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Geospace Environment Modeling (GEM)

Geospace Environment Modeling (GEM) is a broad-based, community-initiated research program on the physics of the Earth's magnetosphere and the coupling of the magnetosphere to the atmosphere and to the solar wind. The purpose of the GEM program is to support basic research into the dynamical and structural properties of geospace, leading to the construction of a global Geospace General Circulation Model (GGCM) with predictive capability. This GGCM model will be modularized and will complement parallel developments of magnetohydrodynamic models. The strategy for achieving GEM goals is to undertake a series of campaigns and focus groups, in both theory and observational modes, each focusing on particular aspects of the geospace environment.

The Geospace Environment Modeling (GEM) program is sponsored by National Science Foundation (NSF) Division of Atmospheric and Geospace Sciences.

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What's New

  • The 2019 GEM Summer Workshop will be held during June 22-28, 2019 at the La Fonda Hotel in Santa Fe, NM. Please go to the new conference website for more information.
  • The GEM Steering Committee has selected two new Focus Groups for the 2019-2023 period: (i) “System understanding of radiation belt particle dynamics through multi-spacecraft and ground-based observations and modeling” led by Hong Zhao, Lauren Blum, Sasha Ukhorskiy, and Xiangrong Fu, and (ii) “Particle heating and thermalization in collisionless shocks in the MMS era”, led by Lynn Wilson III, Li-Jen Chen, Katherine Goodrich, and Ivan Vasko.
  • GEM held the 2018 Mini-workshop on Sunday, December 8 at the Hilton Old Town Alexandria in Alexandria, Virginia. After the Focus Group sessions, a plenary session was convened in Salon A&D at 5:10 pm, starting with a 15-minute plenary talk by Lisa Winter about NSF’s Big Ideas, followed by Focus Group proposal presentations. Visit the GEM Mini 2018 website for the full meeting schedule.

GEM Best Practice

The GEM Best Practice document is provided as an informal guide for existing, new, and future members of the GEM Steering Committee. It also includes advice from previous Focus Group leaders on how to propose and run a Focus Group.

Anti-Harassment Policy for GEM Meetings and Activities

GEM is committed to ensuring that all participants in all GEM activities have an environment that is free from harassment. This policy applies to all attendees at GEM activities including scientists, students, guests, staff, and contractors participating in scientific sessions, auxiliary meetings, and social events associated with any GEM gathering or other activity. See the GEM Anti-Harassment Policy for details.

Acknowledgment and Disclaimer

This GemWiki site is based upon work supported by the National Science Foundation under Grant AGS-1405565. Any opinions, findings and conclusions or recommendations expressed at this website are those of the authors and do not necessarily reflect the views of the National Science Foundation (NSF). Comments about this website can be e-mailed to the GEM Communications Coordinator at gemeditor [at]

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