View Full Document

THE MAGNETOSPHERE-IONOSPHERE SYSTEM



View the full content.
View Full Document
View Full Document

5 views

Unformatted text preview:

The Magnetosphere Ionosphere System from the Perspective of Plasma Circulation W Lotko Thayer School of Engineering Dartmouth College Hanover NH 03755 8000 USA Abstract This tutorial review examines the role of O in the dynamics of magnetosphere ionosphere coupling The life cycle of an O plasma element is considered as it circulates from the mid to high latitude ionosphere Energization and diversion of the convecting plasma element into outflows involves Alfv nic turbulence at the low altitude base of the cusp and plasmasheet boundary layer and in downward current pressure cookers Observational evidence indicating that O dominates the plasmasheet and ring current during extreme storm intervals is reviewed The impacts of an O enriched plasma on solar wind magnetosphere ionosphere coupling are considered at both the micro and global scales A synthesis of results from observation theory and simulations shows that the presence of O in the magnetosphere is both a disruptive and a moderating agent in maintaining the balance between dayside and nightside magnetic merging 1 Introduction No pathway to convection could have ever led to greater complexity or richer plasma dynamics of the coupled magnetosphere ionosphere system than the phenomenon of magnetic reconnection For four decades this paradigm has generated theories and controversies for where and when reconnection should occur why the episodic signatures and processes of reconnection in the magnetotail are so different from those at the dayside and how the ionosphere regulates reconnection and convection The scale of reconnection and its impacts on magnetosphericionospheric plasma circulation have also challenged observations at both extremes global and micro This tutorial will examine the interplay between magnetospheric and ionospheric plasma electrodynamics at these physical extremes To be sure observational progress has been steady cf Johnson 1983 Shelley and Collin 1991 Yau and Andr 1997 Hultqvist et al 1999



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view THE MAGNETOSPHERE-IONOSPHERE SYSTEM and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view THE MAGNETOSPHERE-IONOSPHERE SYSTEM and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?