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:12/10/2014)... , Dec. 9, 2014 CIE San Diego ... that provides the connective tissue that enhances care coordination ... to easily share client-level information; earned a second $1 ... to organizations serving seniors aging in community and; will ... on December 11 th 4-6p. CIE ...
(Date:12/4/2014)... GARDENS, Fla. , Dec. 3, 2014 /PRNewswire/ ... solutions, today announced that its DigitalPersona ® ... fingerprint readers have been deployed throughout First Bank ... , South Carolina and ... in Southern Pines, North Carolina ...
(Date:11/21/2014)... MOUNTAIN VIEW, Calif. , Nov. 20, 2014 /PRNewswire/ ... for higher driver efficiency are piloting the North American ... the number of accidents growing, gesture recognition systems that ... will make a mark in the industry. ... of the Automotive Gesture Recognition Market in ...
Breaking Biology News(10 mins):Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4
... DURHAM, N.C. Chandra Tucker shines a blue light on ... edges of them start to glow. The effect is the result ... into the cell. Researchers could use this novel "on-off switch" ... doses of medication directly to diseased cells, said Tucker, an assistant ...
... Researchers at the Institute for Regenerative Medicine at Wake Forest ... milestone in the quest to grow replacement livers in the ... to successfully engineer miniature livers that function at least ... step is to see if the livers will continue to ...
... chemical that gives curry its zing, holds promise in ... of a condition known as fatty liver disease, new ... in turmeric, a plant used by the Chinese to ... study highlights its potential in countering an increasingly common ...
Cached Biology News:Researchers could use plant's light switch to control cells 2Researchers engineer miniature human livers in the lab 2Spice in curry could prevent liver damage 2
(Date:12/19/2014)... December 18, 2014 iLab Solutions, the ... appointment of Siri Bryant as the new Director of ... of Core Implementations. These two new leadership positions were ... service by ensuring that iLab continues to meet the ... last four years, iLab has been deployed at over ...
(Date:12/19/2014)... 18, 2014 With only 2 weeks ... special on Sartorius Biohit products . The product specials ... Picus Electronic Pipette Trade-in Program, and free pipette tips. ... officers around the world. They are ideal for lab ... include:, ,     Full volume range of 0.1 ...
(Date:12/19/2014)... , Dec. 18, 2014   ISN has ... Safety Performance Indicators publication series. With data ... activity reported in 2013 within its online contractor management ... safety key performance indicator (KPI) statistics. ... U.S. publication is available in two industry ...
(Date:12/17/2014)... Based on the revenues gained ... market is dominated by four major players contributing ... These players include GE Healthcare (U.K.), Siemens AG ... , Full Report Copy at http://www.marketsandmarkets.com/Market-Reports/surgical-imaging-market-210534462.html ... be attributed to its strong product portfolio, which ...
Breaking Biology Technology:iLab Solutions Announces Two New Leadership Positions to Meet the Needs of Its Growing Customer Base 2Major Pipette Distributor Pipette.com Announces Sartorius Year End Specials 2ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 2ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 4
... Arena Pharmaceuticals,Inc. (Nasdaq: ARNA ) announced today ... Investor Conference on October 28, 2008 at 2:00 p.m.,Pacific ... Hotel in La,Jolla, California. Jack Lief, Arena,s President and ... the company, including its,clinical development and discovery programs., ...
... Neb., Oct. 22 Transgenomic Inc. (OTC,Bulletin Board: TBIO) announces the following Webcast:, ... Release Conference ... p.m. Eastern, Where: http://www.transgenomic.com/events.asp?id=6 , How: ... the web at the ...
... Techne Corporation,s,(Nasdaq: TECH ) consolidated net earnings ... $28.6 million or $.74 per diluted share,compared with $23.1 ... ended,September 30, 2007. Net earnings as a percentage of ... last year to 41.2% for the quarter ended,September 30, ...
Cached Biology Technology:Arena Pharmaceuticals to Present at the BIOCOM Investor Conference 2Arena Pharmaceuticals to Present at the BIOCOM Investor Conference 3Webcast Alert: Transgenomic Inc. Announces Third Quarter 2008 Earnings Release Conference Call Webcast 2Techne Corporation Releases Unaudited First Quarter Results for Fiscal Year 2009 2Techne Corporation Releases Unaudited First Quarter Results for Fiscal Year 2009 3Techne Corporation Releases Unaudited First Quarter Results for Fiscal Year 2009 4Techne Corporation Releases Unaudited First Quarter Results for Fiscal Year 2009 5
... Useful for the mechanical harvesting of ... and ensures even contact with the growth ... and 75cm flasks • Individually wrapped • ... Linkage: This CLS number is a new ...
... The MagneGST™ Protein Purification System ... method for the purification of glutathione-S-transferase ... particles (MagneGST™ Particles) are used to ... crude or cleared lysate using either ...
... compact, versatile system that simultaneously harvests and ... microplates into a solid filter supports for ... gamma counter. The FilterMate is ideal for ... as cell proliferation, receptor binding, nucleic acid ...
... screening project: , 384 Individual ... shape-diverse mixtures of 4 (5 uL each) , ... Individual compounds are dissolved in DMSO at ca. ... Supplied in 5 96-well trays. Dilute library with protein ...
Biology Products: