2016 Workshop:Particle Precipitation

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Particle Precipitation and the Effects on Earth's Atmosphere

Location, Date/Time and Duration

4 hours

Conveners (First is primary convener and the rest are co-conveners)

Alexa Halford
Kyle Murphy
Allison Jaynes
Roger Varney
Stephen Kaeppler

Format of the Workshop

Short Presentations

Estimated attendance

40

Workshop Categories

Altitudes: Select One - Latitudes: Select One - Inst/Model: Select One - Other:

Justification for the workshop

Understanding the effects of particle precipitation into the upper atmosphere is of interest to both the GEM and CEDAR communities as well as the wider Heliospheric community making this topic ideal for a joint GEM-CEDAR session. Specifically, understanding the dynamics of the loss of magnetospheric particle populations including radiation belt electrons, plasma sheet ions and electrons and ring current plasma, to the atmopshere is relevant to the following GEM focus groups: Quantitative Assessment of Radiation Belt Modeling, Geospace Systems Science, Tail-inner Magnetosphere Interactions, and to the following CEDAR strategic Thrusts: Encourage and Undertake a Systems Perspective to Geospace, Explore Exchange Processes at Interfaces and Boundaries, and Fuse the Knowledge Base across Disciplines. Understanding the Atmosphere-Ionosphere-Magnetosphere System Response and variability is also highlighted in the Decadal Survey for Solar and Space Physics. Additionally, this topic is emphasized in the new National Space Weather Strategy (http://tinyurl.com/2015nsws) and Action Plan (http://tinyurl.com/2015nswap).

Requested Specific Days

We would prefer to avoid conflict with the following GEM groups: Testing Proposed Links between Mesoscale Auroral and Polar Cap Dynamics and Substorms (Kyle is a co-convener), Quantitative Assessment of Radiation Belt Modeling, Inner Magnetosphere Cross-Energy/Population Interactions, Merged Modeling & Measurement of the Ionospheric Source of Magnetospheric Plasama, and Storm-Time Inner Magnetosphere-Ionosphere Convection. We would also like to avoid conflict with CEDAR sessions focusing on magnetosphere-ionosphere coupling. Steve one of the conveners proposing Crowd to Cloud session and we would prefer to not conflict with this session either.

Special technology requests

A projector and screen would be necessary as well as either a white/chalk board or large post-it notepad with easel and markers.

Description

The precipitation of energetic particles is a major magnetosphere-ionosphere pathway which has implications for atmospheric chemistry. However, quantifying this process and the amount of precipiation to the upper atmosphere remains difficult to because of the requirement of conjugate magnetospheric and ionospheric observations. Increased ionization of the F, E, and D regions of the ionosphere have important implications for driving gravity waves, enhancing ionospheric conductivity, as well as the production and transport of NOx and HOx, which can have important consequences for terrestrial climate. Both the GEM and CEDAR communities, as well as the larger geophysics community, are interested in quantifying and understanding the loss of magnetospheric and solar particles to the upper atmosphere.

There are large gaps in our understanding of processes that span the disciplines of both the GEM and CEDAR groups. In this joint session we hope to bring together researchers from both communities to share expertise. This expertise will develop a better understanding of the underlying physics of particle loss, to show observations of loss into the atmosphere for the purpose of predicting, and describe the occurrence variability, flux, region of loss, and energy spectra of precipitation loss to the upper atmosphere. We seek short and focused presentations on the ionospheric and atmospheric response from magnetospheric particle loss, the importance of the processes generating this loss in the coupled magnetosphere-ionosphere system and outstanding questions regarding energetic particle loss.

Workshop Agenda

Workshop Summary

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