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

stries in Eastern states. The dramatic reduction in emissions over the subsequent four years provided a real-world experiment for the researchers to test how well computer models predict improvements in air quality.

"We found that even when we tried to model things with the best available emissions and the best available meteorology, we still had a gap, especially in the Northeast states, that couldn't be explained," he said.

In the SIP Call regions, the researchers found the simulated drop in ozone was 4.6 ppb, while the observed drop was 8 ppb, a significant difference. Faster-than-expected reductions in NOx emissions may explain some but not all of that gap. The remaining gap may result from inaccuracies in how the model represents the chemistry and transport of air pollutants, Cohan said.

"How ozone responds to changes in NOx and hydrocarbons is a nonlinear chemistry," Cohan said. "So it's certainly possible that even the best models could be slightly inaccurate in defining those relationships. It tells us that, as modelers, we need to revisit the formulations, especially the chemistry."

While it may be preferable for models to be a bit conservative rather than too aggressive in predicting ozone improvements, Cohan said, the models are intended to represent air pollution as accurately as possible. A study by Cohan's research group last year showed that regulatory modeling by states tended to slightly under-predict the ozone reductions that were actually achieved.

"The goal of everyone in the process is to reach attainment in the most cost-effective manner possible, and we need accurate models to inform those decisions," Cohan said.


'/>"/>
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:11/21/2014)... REDMOND, Wash. , Nov. 20, 2014 ... access for the Internet of Things (IoT), today announced ... position of chief operating officer. Previously a strategic advisor ... marketing, finance, and operations. Mr. Traynor is based out ... . He reports to Chris Muench , ...
(Date:11/18/2014)...   News Highlights: ... The Partners Data Lake, an agile data and ... will allow researcher and clinicians to explore and ... lives of patients , The Partners Data ... the Partners system, breaking down physical barriers for ...
(Date:11/15/2014)...  While we may still be a few years away ... Trek" to gain instant access to all that ailed his ... and tablets for monitoring and measuring our health are cropping ... seem a tad Orwellian to some, but a new survey ... technological opportunities into their healthcare regime. These are ...
Breaking Biology News(10 mins):C-Labs Names Former Microsoft and Bsquare Executive as Chief Operating Officer 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 3Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 5Americans May Be Ready for a Brave New World of Healthcare 2Americans May Be Ready for a Brave New World of Healthcare 3Americans May Be Ready for a Brave New World of Healthcare 4
... of Velociraptor rewrites evolutionary charts , The recent ... that dromaeosaurs, a group of carnivorous theropods that ... originated much earlier than previously thought. Rather than ... traced back to the Jurassic, possibly as far ...
... a pheromone emitted by older male elephants in musth influences ... surrounding elephants behave, a new study has found. , ... University of Auckland in New Zealand say the release of ... frontalin, depends on whether the male elephant is mature enough ...
... immune system to absorb and digest pathogenic intruders. Some ... multiply within the macrophages. Cell biologists at the University ... recently publication in the journal 'Traffic' (Vol. 6, No. ... pathogens escape the 'stomach' of the macrophages which might ...
Cached Biology News:Newly discovered birdlike dinosaur is oldest raptor ever found in South America 2Newly discovered birdlike dinosaur is oldest raptor ever found in South America 3Newly discovered birdlike dinosaur is oldest raptor ever found in South America 4Male elephants woo females with precise chemistry 2Male elephants woo females with precise chemistry 3Dangerous tricksters: Some bacterie use immune cells to reproduce 2Dangerous tricksters: Some bacterie use immune cells to reproduce 3
(Date:11/21/2014)... BELLINGHAM, Washington, USA (PRWEB) November 19, 2014 ... used in our lives was shared with more than ... undergraduate and postgraduate students from the University of Otago ... Outreach Grant . The Otago students, members of the ... Southland New Zealand in early September, giving children from ...
(Date:11/21/2014)... (PRWEB) November 20, 2014 The November ... available as an open access journal featuring the following ... fluorescent proteins to preserve photoresponsiveness in the retina , ... fluorescent in situ hybridization using chromogenic substrates in zebrafish ... DNA, RNA, and protein electrophoresis , Nuclear ...
(Date:11/21/2014)... , Nov. 20, 2014 Polaris Group ... dosed in its Phase 1 trial of ADI-PEG ... the treatment of malignant pleural mesothelioma (MPM) and ... conducting clinical trials on ADI-PEG 20, both as ... the treatment of several other indications, including breast ...
(Date:11/18/2014)... RPS Diagnostics (RPS®) – a ... announces its third annual partnership of the Centers ... About Antibiotics Week from November 17-23. , Get ... designed to highlight the coordinated efforts of CDC, ... for-profit partners to provide education about the importance ...
Breaking Biology Technology:Optics and photonics outreach programs share science, spark fascination with light 2Optics and photonics outreach programs share science, spark fascination with light 3BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 2BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 3Polaris Group Announces Treatment of First Patient in Phase 1 Study of ADI-PEG 20 plus Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma And Non-Squamous Non-Small Cell Lung Carcinoma 2RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 2RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 3
... Olympus has further,cemented its position as a leader ... exclusive and immediate deal to distribute the products of,Irish ... global,provider of ports for state-of-the-art laparoscopic operative techniques via,a ... now the exclusive,distributor for the full range of products ...
... 11 Peregrine Pharmaceuticals, Inc. (Nasdaq: PPHM ) today ... Directors, unexpectedly passed away on Wednesday. Dr. Waltz had been ... At the time of his death, Dr. Waltz served on ... , "The sudden loss of our ...
... Inc. ("Oncolytics") (TSX:ONC, NASDAQ: ONCY ) announced ... endpoint in its multi-centre Phase 2 clinical trial ... patients with various sarcomas that have metastasized to ... patients on study with significant, durable, clinically meaningful ...
Cached Biology Technology:Minimally Invasive Surgery: Olympus Further Enhances Credentials by Entering Into Exclusive Sales and Distribution Partnership With Market and Technology Leader Advanced Surgical Concepts 2Peregrine Pharmaceuticals Mourns Loss of Chairman Thomas A. Waltz 2Oncolytics Biotech Inc.'s REOLYSIN(R) Exceeds Primary Statistical Endpoint in U.S. Phase 2 Sarcoma Study 2Oncolytics Biotech Inc.'s REOLYSIN(R) Exceeds Primary Statistical Endpoint in U.S. Phase 2 Sarcoma Study 3Oncolytics Biotech Inc.'s REOLYSIN(R) Exceeds Primary Statistical Endpoint in U.S. Phase 2 Sarcoma Study 4
Fingerprinting II Basic software is used for analyzing fingerprint sample types (electrophoretic gels, HPLC and other chromatographic patterns, spectrophotometric and densitometric curves)....
...
Fingerprinting II cluster analysis is an optional module that adds dendrogram and phylogenetic tree construction, cluster and group significance, and congruence of techniques functions to the Fingerp...
... Ion Channel Cell Lines ,High Quality, Functionally-Validated, ... are well known for having a critical ... consequently have a key function in pain, ... ion channels have been investigated in therapeutic ...
Biology Products: