Dayside and Nightside Coupling in the Dungey Cycle Revealed from Slippage in an Empirical Magnetospheric Model

Matthew Brown (University of Glasgow)

Wednesday 11th March 15:00-16:00
Maths 311B

Abstract

The Dungey Cycle is a large-scale circulation of plasma and magnetic flux in the magnetosphere, propelled by magnetic reconnection. This phenomenon occurs when interplanetary coronal mass ejections (ICMEs) enter the Earth's magnetosphere, compressing it, and subsequently driving the Dungey Cycle through reconnection. In this study, an empirical magnetosphere model is used to investigate a new theory of magnetic reconnection, known as the field line slippage, to determining regions where this occurs the strongest. Different physical frameworks are investigated, one with just purely resistive effects, and another with resistive and hall effects for both day and nightside of the magnetosphere. Comparisons can be made between the day and nightside, along with both frameworks, to find similar reconnection signatures and see how they differ between frameworks, resulting in characterisation of the Dungey Cycle process. This study unveils the large effect a Hall term has on the slippage compared to the resistive term, as well as giving evidence for a complete Dungey Cycle process for certain regions of interest.

 

This is my current title and abstract for my project. I am more than happy to rewrite them or make them shorter to tailor them to a presentation if needed.

Also, out with making the presentation itself, is there anything else I should prepare for this?

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