2020 Workshop:Plasma Instabilities in the ionosphere
Plasma Instabilities and Nonlinear Effects in the Auroral and Subauroral Geospace
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Altitudes: IT - Latitudes: global - Other:
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Recognizing a number of recent observational and theoretical works on ionospheric plasma instabilities, plasma waves, and density irregularities, this workshop seeks to revisit and assess our understanding of the role of nonlinear effects and plasma instabilities in ionospheric phenomena. Investigating such fundamental processes in the context of system-level geospace physics---as is the goal of this proposed workshop---is interdisciplinary by nature and is aligned with one of CEDAR’s current Strategic Thrusts: “To promote collaborations in related but distinct disciplines of geosciences.” Furthermore, “discovering and characterizing fundamental processes that occur both within the heliosphere and throughout the universe” was recognized as a key science goal in the 2012 Decadal Survey Report for Solar and Space Physics.
Plasma instabilities and nonlinear effects play an important role in shaping the dynamics of plasma interactions by redistributing the free energy and by generating plasma waves and density irregularities. The goal of this session is to facilitate in-depth discussions on all aspects of observation and theory of nonlinear effects and plasma instabilities, in both auroral and sub-auroral geospace, to share the recent advancements and to identify open questions in the field. Of particular interests, are multi-scale processes that produce important effects in the magnetosphere-ionosphere-thermosphere system such as ion up-flow, plasma density irregularities, and variation of the ionospheric conductivity. Possible topics of discussion will include, but not limited to, streaming instabilities at the auroral F region and E-region Farley‐Buneman and gradient drift instabilities. Observational results from sounding rockets, satellites, incoherent scatter radars and other ground-based instruments, as well as theoretical and numerical works, are all welcome.
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