Community:Email 25may11

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This is a generic mailing to the CEDAR community sent 25 May 2011. Meetings and jobs are listed at under 'Community' as 'Calendar of Meetings' and 'CEDAR related opportunities'. CEDAR email messages are under 'Community' as 'CEDAR email Newsletters'. All are in 'Quick Links' on the main page.

(1) George Reid of the NOAA Aeronomy Lab in Boulder, Colorado died 6 May 2011. From Barbara Emery (emery at See also

(2) CEDAR-GEM hotel blocks until May 26, May 27 and June 4. From Barbara Emery (emery at See for CEDAR Summer Workshop and see for GEM Summer Workshop.

(3) CEDAR-GEM Modeling Challenge Workshop Announcement - model outputs due June 10. Tentative Agenda. Call for Ideas/Viewpont Presentations. From and See also and

(1) George Reid of the NOAA Aeronomy Lab in Boulder, Colorado died 6 May 2011.

From Barbara Emery (emery at

George Reid was a NOAA (National Oceanic and Atmospheric Administration) scientist emeritus at Boulder Colorado. He was head (1970-1972) of the Aeronomy Laboratory, now the Chemical Sciences Division of the Earth System Research Laboratory of NOAA. He was very active in CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions) sponsored by the National Science Foundation (NSF) as a chemist in the middle atmosphere and troposphere. He died of pancreatic cancer on May 6, 2011. The tribute from his department is listed at

He continued to be active scientifically up until his death, and we will miss him and his courtesy to all.

(2) CEDAR-GEM hotel blocks until May 26, May 27 and June 4.

From Barbara Emery (emery at

Hotel reservations for the $139 block for the CEDAR-GEM Summer Workshop in Santa Fe Sunday June 26 (Student-only Student Workshop) to Friday July 1 are up soon. CEDAR and GEM share bedrooms in the 3 hotels around the Santa Fe Convention Center. Breakfast will be at the Pavilion at the Eldorado Hotel each day, with a few workshops at that hotel also. Most of the plenary and individual workshops are at the Convention Center a 5-minute walk away. The hotel bedroom block ends at the Eldorado Hotel on 26 May, at the Hilton Hotel on 27 May, and at the La Fonda Hotel on 4 June, but hotel registration by 26 May is strongly encouraged, especially for the GEM community where the end block date is 26 May for all 3 hotels. The joint banquet is Monday night June 27. Non-student registrations are due Friday June 3, and CEDAR students should make their airline reservations by June 3. Student accommodations are taken care of by the separate CEDAR and GEM organizers.

CEDAR participants should register at and get accommodations at or at and use 'CEDAR Summer Workshop' to book their rooms. GEM participants should go to to register and book hotel rooms under 'GEM Summer Workshop' at

Some dates are already filled.

(3) CEDAR-GEM Modeling Challenge Workshop Announcement - model outputs due June 10. Tentative Agenda. Call for Ideas/Viewpont Presentations.

From and

Conveners: Masha Kuznetsova, Ja Soon Shim, Barbara Emery, Aaron Ridley, Delores Knipp, Naomi Maruyama, Tim Fuller-Rowell, Tim Guild, Jan Sojka, Geoff Crowley

Modelers, data providers and users of space weather models are invited to participate in the CEDAR-GEM Modeling Challenge Workshop (Tuesday, June 28 1:30 pm - 3:30 pm, and Thursday, June 30 10 am - 3:30 pm) during the 2011 Joint CEDAR-GEM Workshop in Santa Fe. Details of the Challenge and instructions on how to prepare and submit model output time series and can be found at CCMC, GEM and CEDAR Web sites: and

The CEDAR-GEM Challenge is built upon GEM GGCM and CEDAR ETI Challenges. During the Workshop, GEM and CEDAR communities will share the experiences and lessons learned from the first rounds of the Challenges, address topics of common interest and analyze the effects of geospace model coupling on metrics results.

Participate in the Challenge by submitting your model results by June 10th, 2011.

Both CEDAR and GEM communities have recognized that due to the maturity and increasing complexity of state-of-the-art space weather models, there is a great need for a systematic and quantitative evaluation of different modeling approaches. During the last two years both GEM and CEDAR communities addressed this need by organizing and implementing comprehensive, community-wide efforts to test model predictions against observations. In the summer of 2008 the GEM GGCM Metrics and Validation Focus Group initiated a series of metrics studies (aka GGCM Modeling Challenge) focusing on the inner magnetospheric dynamics and ground magnetic field perturbations. A year later the CEDAR community initiated the IT modeling challenge called CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge. The goal of the two Challenges is to evaluate the current state of the space physics modeling capability, to facilitate interaction between research and operation communities in developing metrics for space weather models, to address the differences between various modeling approaches, to track model improvements over time, to facilitate collaboration among modelers, data providers and research communities, and provide feedback for further model improvement. The Community Coordinating Modeling Center (CCMC) is supporting both Challenges and maintaining a web site with interactive access to model output archive and observational data used for metrics studies. In anticipation of the joint GEM-CEDAR Workshop five time intervals were included in lists of events addressed by both GEM and CEDAR Modeling Challenges:

