Atmosphere-Surface Exchanges

Wednesday, January 31, 2018 -
09:00 to 10:00


- Introductions - 10min

- Discussion of IASOA WG and YOPP (Casati/Uttal) - 20min

- Discussion of YOPP (ALL) - 30min


IASOA Atmosphere-Surface Exchanges (Flux) Working Group

January 31, 2018


Attendees: Sara Morris, Taneil Uttal, Chris Cox, Barbara Casati, Alexander Schulz, Alexander Makshtas, Zen Mariani, Elena Konopleva/Akish, Gabriela Schaepman, Andrey Grachev, Chris Fairall, David Cook


Role Call of group members



  • YOPP is an international activity initiated by World Meteorological Organization’s World Weather Research Program (WWRP) at a component of the Polar Prediction Project (PPP)
  • YOPP will take place from mid-2017 go mid-2019 (want full annual cycle)
  • YOPP goal: to significantly advance our environmental prediction capabilities for the polar regions and beyond
  • YOPP verification task team: supersites multivariate process-based evaluation (model focused)
    • Supersites primarily IASOA observatories within the Arctic region (also have Antarctic supersites for YOPP)
    • Focusing on surface energy budgets, fluxes, clouds, turbulence, etc.
    • NWP model output, archived at high-frequency
  • Special Observing Periods were chosen (Feb-March & July-August) for Arctic and Antarctic
    • These periods are to concentrate focus on ensuring all obs available at during these periods (model output will remain the same during these SOPs as the rest of the year)
  • Drafted list of observations details available/contributing from each of the IASOA stations online
  • YOPP activities requiring observations/model validations from IASOA stations/observatories
  • YOPP planning to archive model data around IASOA stations
  • Observations require large effort to unify measurements and output formats
    • Create observatory “gold-files” where data is formatted into one format so easier to use by modeling community for comparisons
    • Will add in variables in addition to model requested data obs
    • Will determine time (hourly, 3-hourly, etc.) resolution of observations within file
    • Will only focus on special observing periods (for now)
  • Determine which method, or both (bulk or eddie-correlation) the flux WG will plan to distribute the gold-files using
    • Within gold-file give observations from both methods?
      • Or do we as observationalists make that expert decision?
    • Also have to think about sampling variability (and biases) from both methods
      • Bulk is less noisy, but need surface roughness estimate
    • Gold-file would give both methods and then let modelers compare against both
      • Can also see how the two methods compare during periods
    • Designating an individual to create these files (Elena Konopleva??)
    • Determining which algorithm or quality control techniques to use on gold-file outputs
  • Need to evaluate which instruments are available at each IASOA station for determining methods
  • Gold-files to also include parameters important for observations (even if not utilized by YOPP team analysis)



Action Items:

  • YOPP and IASOA discussion to continue online
  • Create table of available flux measurements at IASOA stations (Uttal, Konopleva, Morris)
Research Group: