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:12/10/2014)... Dec. 9, 2014 CIE San Diego has ... provides the connective tissue that enhances care coordination among ... easily share client-level information; earned a second $1 million ... organizations serving seniors aging in community and; will be ... December 11 th 4-6p. CIE San ...
(Date:12/5/2014)... 2014 Increased emphasis on product quality, ... testing and inspection technologies. The convergence of industries ... range of innovative test solutions. This trend is ... which is generally more inclined towards communication, media ... strategies of test equipment vendors will cater to ...
(Date:12/3/2014)... 2, 2014   Marvin Test Solutions , ... solutions for military, aerospace, and manufacturing organizations, today ... successful TS-900 PXI semiconductor test platform . ... high-end systems to customers at a fraction of ... traditional ATE. "Our semiconductor customers ...
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 4Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 2Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 3Emerging Technologies Enable Smarter Monitoring of Assets, Push Industrial Testing, Inspection and Monitoring Market 4Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3
... with type 1 diabetes may be able to grow ... Georgetown University Medical Center (GUMC) researchers who presented their ... 50th annual meeting in Philadelphia. Their laboratory and animal ... stem cells (SSCs) extracted from testicular tissue can morph ...
... delay treatment of breast cancer just because a woman is ... German Breast Group. This suggestion is based on study ... infant. Loibl presented this data at the 33rd Annual CTRC-AACR ... "At the time we started the study in 2003, there ...
... of some of the most economically damaging organisms that infect ... that causes powdery mildew and the water molds that cause ... cruciferous vegetables and other crops. , "We have been studying ... Kamoun, head of the Sainsbury Laboratory on the Norwich Research ...
Cached Biology News:'Grow your own transplant' may be possible for men with type 1 diabetes 2Unique needs and outcomes of pregnant women with breast cancer identified 2Gene hunters tackle crop diseases 2
(Date:12/24/2014)...  Rock Creek Pharmaceuticals, Inc., (NASDAQ: RCPI ... Trial Application (CTA) with the United Kingdom,s ... regulatory approval to initiate clinical trials for the continued ... Contingent on the Company receiving CTA regulatory approval, the ... assess the safety, tolerability and dose escalation of Anatabine ...
(Date:12/22/2014)... RepliCel Life Sciences Inc. (OTCQB: REPCF) (TSX.V: RP), a ... of autologous cell therapies, announced today the publication of ... conjunction with co-authors from Kyoto University and the University ... clinical research using dermal sheath cup (DSC) cells to ... paper entitled " Hair Follicle Dermal Stem Cells Regenerate ...
(Date:12/22/2014)... The American Journal of Hematology/Oncology, a ... editorials addressing developments and pathways related to oncological ... article exploring the role of follicle-stimulating hormone (FSH) ... prostate cancer. , The article references seminal ... there could be a connection to prostate cancer ...
(Date:12/19/2014)... Charm Sciences is pleased to announce that ... Aflatoxin M1 in raw commingled milk is the first ... The peer reviewed report of the validation by Technology ... and Fisheries Research (ILVO-T&V) has been published by the ... most toxic aflatoxin and a known carcinogen, can be ...
Breaking Biology Technology:Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 2Rock Creek Pharmaceuticals Files Clinical Trial Application in the UK for Clinical Trials of Anatabine Citrate Formulations 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 2Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 4Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 5Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 4Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2
... Ltd. (Nasdaq: XTLB ; TASE: XTL) announced today ... week in accordance with its articles of association due to ... place at the Company, Building 3, Kiryat Weizmann Science Park, ... time on March 18, 2009.Any proxy votes received at any ...
... Abt Associates announced it has been awarded a 5-year, ... International Development (USAID) to lead a team of organizations ... Mexico.Mexico is a member of the North American Free ... the United States. USAID programs support Mexican efforts ...
... Pharma, Inc. (NYSE Alternext US: DDD) today reported financial ... 31, 2008. The Company will host a live ... (Eastern Daylight Time)."Last year was an important period for ... Ph.D., M.B.A. "Utilizing our unique CDT(R) platforms, we made ...
Cached Biology Technology:USAID Selects Abt Associates to Lead Team in Strengthening Mexico Private Sector Competitiveness 2SCOLR Pharma, Inc. Reports Fourth Quarter 2008 Financial Results 2SCOLR Pharma, Inc. Reports Fourth Quarter 2008 Financial Results 3SCOLR Pharma, Inc. Reports Fourth Quarter 2008 Financial Results 4SCOLR Pharma, Inc. Reports Fourth Quarter 2008 Financial Results 5SCOLR Pharma, Inc. Reports Fourth Quarter 2008 Financial Results 6SCOLR Pharma, Inc. Reports Fourth Quarter 2008 Financial Results 7SCOLR Pharma, Inc. Reports Fourth Quarter 2008 Financial Results 8
MAb to HSV-2, gG-2 HSV-2 Glycoprotein G-2...
Immunogen for A300-655A was a phosphorylated synthetic peptide, which represented a portion of human RNA Polymerase II (GeneID 5430) around serine 5 of the C-terminal repeat YSPTSPS....
human Exodus-2 Research Focus: cytokine/growth factor Storage Temperature: -20C Shipping Temperature: 4C...
MAb to IgG2 (Fc gamma-2) IgG2 (Fc, gamma-2 epitope)...
Biology Products: