being the ... University of Miami (UM) Rosenstiel School of,Marine and ... Science and Policy, provides,new information to consider for ...
(Date:7/22/2014)... Highly purified crystals that split light with uncanny ... optics and, potentially, computers that manipulate light instead ... techniques, such as etching them with a precise ... expensive. , Now, researchers at Princeton and Columbia ... allow scientists to customize and grow these specialized ...
Breaking Biology News(10 mins):In asthma, it's not just what you smell, but what you think you smell 2In asthma, it's not just what you smell, but what you think you smell 3New study reveals vulnerability of sharks as collateral damage in commercial fishing 2Technique simplifies the creation of high-tech crystals 2Technique simplifies the creation of high-tech crystals 3
... 2012 -- Researchers in the Department of Health ... Public Health assessed the impact of pollution on ... levels. Their results show that ozone, even at ... of the world, has significant negative impacts on ...
... of California, San Diego have built a small fleet ... air quality in real time on their smart phones. ... from chronic conditions, such as asthma, who need to ... air-quality monitoring system capable of delivering real-time data to ...
... Calif. (December 18, 2012) The Hass Avocado ... of the unique, positive benefits of consuming fresh ... are currently underway to investigate the relationship between ... avocados, potential positive role in weight management and ...
Cached Biology News:Ozone levels have sizeable impact on worker productivity 2Small, portable sensors allow users to monitor exposure to pollution on their smart phones 2Small, portable sensors allow users to monitor exposure to pollution on their smart phones 3Small, portable sensors allow users to monitor exposure to pollution on their smart phones 4Hass Avocado Board study published in Food & Function journal 2
(Date:7/22/2014)... 22, 2014 Nuclear reactors are used ... by controlled fission chain reaction in nuclear reactors is ... used to drive a power- generating turbine. Currently nuclear ... world’s total electricity production. Nuclear reactor market is expected ... planned and proposed nuclear reactor projects. , Early buyers ...
(Date:7/22/2014)... 2014 Two new members were elected ... at its annual Shareholders Meeting on June 13: Kerry ... The PFM Group, and Stephen T. Zarrilli, President and ... the election of Michael A. DiPiano, Managing General Partner ... Richard P. Jaffe, Esq., of Duane Morris LLP, as ...
(Date:7/22/2014)... Massachusetts en SHENZHEN, China ... Co., LTD, (BGI Tech), een dochtermaatschappij van BGI, ,s ... de wereldwijde introductie aan van een nieuwe service ten ... sector meest geavanceerde platform van Complete Genomics. ... dat binnen de sector in hoog aanzien staat vanwege ...
(Date:7/22/2014)... 2014  The Broad Institute today announced an ... Ted Stanley aimed at galvanizing scientific research ... on molecular understanding to hundreds of millions of ... Stanley commitment – the largest ever in psychiatric ... in general – will support research by a ...
Breaking Biology Technology:Nuclear Energy Market: Global Industry Analysis, Size, Share, Analysis, Growth and Forecast 2013 - 2019 2Nuclear Energy Market: Global Industry Analysis, Size, Share, Analysis, Growth and Forecast 2013 - 2019 3Two New Members Elected to University City Science Center Board of Directors 2Two New Members Elected to University City Science Center Board of Directors 3BGI Tech introduceert service op gebied van hele menselijke exoomsequencing op geavanceerd Complete Genomics-platform 2$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 2$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 3$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 4$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 5$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 6$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 7$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 8$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 9$650 million commitment to Stanley Center at Broad Institute aims to galvanize mental illness research 10
... routinely runs such tests on samples sent in from all ... towards a truly personalised medicine. And researchers are exploring new ... a molecular scale: the genes that are being read or ... bloodstream; and the length of the telomeres capping its chromosomes. ...
... yoghurt have a note telling you that the product contains ... spatial arrangement of their atoms. The two"isomers", L(+) and D(-), ... to the right or left respectively. Of course the capacity ... not confined to solutions of yoghurt. Light interacts in one ...
... In what became known as the ,Scotch tape technique," researchers ... Graphene is a single layer of carbon atoms arranged in ... Graphene is a wonder material. It is one-hundred-times better ... And, at just one atom thick, it is so thin ...
Cached Biology Technology:CNIO researchers take part in the most comprehensive personalized medicine study performed to date 2CNIO researchers take part in the most comprehensive personalized medicine study performed to date 3Designer lights from the physics lab 2Straintronics: Engineers create piezoelectric graphene 2Straintronics: Engineers create piezoelectric graphene 3Straintronics: Engineers create piezoelectric graphene 4
Caliper offers a wide array of standard LabChip products designed to be used in combination with our AMS 90 and LabChip 3000 microfluidic platforms....
... Pro260 reagents and supplies, for 10 ... sufficient to perform protein analysis with ... electrophoresis system. Supplied are 3 x ... Pro260 stain, 60 microliters Pro260 ladder ...
...
... achieve high experimental throughput, minimum input ... 4 up to 16 culture ... provides users with proven fermentation results ... yeast, fungi or any other microbial ...
Biology Products: