Atmospheric Chemical Mechanisms
December 10-12, 2008
The ARC, University of California Davis
Preliminary Program as of November 25, 2008
Wednesday – December 10, 2008
7:30 - 8:00 REGISTRATION and CONTINENTAL BREAKFAST
8:00 - 8:15Welcome & Introductions
Anthony Wexler, UC Davis
Ian Barnes, University of Wuppertal
8:15 - 9:00PLENARY LECTURE I
The Tropospheric Degradation of Volatile Organic Compounds: Issues and Uncertainties
Mike Jenkin,Atmospheric Chemistry Services
9:00SESSION A
uncertainties in chemical mechanisms: current status
and important issues
Moderator:Paul Ziemann, University of California, Riverside
This session will include mainly basic gas phase chemistry and some contributions on theory which aid mechanism development. Advances in aromatic hydrocarbon chemical mechanisms and biogenic mechanisms will feature prominently. Contributions on the chemistry of organic nitrates/ hydroperoxides are especially welcome, including new emerging methodologies for measurement of intermediates and products which will help improve mechanism elucidation and gas phase sources of HONO.
9:00 - 9:20Recent Advances in Aromatic Hydrocarbon Gas Phase Mechanisms
Ian Barnes,University of Wuppertal
9:20 - 9:40Uncertainties in Ozone / Terpene Mechanisms
George Marston, University of Reading
9:40 - 10:00Theoretical Studies of (Sesqui)Terpene Oxidation Systems
Luc Vereecken, University of Leuven, Belgium
10:00 - 10:20BREAK
10:20 - 10:40Evaluation and Reduction of a Detailed Chemical Mechanism for
Alphapinene Degradation and Subsequent Secondary Aerosol Formation
Karl Ceulemans, IASB-BIRA
10:40 - 11:00Are the Alkyl Nitrates Reservoirs or Sinks of Reactive Nitrogen?
Zhongming Chen, Peking University
11:00 - 11:45PLENARY LECTURE II
New Chemistries – EVIDENCE FROM FIELD EXPERIMENTS
Andreas Hofzumahaus, Jülich Research Center
11:45 - 1:15LUNCH
1:15 Session B
New evolVing chemistries
MODERATOR:George Marston, University of Reading
This session will cover new issues raised from recent field experiments and modeling studies such as i) the proposals of OH formation from isoprene derived organic peroxy radicals, ii) the fate of nitrate radicals in isoprene oxidation, which significantly affect NOx and ozone formation, iii) satellite observations of carbonyls, e.g. how existing mechanisms cope with simulating HCHO and glyoxal and iv) observations in polluted urban scenarios, e.g. Mexico City. While the focus of the session is gas phase, observations of organic aerosol, e.g. OOA vs. HOA, BSOA vs. ASOA, might also be addressed.
1:15 - 1:35Uncertainties in Radical Production, Oxygenates, and SOA Formation
Rainer Volkamer,University of Colorado at Boulder
1:35 - 1:55Cloud Processing
Barbara Turpin, Rutgers University
1:55 - 2:15Reactive Nitrogen Partitioning and Ozone Production in the Mexico City
Urban Plume
Anne Perring, University of California Berkeley
2:15 - 2:35Sensitivity of Ozone in Houston to New Radical Source Reactions
Greg Yarwood, Environ Corporation
2:35 - 2:55The NO2 Issue
Geoff Tyndall, National Center for Atmospheric Research
3:00 - 3:20BREAK
3:20Session C
gas phase to secondary organic aerosols
Moderator:Rainer Volkamer,University of Colorado at Boulder
This session will explore experimental and modeling investigations on the evolution of gas phase low-volatility organics which lead to or promote secondary organic aerosol formation. Issues relating directly to mechanisms for semi-volatiles, oligomer formation and the role of small organics in SOA formation may be addressed as well as phase transfer and surface processes.
3:20 - 3:40Chemical Mechanisms of SOA Formation from Alkanes and Alkenes
Paul Ziemann, University of California, Riverside
3:40 - 4:00Organic Aerosol in the Greater-Edmonton Air Shed: Primary and Secondary Components and their NOx Dependence
Craig Stroud,Environment Canada
4:00 - 4:20A Vapor Pressure Model Including Group-Group Interactions: Impact on
Secondary Organic Aerosol Yield
Steven Compernolle, Belgian Institute for Space-Aeronomy
4:20 - 4:40Representative Semi-Volatile Components in Atmospheric SOA Formation
Gordon McFiggans, University of Manchester
4:40 - 5:00Photosensitized Heterogeneous Ozone Processing on the Organic Coatings in the Atmosphere
Sašo Gligorovski, Universités d'Aix-Marseille - CNRS
5:00 - 7:00Poster Viewing and Reception
Thursday – December 11, 2008
7:30 - 8:00CONTINENTAL BREAKFAST
8:00 - 8:30PLENARY LECTURE III
The Chemistry of Secondary Organic Aerosol Formation
Rich Kamens, University of North Carolina Chapel Hill
8:30 - SESSION D
condensed and multiphase phase chemistry
Moderator:Barbara Turpin, Rutgers University
This session covers current issues in condensed, multiphase and heterogeneous chemistry including phase transfer, general surface processes, and liquid phase mechanisms as well as tactical approaches to interfacing liquid phase and gas phase mechanisms.
8:30 - 8:50Current Issues in Multiphase Chemistry
Hartmut Hermann, Leibniz Institute for Tropospheric Research
8:50 - 9:10Uptake of HO2 and N2O5
Joel Thornton, University of Washington
9:10 - 9:30Photo-Enhanced Deposition of Trace Gases at the Interface of Organic Surfaces
Christian George, University of Lyon
9:30 - 9:50Evidence for Photo-Induced Nucleation: Does the HO2 Radical Play a Role?
Aaron C. Noell,Caltech Jet Propulsion Laboratory
9:50 - 10:10BREAK
10:10 - 10:30Heterogeneous Uptake of N2O5: Field Determinations of Uptake Coefficients and Efficiency for ClNO2 Production
Steven S. Brown,NOAA Earth System Research Laboratory
10:30 - 10:50OzonolysisofOleic Acid Adsorbed to Polar and Nonpolar Aerosol Particles
Elias Rosen, University of North Carolina
10:50Session E
chemical mechanism evaluation
Moderator: William Carter, University of California, Riverside
Session covers smog chamber evaluations for all phases&comparison with field data, concentrating on mechanistic detail & chemical understanding rather thanmechanisms optimized to recreate for profiles (contributions in mechanism evaluation encouraged).
10:50 - 11:00EUROCHAMP-2
Ian Barnes,University of Wuppertal
11:00 - 11:20Problems and Progress in Using Environmental Chambers for
Evaluating Mechanisms
David Cocker, University of California, Riverside
11:20 - 11:40The Regional Atmospheric Chemistry Mechanism, Version 2 – An Update
Wendy Goliff, Desert Research Institute
11:40 - 12:00Gas-Phase Precursors to Anthropogenic SOA: Using the MCM to Probe Detailed Observations of Aromatic Photo-Oxidation
Andrew Rickard, University of Leeds
12:00 - 12:20Photochemical Formation of Secondary Organic Compounds in Urban
Plumes: A Case for Detailed Chemical Mechanisms
Roberto Sommariva, University of East Anglia
12:20 - 1:30LUNCH
1:30 - Session f
developments in Mechanism reduction techniques
MODERATOR:Mike Jenkin,Atmospheric Chemistry Services
Mechanism reduction and lumping is a key bridge to policy applications and is therefore an essential element in atmospheric chemistry model development. This session will include contributions on formal approaches to reduction, lumping and sensitivity analysis, e.g. high dimensional model representation and more chemical approaches as well as difficulties and uncertainties in reducing representations of SOA formation.
1:30 - 1:50Do We Need Huge Organic Mechanisms? If So, Observed j x HCHO Provides a Strong Check on VOC Oxidation Rate and Ozone Production
Robert B. Chatfield,NASA Ames Research Center
1:50 - 2:10Development of a Condensed SAPRC-07 Mechanism
William Carter, University of California, Riverside
2:10 - 2:30Development of Systematic Reduction Techniques to Describe the
SOA/VOC/NOx/O3 System
Bernard Aumont, University of Paris
2:30 - 2:50A New Condensed Toluene Mechanism for Carbon Bond
Gary Whitten, Smog Reyes
2:50 - 3:10A Common Representative Intermediates (CRI) Mechanism for VOC Degradation
Michael Jenkin,Atmospheric Chemistry Services
3:10 - 3:30BREAK
3:30 - 3:50Application of the Higher-Order Decoupled Direct Method for Impact of
Uncertainties in Chemical Reaction Rates on Model Sensitivities
Bonyoung Koo, ENVIRON International Corporation
3:50 - 4:10Modelling Smog Chamber Measurements of Unleaded (ULP), E5 and E10
Vehicle Exhaust Reactivities
Merched Azzi, CSIRO
4:10 - 4:45Meeting of Wednesday & Thursday Session Moderators
Friday – December 12, 2008
7:30 - 8:00CONTINENTAL BREAKFAST
8:00 - 8:50 PLENARY LECTURE IV
The Present State and the Future Direction of Air Quality Management
in California
Ajith Kaduwela, California Air Resources Board
8:50Session G
CHEMISTRY IN THE FREE troposPhere
Moderator: William Stockwell, Howard University
This session will examine new issues in upper tropospheric chemistry particularly those related to temperature dependent oxidation chemistry and climate change issues. Issues include alkoxy radical reactions, especially dissociation and isomerization vs. reaction with O2; pressure and temperature dependencies generally, e.g. for OH addition – how well do we know the kinetics? The pressure and temperature dependence of carbonyl photolysis is also relevant. Why don’t the models match the observed NO to NO2 conversions above the mixing height? How do we put these effects into global models?
8:50 - 9:10Oxidation Reactions at the Low Temperatures of the Upper Troposphere Alexandre Kukui,Service d'Aéronomie – CNRS
9:10 - 9:30NOy Chemistry in the Free Troposphere
William Stockwell, Howard University
9:30 - 9:50Temperature Dependencies of Reactions and Photolysis Processes of
Relevance to the Free Troposphere
John Orlando,National Center for Atmospheric Research
9:50 - 10:10Problems Above the Mixing Height
Stanley Sander, NASA Jet Propulsion Lab
10:10 - 10:30BREAK
10:30 - SESSION H
chemical mechanism implementation for policy
MODERATORs:Ajith Kaduwela, California Air Resources Board
Deborah Luecken, U.S. Environmental Protection Agency
Fundamental chemical issues and needs have been addressed in the preceding sessions. This session will focus on the difficulties of bridging fundamental knowledge with policy-making and the methods used for introducing chemical issues, especially emergent chemical science, in policy formation. New and innovative policy applications of chemical mechanisms rather than just applications are to be discussed in order to address whether the mechanisms currently available are fit for the purpose.
10:30 - 10:50Multi-Pollutant Policy Applications
Karen Wessonand Deborah Luecken, U.S. Environmental Protection Agency
10:50 - 11:10Scientific Support for Air Quality Policy Formulation in Europe
Dick Derwent, rdscientific
11:10 - 11:30Peer Review of SAPRC07
William Carter,University of California, Riverside
11:30 - 11:50Application of Extended SAPRC Mechanism to Study Effects of HRVOC
Emissions in a Severe O3 Nonattainment Area
Daewon Byun,University of Houston
11:50 - 12:10Reaction Rate Uncertainty in the Development of Control Strategies
Daniel Cohan, Rice University
12:10 - 1:10LUNCH
1:10 - 2:10SUMMARY OF SESSSIONS by Moderators
2:10 - 2:50PANEL DISCUSSION
Sustained Further Development in Atmospheric Chemistry Mechanisms
Panel:Mike Jenkin,Atmospheric Chemistry Services Dick Derwent, rdscientific
Paul Ziemann, University of California, Riverside
Deborah Luecken, U.S. Environmental Protection Agency
2:50 – 3:15Conference Summary
William Carter,University of California, Riverside
CONFERENCE SPONSORS
California Air Resources Board
U.S. Environmental Protection Agency
INTROP (The European Science Foundation’s Interdisciplinary Tropospheric Research Programme)
UC Davis Air Quality Research Center
American Chemistry Council