2021 Workshop:Multi scale IT system System Dynamics

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Grand Challenge: Multi-scale Ionosphere-Thermosphere System Dynamics

Tentative List of Speakers and Titles

10-12am MDT, Wednesday June 23

  • Aaron Ridley New model development on IT Models (10 min + Q&A)
  • Yue Deng Ion-neutral coupling at different latitudes (10 min + Q&A)
  • Doga Ozturk Small-scale GITM simulations (10 min + Q&A)
  • Tzu-Wei Fang Forecasting Multi-scale Space Weather Phenomena in the Upper Atmosphere (10 min + Q&A)
  • Ryan McGranaghan Looking across scales: Multiscale geospace particle transfer through information representation and machine learning (10 min + Q&A)
  • Erdal Yigit Influence of Latitude-dependent Gravity Wave Sources on the Middle and Upper Atmosphere (6 min + Q&A)

1-3pm MDT, Wednesday June 23

  • Tomoko Matsuo Data assimilation with meso-scale precipitation (10 min + Q&A)
  • Richard Linares Data assimilation and uncertainty quantification of the thermosphere (10 min + Q&A)
  • Bill Bristow Multi-Scale SuperDARN Convection Model Development (10 min + Q&A)
  • Larry Lyons Interplay between meso-scale aurora and flow (10 min + Q&A)
  • Leslie Lamarche Multiscale Scintillation in the Polar Cap (6 min + Q&A)
  • Qingyu Zhu Impact of soft electron precipitation on the thermosphere during two intense geomagnetic storms: GITM simulations (6 min + Q&A)
  • Haonan Wu Multi-Resolution Data Assimilation Model for High-Latitude Electric Fields (5 min + Q&A)

Location, Date/Time and Duration

4 hours


Toshi Nishimura
Aaron Ridley
Naomi Maruyama
Ryan McGranaghan
Yue Deng
Larry Lyons
Ingrid Cnossen
Matt Zettergren
Marilia Samara
Katrina Bossert
Meers Oppenheim
Ying Zou

Workshop Categories

Altitudes: IT - Latitudes: global - Inst/Model: modeling - Other: observations and modeling

Format of the Workshop

Short Presentations

Estimated attendance


Requested Specific Days

Morning hours in Mountain Time

Special technology requests


Community-wide discussions and collaborations among observers and modelers across regions and scales are required to address the challenge of understanding geospace across scales (i.e., multi-scale). At previous CEDAR meetings, multi-scale discussions have taken place in a rather ad hoc, uncoordinated, and disjointed manner. Multi-scale coupling is a Grand Challenge because the technologies for bridging the different scales do not exist in our community, either on the observational or the modeling side. Despite understanding of potential and auroral patterns on global scales, existing models cannot specify meso-scale (a few 10s and a few 100s km) and small-scale (<~10 km) in the context of the large-scale system. On the modeling side, we have large-scale and meso/small-scale models that have never been compared, since the systems have been operated independently. This subject is timely, since both observation and modeling systems are increasingly sophisticated and capable to explore a variety of scales and the CEDAR community needs to develop the tools to bridge this knowledge gap. We propose a workshop-style format that consists of a coherent discussion of activities, identification of science questions and diversified solution methodologies, implementation and evaluation amongst relevant experts who otherwise are not usually deliberately aligned in a single session.


It has been recognized that there are various scales in the thermosphere and ionosphere system, and that a variety of processes interact across these scales, depositing energy and momentum at different levels. Until recently, researchers who study larger- scale processes and researchers who study smaller-scale processes have not interacted much at all, since there was little ability to apply lessons learned on meso/small scales to the large scales and vice-versa. With the advent of more global scale networks of sensors (all sky imagers, GPS receivers, SuperDARN, Iridium, etc.), and large-scale models that can be run at fine resolution (less than 100 km) and local-scale models that can be run over fairly large scales, it has become possible to explore the coupling between scales.

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