DOE New Particle Formation NPF Working Group Members

1
DOE New Particle Formation (NPF) Working Group
Members

• Name Affiliation
• Cynthia Atherton Lawrence Livermore Lab
• Fred Eisele NCAR
• Jerome Fast PNL
• Barbara Finlayson-Pitts UC Irvine
• Jose Jimenez UC Boulder
• Chuck Kolb Aerodyne
• Bob McGraw BNL
• Peter McMurry, Chair U. Minnesota
• William J. Shaw PNL
• Jim Smith NCAR
• Doug Worsnop Aerodyne
• Doug Wright BNL
• Rahul Zaveri PNL
• Renyi Zhang Texas AM

2
International NPF Working Group

• Markku Kulmala and Peter McMurry, co-chairs
• First meeting Hyytiälä, Finland, August 15-17,
  2005
• 50 participants from Austria (1), Belgium (1),
  Czech Republic (1), Estonia (2), Finland (18),
  Germany (6), Ireland (1), Italy (2), South Africa
  (1), Sweden (3), Switzerland (1), UK (4) and US
  (9)
• Second Meeting (tentative) Minneapolis, MN,
  September 9-10, 2006 (Friday Saturday before
  International Aerosol Conference)

3
DOE NPF Deliverables Instrumentation

• Thermal Desorption Chemical Ionization Mass
  Spectrometer (TDCIMS) for measuring composition
  of nanoparticles down to 6 nm
• Organics, inorganics (NCAR/UMN team)
• Fast Response SMPS (Jay Wang, BNL)

4
DOE NPF Deliverables Process Models for New
Particle Formation and Growth Rates

• Parametrized expressions for NPF Rates
• Sensitivity to H2SO4, organic acids, ions,
  NH3, preexisting aerosol, etc.
• Nucleation-Theorem Theory (McGraw), Laboratory
  measurments (R. Zhang, Finlayson-Pitts, McMurry),
  and Atmospheric observations (McMurry et al.)
• J3 nmAorganic acidH2SO4n?--
• J3 nmBH2SO4?--Carslaw, Kulmala
• J3 nm CH2SO42?--McMurry-Barrierless Nucl.
• Growth rates of freshly nucleated nanoparticles
  (NCAR/UMN team Aerodyne-UC Boulder)
• Contributions of H2SO4 organics

5
DOE NPF Deliverables Chemical Transport Models
for Aerosols

• Atherton, Fast, Wright, Madronich, McMurry (in
  collaboration with Y. Zhang, T. Russell and
  others)
• Number concentrations (NPF Rate)
• Mean size (growth rate) and size distribution

6
DOE NPF Deliverables Atmospheric Observations
NPF Growth

• Examples of Measurements
• Aerosol PSD gt3 nm, ions (0.5-6 nm), composition
  (TDCIMS, AMS), Nano TDMA,
• Gas H2SO4, NH3, organics (PTRMS)
• Field Study Locations
• Boulder, CO (2005-2006)
• Mexico City (2006)
• Forested Site (UMN/NCAR) (2007)

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Major Questions

• What gas phase organic compounds are likely to
  contribute to
• Nucleation
• Growth
• Can PTRMS measurements provide insights?
• Precursor species?
• Condensing or nucleating species?