Community:Email 28Oct13

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Call for participation in CEDAR-GEM Modeling Challenge Session at 2013 GEM Mini-Workshop

We invite modelers, data providers, science and operational users of space weather models to participate in the GEM-CEDAR Modeling Challenge Session, which will be held during 2013 GEM Mini-Workshop on Sunday, December 8th 2013. The session details will be provided later, however it is suggested that you plan to arrive on Saturday (12/07/2013) since sessions usually start at noon.

Since the initiation of CEDAR-GEM Challenge ( during the Joint CEDAR-GEM Workshop in June 2011, the project focuses on various scientific and operational aspects of the performance of magnetosphere and ionosphere models and addresses challenges of model-data comparisons and metrics studies. The studies done and topics discussed so far include

  • Poynting Flux/Joule Heating metrics study
  • Auroral oval boundary study
  • MI coupling study:
    • Role of drivers on Ionosphere/Thermosphere model results
    • Tools for swapping drivers (e.g., high latitude electric potential, particle precipitation, penetration electric field)
  • Global TEC/NMF2/HMF2 metrics study
  • Ionosphere/Thermosphere climatology study
  • Model-Data comparison:
    • How to quantify storm impacts on the ionosphere and thermosphere
    • Ideas for real-time validation (e.g., IT parameters at ISS location)

In the session this year, we will discuss:

  1. Quantifying storm impacts on the ionosphere/thermosphere
  2. Status of community-wide tool for ionosphere drivers
  3. Model-data comparison for high inclination and polar orbiting satellites (e.g., ISS, DMSP, and etc.)

During the CEDAR-GEM Challenge Meetings at the 2013 Space Weather Workshop (April 15, 2013) and 2013 CEDAR Workshop (June 22-28,2013), there was a discussion on “How to quantify storm impact on the ionosphere and thermosphere”, and 8 physical processes ( for the study were suggested by Tim Fuller-Rowell. We will first focus on three of the eight physical processes.

(1) Quantifying storm impacts on the ionosphere/thermosphere

  • Process 1: Quantifying the storm energy input
    • Increase in magnetospheric/ionospheric high latitude convection and auroral precipitation
    • Enhances in conductivity at high latitudes and NO production
    • High latitude winds accelerated by ion drag
    • Joule heating increase
    • NO cooling IR radiation measured by SABER (∝ NO and T)
    • Rate of temperature/density response and recovery
  • Process 3: Build-up of plasma and structure at mid-latitude
    • Validate TEC from GPS maps
    • Validate in-situ Ne, slant TEC, or limb profile Ne from satellites
    • Validate ground location Ne profiles with ionosondes
  • Process 6: Onset/timing/evolution of neutral composition change
    • Response and recovery of O/N2 (e.g., TIMED/GUVI)
    • Movement of boundaries in O/N2 (e.g., TIMED/GUVI)

People are invited to present on the topics.

Next, we will discuss preliminary results and future plans of community-wide collaborative development of
(2) Driver swapping tool for MI coupling study

We will also discuss
(3) model-data comparisons for high inclination and polar orbiting satellite:

  • ISS Geomagnetic Storm Studies (e.g., ISS Auroral Charging)
  • Preparation for a new model/data comparison project
    • Ne and Te at ISS locations (in 2012 and etc.)

Data will be available soon and we will discuss the priority of various time intervals.

If you are interested in presenting your work, or you have suggestions or comments, please contact one of the people listed below:

Ja Soon Shim (, Barbara Emery (, Masha Kuznetsova (