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:9/22/2014)... robots could be much more useful in homes, if ... usually see the world with cameras and lasers, which ... that are hidden in clutter. A complementary way robots ... use of small ultra-high frequency radio-frequency identification (UHF RFID) ... allowing an RFID-equipped robot to search a room for ...
(Date:9/22/2014)... 2014 NXT-ID, Inc. (NASDAQ: NXTD ... mobile commerce market, issues the following corporate shareholder update ... Letter from the CEO : ... funding and joined the NASDAQ to support ramping of ... biometric and authentication products and services. This strategic achievement positions ...
(Date:9/21/2014)... September 22, 2014The story of cowpea (black-eyed peas) is ... world,s biggest problemseven more fascinating is the story of ... wrote Cowpea: The Food Legume of the 21st Century ... management, and use. The book was recently published by ... International Institute of Tropical Agriculture (IITA). , Singh has ...
Breaking Biology News(10 mins):New RFID technology helps robots find household objects 2New RFID technology helps robots find household objects 3NXT-ID Issues Shareholder Corporate Update 2NXT-ID Issues Shareholder Corporate Update 3NXT-ID Issues Shareholder Corporate Update 4
... Bellvitge Biomedical Research Institute (IDIBELL) have shown that breast ... higher level of the protein peroxiredoxin 2 (PRDX2). The ... this protein could be a new therapeutic strategy to ... in the online edition of the journal Oncogene ...
... Researchers have gained new insight into why 22% ... a folate concentration considered optimal for reducing the risk of ... of folate deficiency in the general Canadian population. When ... reason why some women are not achieving levels optimal for ...
... April 10, 2012 The neighborhoods in which children and ... whether or not they eat a healthy diet, get enough ... a special theme issue of the American Journal of ... uses the latest concepts and methods in geographic information systems ...
Cached Biology News:Geographic information systems demonstrate links between health and location 2
(Date:9/19/2014)... use light, rather than electricity, to move data ... efficiency is a growing concern as chips, transistor ... of optical circuits light emitters, modulators, and ... One promising light source for optical chips is ... when deposited as a single, atom-thick layer. Other ...
(Date:9/19/2014)... , September 19, 2014 ... technology, development of emerging drug systems and advanced Laboratory ... Dickinson and Company (NYSE: BDX ), Thermo ... Biosciences Inc. (NASDAQ: RGDO ), Sangamo Biosciences ... (NASDAQ: HOLX) Pressure BioSciences, Inc. (OTCQB: PBIO) ...
(Date:9/19/2014)... 2014 BioTech News Coverage: Progress ... results of studies and trials.  Companies in focus are: ... LLY ), Gilead Sciences Inc. (NASDAQ: ... ) and Arena Pharmaceuticals Inc. (NASDAQ: ARNA) ... therapeutics for the treatment of cancer, announced that the ...
(Date:9/19/2014)... 2014 Dublin ... has announced the addition of the  "Micro Market ... their offering.       (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ... the fastest-growing segments in the chromatography market. The ... and expected to reach $2.0 billion by 2019, ...
Breaking Biology Technology:Toward optical chips 2Toward optical chips 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 2Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 4Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 5Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 6Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 7Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 2Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 3Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 4Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 5Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 6Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 7Micro Market Monitor : Global Pre-packed Chromatography Columns 2
... Council has teamed with JobSightUSA , a top-ranked ... match job seekers with positions based on specific "skill ... that are considering locating or expanding in Wisconsin to ... Wisconsinite workers who may wish to return to the ...
... plugs, cut the cords, and can the cables as we ... for all the freedom and mobility, we are nowhere without ... the like. That fact alone has turned the average business ... most obscure corner of airports and coffee houses. Indeed, Im ...
... 2004, the New Venture Center at the Fitchburg ... in its first phase. , ,Ground-breaking will be held on ... tenant is another nanotech company, Imago Scientific . When it ... to staff up to 71 over the next eight months. , ...
Cached Biology Technology:Power for the people 2Fitchburg Technology Campus attracts nanotechnology firms 2
... is the complete enterprise microarray informatics platform for ... Buy Acuity once and use it forever without ... for Quality Acuity has all the analysis ... your data, from quality control statistics and normalization, ...
... workstation offers precise 96 and 384-well transfers ... 100ul and 200ul disposable tips, the 96 ... and precision across a volume range from ... two positions that enable indexing into 384 ...
... ideal instrument for budget-conscious labs that want to ... Get Applied Biosystems proven PCR performance at ... without sacrificing results. Enhance productivity with ... Can Afford The Applied Biosystems 2720 ...
... to Salmonella typhimurium The genus Salmonella is ... is composed of Gram-negative bacilli that are facultative ... the "H" or flagellar antigen (phase 1 & ... the LPS moiety) and the "Vi" or capsular ...
Biology Products: