What's New at the OTAG for April to June of 1997

Entries between April and June 97

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Re: Comment on Executive Summary, Vol I: The excellent OTR trends study Howard presented to the AQA workgroup (but not submitted electronically for posting and review on AQA website?) was the...; Submitted by Poirot Richard on 6/26/97

Re: Comment on Executive Summary, Vol I: Don't agree with Howard's claim that "There is no basis for inclusion of 30 ppb" in the range of 30-40 ppb
employed to describe average summertime ...; Submitted by Poirot Richard on 6/26/97

Volume I: EXECUTIVE SUMMARY (Rev June 13, 1997) with animations: Final version of the Air Quality Analysis Workgroup's Volume I: Executive Summary with animations. It is a compilation of key results from the OTAG Ai...; Submitted by Webmaster on 6/25/97

Re: Re: Re: Comment on Executive Summary, Vol I, peak shaving benefits: I agree that transported ozone from urban centers contributes significantly to regional ozone, but "peak shaving" may not reduce the regional ozone. ...; Submitted by Schichtel Bret on 6/21/97

Spatial Clustering of Ambient Ozone in Eastern U.S.: Ambient ozone data from AIRS data were used to perform a simple analysis of the spatial correlation structure of daily maximum 8-hour ozone levels. ...; Submitted by Webmaster on 6/18/97

Re: Re: Comment on Executive Summary, Vol I: I would like to emphasize that a significant portion of the high regional ozone is a result of transported ozone from urban areas thus " peak shaving"...; Submitted by West Jeffrey on 6/18/97

Re: Re: Comment on Executive Summary, Vol I: I can not think of any justification to lower the range to 20 ppb.; Submitted by West Jeffrey on 6/18/97

Final Report, Volume III: Summaries of Individual AQAWG Analyses OTAG Air Quality Analysis Workgroup: A brief summary and critical review was prepared for most of the AQAWG analyses identified in Table 1 in Volume II: Summary and Integration of ...; Submitted by Webmaster on 6/16/97

PowerPoint OTAG AQA WG Presentation (Rev, June 13, 97 ): Revision of the Slides-and-bullets presentation of the AQA WG Executive Summ...; Submitted by Webmaster on 6/16/97

OTAG Air Quality Analysis Workgroup Results Summary: Final version of the OTAG Air Quality Analysis Workgroup Results Summary. It is the AQAWG summary that will be included in the OTAG Executive Summary...; Submitted by Webmaster on 6/16/97

Volume I: EXECUTIVE SUMMARY (Rev June 13, 1997): Final version of the Air Quality Analysis Workgroup's Volume I: Executive Summary. It is a compilation of key results from the OTAG Air Quality Analy...; Submitted by Webmaster on 6/16/97

Volume II: Summary and Integration of Results OTAG Air Quality Analysis Workgroup: Final version of the Air Quality Analysis Workgroup's Volume II: Summary and Integration of Results OTAG Air Quality Analysis Workgroup. Summaries o...; Submitted by Webmaster on 6/16/97

Re: Comment on wind speed and ozone relationship: Hey this is fun! Lets set up a blue ribbon committee to study if gravity causes apples to fall. I would propose Sir I. Newton to chair it. Of course l...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on the average range of ozone transport: This is why we have been distinguishing the different scales: Ozone as pollutant mass is transported 150-500 miles from the source of its precursors. ...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: Weeday-weekend analysis: Urban area VOC (plus NOX) emission reductions shave urban peaks. Regional O3 formation is NOx limited.; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: This is how: ( From What are the implied ranges of ozone transport):
"The directly attributable influence of specific urban areas can be traced to ...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: If there are OTAG-scale O3 trends as (not just sub-regional trends), it would be interesting to see. What do you suggest specifically?; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: Our fault - improper figure labeling . Lets call it a case of misread figure captions. However, based on urging from Rich Poirot, Figure 7a was replac...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: The ozone transport range of 150-500 miles has been on the Workgroup table throughout the past year. The local, sub-regional and regional ranges you a...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: The argument is simple: if most of the excess O3 within OTAG is anthropogenic, emitted inside OTAG, then it is controllable, in priciple. Of course, a...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: I have no problem with making the upper end 50 if we also make the lower end 20 and indicate that it is a range. So, it would read:

...range of...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: Fair comment, the Ohio River Valley is industrial and urbanized, so the new wording is:

...near major metropolitan areas and along the industri...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: Jeff, I am not sure what to make of the 'at 50-80 ppb'. The scale of average ozone transport should not depend on concentration. Of course, the scale ...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: I used 'peak shaving' for crispness and brevity of the abstract but it meant to say the same as Jeff's wording. What do you say?; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: Fine, lets clean it up, but we have been calling OTAG a domain, not a region, so it will read:

Emissions in the central part of the OTAG domain...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: Boy, if that little word THE was'n there..

The wording in the body of ExecSum says:

.. urban nonattainment areas contribute significantl...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: It may be difficult to assemble a Politically Correct set of 'Special Thanks..' to the workgroup members or to anyone/anything else. The co-chair pers...; Submitted by Husar Rudolf on 6/13/97

Re: Comment on Executive Summary, Vol I: Well, we have not used references in ExesSum...However, on the web version there should be references and links to the supporting reports. Some of us ...; Submitted by Husar Rudolf on 6/13/97

Final Report, Volume III: Summaries of Individual AQAWG Analyses OTAG Air Quality Analysis Workgroup: A brief summary and critical review was prepared for most of the AQAWG analyses identified in Table 1 in Volume II: Summary and Integration of Resu...; Submitted by Webmaster on 6/12/97

Final Report, Volume II: Summary and Integration of Results OTAG Air Quality Analysis Workgroup: During the summer months, high ground-level ozone concentrations are observed within and downwind of many of the large urban areas in the eastern U...; Submitted by Webmaster on 6/12/97

Re: Re: Comment on Executive Summary, Vol I: Wait a minute, maybe Howard & I are commenting on different Figure 7a's or mixed captions? From my web-browsers view the caption for Figure 7a (ozone ...; Submitted by Poirot Richard on 6/11/97

Re: Comment on Executive Summary, Vol I: Personally, I find figure 7a to be among the most useful illustrations in the report - especially given objective of conveying an "Executive Summary"....; Submitted by Poirot Richard on 6/11/97

Anatomy of the July 1995 Regional Ozone Episode: An animation illustrating how airmass stagnation and circulation over the Midwest leads to accumulation of ozone over which is subsequently transport ...; Submitted by Schichtel Bret on 6/11/97

Comment on Executive Summary, Vol I: each diagram should have a reference.; Submitted by West Jeffrey on 6/11/97

Comment on Executive Summary, Vol I: Comment on abstract: You might also consider a acknowledgment page to the major group participants.; Submitted by West Jeffrey on 6/11/97

Comment on Executive Summary, Vol I: Comment on abstract: 5th para. additional sentence to be added at end.. "However, data analysis indicates that urban areas are still the major source ...; Submitted by West Jeffrey on 6/11/97

Comment on Executive Summary, Vol I: Comment on abstract: 5th para. 4th sentence should read " Emissions in the central part of the OTAG region....."; Submitted by West Jeffrey on 6/11/97

Comment on Executive Summary, Vol I: Comment on the abstract: 5th para. 3rd sentence delete " urban 'peaking shaving' " and insert "lowering the maximum ozone values found in urban non...; Submitted by West Jeffrey on 6/11/97

Comment on Executive Summary, Vol I: Comment on the abstract: 3rd para. 6th sentence should read "(300-500 miles at 60-80ppb)"; Submitted by West Jeffrey on 6/10/97

Comment on Executive Summary, Vol I: Comment on the abstract: 2nd para. 2nd sentence - delete "and along the industrial Ohio River Valley" or insert the words "urbanized and" before indu...; Submitted by West Jeffrey on 6/10/97

Comment on Executive Summary, Vol I: Comment on the abstract: 2nd para. 1st sentence should read "30-50ppb" as agreed at a earlier meeting;; Submitted by West Jeffrey on 6/10/97

Comment on Executive Summary, Vol I: Ozone is indeed controllable by measures within the OTAG domain. The high ozone concentrations in excess of the tropospheric background originate from...; Submitted by Feldman Howard on 6/10/97

Comment on Executive Summary, Vol I: The distances of ozone impact deduced from multiple types of analysis range from 150 to 500 miles. The directly attributable influence of specific u...; Submitted by Feldman Howard on 6/10/97

Comment on Executive Summary, Vol I: Strong ventilation with high wind speeds prevents the local build-up near the sources (Figure 6b), but contributes to long-range transport and regio...; Submitted by Feldman Howard on 6/10/97

Comment on Executive Summary, Vol I: Ten year trends show that the number of 120 ppb, 1-hr exceedances has declined markedly over the past decade in areas like the northeastern Ozone Tr...; Submitted by Feldman Howard on 6/10/97

Comment on Executive Summary, Vol I: During the dirtier, high-ozone days (the 90th percentiles) the urban influence is very pronounced but confined to about one or two hundred miles fro...; Submitted by Feldman Howard on 6/10/97

Comment on Executive Summary, Vol I: During the summer ozone season, the OTAG domain is periodically ventilated by air coming from outside the domain where ozone concentrations average ...; Submitted by Feldman Howard on 6/10/97

Comment on Executive Summary, Vol I: VOC controls appear to be effective for urban 'peak shaving' while NOX emission reductions are likely to be effective for regional ozone reductions.<...; Submitted by Feldman Howard on 6/10/97

Comment on Executive Summary, Vol I, what is meant by Ozone within the domain is controllable?: The anthropogenic ozone originates from within the OTAG domain and therefore it is controllable with measures inside the domain. The strong weekly cyc...; Submitted by Feldman Howard on 6/10/97

Comments on Executive summary Vol I, modeling results: The [COMMENT: add "OTAG"] modeling results have been evaluated based on the model performance and on the representativeness of the selected modeling...; Submitted by Feldman Howard on 6/10/97

Comment on the average range of ozone transport: The average range of ozone transport distance implied from an array of diverse methods is between 150 and 500 miles. However, the perceived range, de...; Submitted by Feldman Howard on 6/10/97

Comment on wind speed and ozone relationship: The analysis of ozone data along with transport winds shows that low windspeeds, <3m/sec, cause ... [COMMENT: "allow" is a more accurate descriptor....; Submitted by Feldman Howard on 6/10/97

What are the ozone concentrations at the edge of the OTAG domain?: The analysis of more than 600 monitoring stations data shows that ozone at the edges of the OTAG domain corresponds to the tropospheric background o...; Submitted by Feldman Howard on 6/10/97

Final Report, Volume II: Summary and Integration of Results adn Vol III: During the summer months, high ground-level ozone concentrations are observed within and downwind of many of the large urban areas in the eastern U...; Submitted by Webmaster on 6/5/97

PowerPoint OTAG AQA WG Presetation (Rev, June 2, 97: Revision of the Slides-and-bullets presentation of the AQA WG Executive Summ...; Submitted by Husar Rudolf on 6/1/97

Volume I: EXECUTIVE SUMMARY (Rev June 2, 1997): Revised version of the Air Quality Analysis (AQA) workgroup Executive Summary to the Policy Group.; Submitted by Guinnup David on 6/1/97

temperature spatial scale confusing: Not clear on paragraph on spatial temperature vs ozone.

Also,unsure why 8 hr avg proposed standard is mentioned.

Urban areas(where most ...; Submitted by Dege John on 5/27/97

Volume I: EXECUTIVE SUMMARY (Rev May 26, 1997): Revised version of the Air Quality Analysis (AQA) workgroup Executive Summary to the Policy Group.; Submitted by Guinnup David on 5/26/97

What was temperature & monitor elevation vs cities?: Would like to see the temperatures associated with the ozone readings. Your conclusions are consistent with previous science used for ozone models th...; Submitted by Dege John on 5/22/97

Vince Shiau has registered: Submitted by Shiau Vince on 5/22/97

Re: Re: Draft Vol. 1 Need revision to section on ozone and climatical data: Would like to see data for TN and south that you are referring to.; Submitted by Dege John on 5/22/97

Re: Re: Draft Vol. 1 Need revision to section on ozone and climatical data: Would like to see the data for Atlanta.; Submitted by Dege John on 5/22/97

Re: Re: Draft Vol. 1 Need revision to section on ozone and climatical data: yes, with reductions in VOCs from lower vapor pressure gasoline and lower tailpipe emissions, the benefits have been lower numbers of exceedances. Hig...; Submitted by Dege John on 5/22/97

Re: Re: Draft Vol.1 Revised to include factual references: yes, I included my references for information purposes for the comment.; Submitted by Dege John on 5/22/97

Re: Re: Draft Vol. 1 Changes to: Texas has dne extensive evaluation of the NOx reduction disbenefit and highlights the difficulty in reducing ozone levels below the standard without i...; Submitted by Dege John on 5/22/97

Jerry Sheehan has registered: Ambient air monitoring; Submitted by Sheehan Jerry on 5/20/97

Re: Re: Vol. 1 draft: Model reliability Misstated.: yes. Model shortcomings are stated; was thinking of the methods used to determine biogenic emissions; bag studies were used to determine emissions(mea...; Submitted by Dege John on 5/20/97

tim leonguerrero has registered: data analysis, modeling; Submitted by leonguerrero tim on 5/20/97

Is ozone transported or its precursors?: Is ozone transported, or its precursors? If it is only its precursors, what implications would this have conisdering possible long range transport of...; Submitted by Dege John on 5/19/97

Recommend additional analysis on model predicted background: EPA and other documents state that the background concentratins of ozone are 30 to 40 ppb. However, review of data for National Parks reveals concent...; Submitted by Dege John on 5/19/97

Vol 2 misstates the daily background maximums: The correct Spatial and Temporal Pattern of ozone in OTAG is
illustrated by the following data; Vol 2 misstates the daily
maximums as 30-40 ppb ...; Submitted by Dege John on 5/19/97

TOP 10 OTAG/AQA Conclusions: Richard Poirot: Top 10 things I wish we had gotten around to/ had time for/ might take up in the future:
1. Emissions Data (a): Historical trends (NOx and VOC) - m...; Submitted by Richard Poirot on 5/17/97

Re: Re: Re: Draft Vol. 1 Changes to: Sorry for my confusing statement. I meant that 'disbenefit' can (and from the data does) occur whenever NOx scavenging substantially reduces ambient O...; Submitted by Husar Rudolf on 5/16/97

Re: Drfat Vol 1 Summary does no accurately reflect pattern of ozone: The summertime O3 concentrations you list seem to high when compared with the most recent trend analyses. In the report "Spatial Pattern of Daily Max...; Submitted by Schichtel Bret on 5/16/97

Comments on Vol 1. - Pattern of Ozone on Edges of Region: In looking at some of the maps, shouldn't we flag the SW corner of the region as an additonal area that may have some ozone levels higher than what we...; Submitted by Long David on 5/16/97

Re: Re: Draft Vol. 1 Changes to: I disagree with the allegation that the "red hot" disbenefit maps are from in the middle of the night. The work done by LADCo for the Chicago nonatta...; Submitted by Long David on 5/16/97

TOP 10 OTAG/AQA Conclusions: Richard Poirot: 1. Ozone transport occurs over multiple scales of distance and direction, and on any given day can be predominantly influenced by local (surface) flow...; Submitted by Richard Poirot on 5/16/97

Re: Draft Vol. 1 Incomplete on: The comment that “elevated point sources have little or no affect on urban areas” seems inconsistent with routine plume mapping studies that show ozon...; Submitted by Husar Rudolf on 5/15/97

Re: Draft Vol. 1: Your suggestion that on the average, the Nashville urban plum does not extend ( or is indistinguishable from background) beyond 30 miles can not be re...; Submitted by Husar Rudolf on 5/15/97

Re: Draft Vol. 1 suggestions:: Yes, O3 is in photostationary state equilibrium near the sources, but once O3 is fully formed and the NOx precursor is gone, O3 is removed by dry depo...; Submitted by Husar Rudolf on 5/15/97

Re: Draft Vol. 1 Need revision to section on ozone and climatical data: High temperature appears to be more of a coincidental then causal factor for high ozone. In the Northeast, the origin of both hot and high O3 airmasse...; Submitted by Husar Rudolf on 5/15/97

Re: Draft Vol.1 Revised to include factual references: The Executive Summary to the Policy Group does not contain references to any specific reports. It is (collective) 'expert opinion' by the AQA Workgrou...; Submitted by Husar Rudolf on 5/15/97

Re: Draft Vol. 1 Changes to: "NOx reductions can actually increase ozone levels and increase the population exposure".I presume you refer to the famous disbenefit thing popularize...; Submitted by Husar Rudolf on 5/15/97

Re: Vol. 1 draft: Model reliability Misstated.: The model overprediction of isoprene apears to be substantial. Several 'stakeholder' presenters stressed that point and backed with analysis. Aren't t...; Submitted by Husar Rudolf on 5/15/97

Re: comments on the AQA results summary and Vol I ES: 1. Ozone trends. Yes, long-term ozone trends should be included

5. OTAG-well defined control domain?. If substantial man-made ozone would enter...; Submitted by Husar Rudolf on 5/14/97

Voyager Script: I have been doing research about the air quality by using
"Hourly US AIRS Data" in CAPITA. Voyager software makes me
deal with those data sets i...; Submitted by Kim Hag-Yeol on 5/14/97

TOP 10 OTAG/AQA Conclusions: jeffrey west: All ozone nonattainment areas should be considered ozone problem areas.; Submitted by jeffrey west on 5/14/97

ghjkhgkj: ghjkhkj; Submitted by Mayes Peter on 5/13/97

Elfrun Lehmann has registered: Modeling ozone concentrations based on the distribution of biogenic emissions in the area of Washington-Baltimore; Submitted by Lehmann Elfrun on 5/13/97

Volume II: EXECUTIVE SUMMARY (Rev May 8, 1997): Revised version of the Air Quality Analysis (AQA) workgroup Executive Summary Volume II to the Policy Group.; Submitted by Stoeckenius Till on 5/9/97

TOP 10 OTAG/AQA Conclusions: Howard Feldman: In some regions of the OTAG domain, peak ozone concentrations and the number of exceedances have declined dramatically over the last 15 years.; Submitted by Howard Feldman on 5/9/97

TOP 10 OTAG/AQA Conclusions: David Long: Short range ozone transport (<150 miles) appears to be far more important than longer range transport.; Submitted by David Long on 5/9/97

Re: Draft Vol. 1 Need revision to section on ozone and climatical data: data from NY have shown that ozone concentrations have decreased in the last 15 years despite increases in hot (>90F) days. the ratio between exceeda...; Submitted by Feldman Howard on 5/9/97

comments on results summary and ES: comments on volume I ES and the results summary

1. "Trends" have been specifically identified in the tasks yet all trends information has bee...; Submitted by Feldman Howard on 5/9/97

comments on the AQA results summary and Vol I ES: comments from Feldman on volume I ES and the results summary

1. "Trends" have been specifically identified in the tasks yet all trends inform...; Submitted by Feldman Howard on 5/9/97

OTAG Air Quality Analysis Results Relevant to Assessment of Coarse Grid States (Draft): Summary of AQA results relevant to the Policy group's discussion of UAM-V fine grid ozone contributions from locations in the coarse grid.; Submitted by Poirot Richard on 5/9/97

Connie Simmons has registered: Air quality analysis(and monitoring)relating to ozone formation and transport(local, regional, and long range).
Air quality modelling relating to o...; Submitted by Simmons Connie on 5/8/97

Vol. 1 draft: Model reliability Misstated.: Do air quality data support the use of UAM-V model use to evaluate control options?

YES, but general directiion only. UAM V model runs in Houst...; Submitted by Dege John on 5/8/97

Draft Vol. 1 Changes to: Do air quality data suggest high-leverage means for controlling ozone?

In urban areas where ozone is VOC limited, the primary control strategy ...; Submitted by Dege John on 5/8/97

Draft Vol.1 Revised to include factual references: Is there evidence that precursor emission changes cause ozone concentration changes?

There is empirical evidence that anthropogenic emission ch...; Submitted by Dege John on 5/8/97

Draft Vol. 1 Need revision to section on ozone and climatical data: The following better reflects the affects of climate on ozone levels:

Comparison of episodes with climatological data?

Generally, HIGH T...; Submitted by Dege John on 5/8/97

Draft Vol. 1 suggestions:: The following changes are recommended:
What is the lifetime of ozone and precursors over the OTAG region?

Ozone in ambient air is created an...; Submitted by Dege John on 5/8/97