18 Aug. 2003
Electronic Science Team Meeting

Notes

• Christoph and John reviewed the mission, large scale and regional, and the data sets. Focus was on the overall conceptual framework, data inputs, major smoke plumes over Canada and pollution over New England.
• Hurst, Elkins: Submitted flask data from North American sites
• ACATS needs flasks of cabin air to assess leak rates.
  • Flasks are in John Miller's office
• Q: What is time period needed for submission of ground station and other aircraft data to characterize background?
  A(scw): in order of priority:
  1. period of COBRA flts
  2. period before until ~April 2003
  3. entire year
  4. entire record
  
  
• Heather Graven: showed flask results, apparently superior signal/noise ratios for O₂:N₂ and low or non-existent drifts in Ar:N₂.
• Tony Grainger: Working on the aircraft winds. . . Concerned with moving the INS. Variations in the heading that would affect winds. Turned out pitch and roll measurements were more of an issue. Currently getting down to errors < 1 m/s, shooting for 0.5 m/s. Hoping for a week and a half for final data.
• Andy Black: showed flux and CO₂ for BERMS and Campbell River; suggested that the CO₂ may be suitable for ground-station dataset. COBRA-2003 initially hit the spring transition, later flight had strong uptake by the Aspen ecosystem, less by Douglas fir.
• Lin Huang: gave an overview of historical data for Fraserdale, Alert
• Maria Silva Dias
  1. First phase: Overall simulation for the whole campaign: 40 km resolution (inner grid), ~160 km resolution (outer grid) to get at larger-scale emissions
  2. 2nd phase: June 3rd Pease seabreeze as an example. Need to pick out cases that are most interesting. Science Team should help decide.
     First cut on BRAMS priorities:
     1. large scale simulations, followed by
     2. Harvard and
     3. Howland Forests.
     4. Gulf coast?
• Marc Fischer: gave an overview of ARM-CART CO₂, also looked at validation of STILT from concentration data and from comparison with ARM raobs.
• Synthesis (CHG): difficult to quantify a priori errors in biospheric fluxes-spatiotemporal covariances.
  -Paul Moorcroft: 1st order thing to do is to run model but then compare at flux towers. About the best you can do. Then substitute site-specific observed meteorology rather than the domain-wide meteorology.
  -SCW: could use remote sensing (e.g., MODIS) to get at spatiotemporal covariance. Did Steve Running express interest? Paul Moorcroft: the BU people may be interested.
  -Margaret Torn: ARM/CART could be interested in getting at spatiotemporal covariance

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Action Item List

• Ground station and other aircraft data needed in the archive.
• Set up discussion: PBL height-how to determine? Priorities and execution of major BRAMS runs. (maria, saulo, jcl and chg).
• Determine fires location, size for Asia and N. America; Talk to Paul Palmer about fires (jcl et al.)
• Determine where enhanced N₂O near HF come from? (ACATS team, jcl et al.)
• Scan in on-flight notes; use digital camera! (retiring admin.)
• Contact Steve Running and/or BU people about MODIS for vegetation, phenology (scw, moorcroft).
• Add photos of each flight to website (all).
• Harvard Forest data to the archive (jwm)

SCW: would like to have science team meetings every 6 weeks or as needed.