*************************** ** THE GEM MESSENGER ** *************************** Volume 22, Number 31 November 13, 2012 ---------------------------------------------------------------------- Call for participation in CEDAR-GEM Modeling Challenge Session ---------------------------------------------------------------------- From: Ja Soon Shim , Barbara Emery, and Masha Kuznetsova Modelers, data providers, science and operational users of space weather models are invited to participate in the GEM-CEDAR Modeling Challenge Sessions scheduled during the GEM Mini-Workshop to be held on Sunday, December 2nd 2012, 2:30 - 4:30 pm, in the Franciscan Room of the Westin San Francisco Market Street, 50 Third St. San Francisco. Topics for discussions and tentative agenda: * Role of drivers on Ionosphere/Thermosphere model results * Suitable metrics for validation of TEC prediction for different types of applications * TEC Climatology study * Poynting Flux/Joule Heating metrics study * Auroral oval boundaries: - How to calculate equatorward boundary location - Role of different physics incorporated in models (e.g., coupling with ring current, models for ionospheric conductance) on locations of boundaries * Plans for summer workshops The CEDAR-GEM Challenge was initiated during the Summer 2011 Joint CEDAR-GEM Workshop and is built upon GEM GGCM and CEDAR ETI Challenges. 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 (e.g., model output and observational time series preparation for comparison, measurement uncertainty, metrics selection). A list of selected events, lists of physical parameters and available measurements, model output file formats for each metrics study, and submission instructions can be found at the "GEM-CEDAR Metrics Suite" link (http://ccmc.gsfc.nasa.gov/challenges/GEM-CEDAR/suite.php). For "Role of drivers" study, the December 2006 event E.2006.348 (the AGU storm) was selected: E.2006.348: 2006/12/13 00:00 UT – 2006/12/16 00:00 We encourage modelers to perform simulations for the December 2006 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 Aaron Ridley (University of Michigan); 3) Global magnetosphere models provided by the CCMC. CCMC developed tools based on Kameleon converter and interpolator for 2D ionosphere electrodynamics files. Time interpolator has also been developed. The tool allows us to swap ionosphere drivers at any position (geomagnetic latitude and MLT) or on any grid with any time resolution (ftp://hanna.ccmc.gsfc.nasa.gov/pub/GEM-CEDAR/out/high-latitude- drivers: there are CDF files with SWMF ionosphere electrodynamics for 2006 event. Please refer to README file at the link for compilation.) The physical parameters to be used for "Role of drivers" study and observational data are available at http://ccmc.gsfc.nasa.gov/challenges/GEM-CEDAR/measurements.php and http://cedarweb.hao.ucar.edu/wiki/index.php/2012_Workshop:CEDAR_ETI_Modeling_Challenge. Modelers are invited to submit simulation results through the interactive submission interface at CCMC website http://ccmc.gsfc.nasa.gov/challenges/GEM- CEDAR/challenge_registration.php. Details of the required file formats for submitted results can be found at http://ccmc.gsfc.nasa.gov/challenges/GEM-CEDAR/fileformat.php. Modelers are also encouraged to perform their own research on effects of the different drivers on Ionosphere/Thermosphere parameters selected for the study, and share their findings. It is still not too late to join the Poynting Flux/Joule Heating metrics study. To be included in the first paper for this study please submit your results for all events prior to the December mini-workshop. Auroral Boundaries study is still in the discussion/trial phase. View- point presentations (1-5 slides) on how to calculate boundaries locations and science topics related to auroral boundaries are welcome. If you are interested in presenting your work (1-5 slides), and you have questions and/or comments, please contact one of the people listed below: *Ja Soon Shim (jasoon.shim@nasa.gov) *Barbara Emery (emery@ucar.edu) *Masha Kuznetsova (Maria.M.Kuznetsova@nasa.gov) +-------------------------------------------------------------------+ | To subscribe GEM Messengers, send an e-mail to | | | | with the following command in the body of your e-mail message: | | subscribe gem | | To remove yourself from the mailing list, the command is: | | unsubscribe gem | | | | To broadcast a message to the GEM community, please contact | | Peter Chi at | | | | Please use plain text as the format of your submission. | | | | GEM Messenger is also posted online via newsfeed at | | http://heliophysics.blogspot.com and | | http://www.facebook.com/heliophysics | | | | Back issues are available at ftp://igpp.ucla.edu/scratch/gem/ | | | | URL of GEM Home Page: http://aten.igpp.ucla.edu/gemwiki | | Workshop Information: http://www.cpe.vt.edu/gem/index.html | +-------------------------------------------------------------------+