Welcome to the Center for the Unified Study

of Interhemispheric Asymmetries

Realizing the inclusion of interhemispheric asymmetries in geospace system modeling
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Modern science doesn't fully understand the nature of interhemispheric asymmetries

Space weather affects our planet differently in the northern and southern hemispheres

Contemporary theory and modeling tools can’t help us understand why... Yet

Reality Vs. Simulation

Comparing what we see to what models can simulate

CUSIA's Capabilities Assessment Matrix (CAM ) compares a range of scientific observations to modeling capabilities of current state-of-the-art global and coupled models (none of which can properly account for Earth's interhemispheric asymmetries). Mapping our current understanding and modeling capabilities of interhemispheric asymmetries, the CAM provides our community the ability to quickly and confidently identify, prioritize, and pivot our efforts to address our most pressing scientific questions.

Explore topics and leave comments to expand the knowledge base of the CAM

Example CAM post

IMF By Component

Intrinsic Source of Asymmetry

Relative Importance of Asymmetry - Primary


Causes: Dipole Tilt, IMF By

Effects: Birkeland Currents, Diffuse Precipitation, Ionospheric Currents, Joule Heating, Magnetotail Structure

Modeling Capability:

All global MHD models can include IMF By in the solar wind time series that drive the code. Many aspects of asymmetry produced by IMF By, such as shear in the Birkeland current patterns and asymmetric potential distributions, are captured to some extent by the global codes. However, inner magnetosphere codes that depend on the polar ionosphere current use only the northern hemisphere solution.

BATS-R-US MHD


IMF By included in input to MHD code

LFM MHD


IMF By included in input to MHD code

OpenGGCM MHD


IMF By included in input to MHD code

GUMICS MH


IMF By included in input to MHD code

CUSIA News

What we're thinking about

Helio2050

Asymmetries in Heliophysics

Addressing Asymmetries in Heliophysics

End to End Modeling with Dan Welling

Modeling Ionospheric Outflow with Alex Glocer

AMPERE and SWMF Observations of Interhemispheric Asymmetries in Birkeland Currents during the 8 October 2012 Magnetic Storm.

Additional Resources

Open access to all of the code, math, and papers we've been writing

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Algorithms

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