  • December 14, 2006 12:00 UT - December 16, 00:00 UT
  • August 31, 2001 00:00 UT - September 1, 00:00 UT
  • August 31, 2005 10:00 UT - September 1, 12:00 UT
  • May 15, 2005 00:00 UT - May 15, 2005, 20:00 UT
  • July 9, 2005 00:00 UT - July 12, 2005, 00:00 UT

Through collaboration between CEDAR and GEM Communities, by analyzing simulation results for ionosphere/thermosphere and magnetosphere models for the same set of events, we can analyze the effects of the geospace environment on the ionosphere. Many of the magnetospheric models are coupled to ionosphere-thermosphere models, so that the metrics can be conducted for both coupled and uncoupled simulations on both models.

Modelers are invited to submit simulation results for the 5 events listed above before June 10th 2011 through the interactive submission interface Model output file formats for each physical parameter and measurement availability table with satellite trajectories and ground stations locations can be found at,,

Submissions of coupled magnetosphere-ionosphere models are especially encouraged. To study the effect of different drivers, ionosphere/thermosphere modelers are requested to perform a series of simulations for each event with different models for the ionosphere potential pattern: 1) Weimer 2005 using 15-min averages of the IMF input parameters lagged -5 to -20 min provided by the NCAR and the CCMC; 2) AMIE provided by ASTRA (Geoff Crowley); 3) Global magnetosphere models provided by the CCMC. Please contact Barbara Emery or Masha Kuznetsova if you need assistance to get ionospheric potentials from AMIE and/or global magnetosphere models. List of physical parameters to be used for metrics studies:

Ionosphere/Thermosphere models or coupled model components:

  • Vertical and horizontal drifts at Jicamarca (VperpN and VperpE)
  • Neutral density at CHAMP orbit (Nden)
  • Electron density at CHAMP orbit (Eden)
  • NmF2 from LEO satellites (CHAMP and COSMIC) and ISRs
  • HmF2 from LEO satellites (CHAMP and COSMIC) and ISRs
  • Temperature Tn and neutral winds obtained by Fabry-Perot Spectrometer at 250 km (Arrival Heights, Antarctica; Resolute Bay, Canada)
  • Ne, Te, Ti at 300 km (Millstone Hill, Sondrestrom, EISCAT, Svalbard ISRs).
  • Ion vertical velocity at Sondrestrom ISR

Geospace models or coupled model components:

  • Magnetic field at geosynchronous orbit
  • Ground magnetic perturbations
  • Dst index
  • Auroral oval position (high latitude boundary)
  • Auroral oval position (low latitude boundary)

Parameters along DMSP tracks:

  • Poynting flux (Joule heating) into ionosphere along DMSP tracks
  • Plasma Velocity (Vx - along track, Vy cross track, Vz - vertical)

Additional time series in support of simulation results analysis:

  • Cross polar cap potential (northern and southern hemisphere)
  • Joule heating (or Poynting flux) integrated over each hemisphere in GW.

Tentative agenda, suggested topics for discussions, and call for ideas/viewpoint presentations and participation in discussions:

  1. Review of the first round of GEM and CEDAR Challenges results. Simulations results, observational data and reports on metrics studies for the first round of Challenges are available at the CCMC website. Comments and discussions are welcomed. Results of the first round of Challenges will be used as a benchmark for further studies.
    1. Introduction (M. Kuznetsova)
    2. Overview of the CETI Challenge results (J-S. Shim)
    3. GEM Dst Challange results (L. Rastaetter, D. Welling)
    4. Discussion
  2. Effects of IT/geospace models coupling on metrics results.
    1. Comparison of different approaches to introducing geomagnetic activity effects into ionosphere models (A. Ridley, N. Maruyama)
    2. Poynting flux into the ionosphere (D. Knipp, L. Rastaetter)
    3. Role of ion outflows from the ionosphere to the magnetosphere.
    4. Discussion
  3. Challenges of the model-data comparison and how to address them
    1. How to define the equatorward boundary of the auroral oval from simulations (Y. Zheng)
    2. What metrics to apply and how to calculate skill score for global (e.g., 2D time dependent) observational data. TEC metrics studies planning (B. Emery, L. Goncharenko, A. Coster)
    3. Methods of data preparation.
    4. Uncertainty analysis of model outputs (R. Schunk).
    5. Metrics selection for geospace model evaluation. Lessons learned. Threshold-based metrics (A. Pulkkinen)
    6. Discussion
  4. Climatology projects for the thermosphere, ionosphere, ring current, radiation belts, and the plasma sheet (B. Emery, T. Guild)) – scheduled for Tuesday June 28, 130-330 PM.
  5. General discussion on GEM-CEDAR Modeling Challenges. Planning of future activities

Please contact conveners if you would like to present your viewpoint (no more than 3 slides) on topics listed above, and/or would like to suggest additional topics for discussion.