CEDAR email: Joint CEDAR-GEM: "Making Sense of High-latitude Geospace Observations: Modeling, Data Fusion and Assimilation"

[Tomoko Matsuo]

We would like to invite the CEDAR/GEM community to participate in the joint workshop 
“Making sense of high-latitude geospace observations: modeling, data fusion and assimilation” 
scheduled from 4pm through 6pm on June 23 (Thursday) in the O'Keefe/Milagro/Kearny Room.
 
Specification of the electrodynamic state of the polar ionosphere is of paramount interest to the CEDAR/GEM community. 
It defines one of the major driving forces of the thermosphere and ionosphere and provides us with a means to probe 
physical processes in the magnetosphere. The recent advent of global monitoring of the high-latitude geospace system 
prompts us to reexamine the limitations of the conventional approach for the modeling of electromagnetic processes adopted 
in our science community. This workshop addresses the challenges associated with obtaining a self-consistent global 
description of field-aligned, Pedersen and Hall currents, ionospheric conductivity, electric fields, and neutral winds from 
high-latitude geospace observations obtained from various ground-based sensors (e.g., ISRs, SuperDARN, magnetometers, 
imagers, and FPIs) as well as space based sensors (e.g., drift meters, magnetometers, particle analyzers, and imagers). 

Specific challenges discussed during the workshop include the following topics.

(1) When contrasting and combining multiple types of electrodynamics observations to obtain a self-consistent description 
of the high-latitude geospace system, it is crucial to estimate and account for uncertainties and biases in different observation 
types and in a model. 

(2) Ionospheric conductivity serves as a critical linkage in coupling between the magnetosphere, ionosphere and thermosphere, 
playing an essential role in the closure of field-aligned currents between the magnetosphere and ionosphere, and in the energy 
and momentum transfer from the magnetosphere to the ionosphere and thermosphere. Nonetheless, direct global monitoring 
of the conductivity is almost non-existent. 

(3) Influences of the neutral wind dynamo are often neglected in the application of Ohm's law to ionosphere-magnetosphere 
coupling, with effects comparable to the uncertainty associated with the conductivity. In the attempt to close the gap in our 
understanding, it is important to examine whether or not the flywheel effect can be seen in electrodynamics observations. 

We will have short presentations (5-10 minutes) followed by open discussion (20-30 minutes).  
Here is a list of confirmed speakers and topics.

Tomoko Matsuo - Introduction 
Mike Ruohoniemi - SuperDARN
Jesper Gjerloev & Shin Ohtani- SuperMAG & AMPERE
Ryan Mcgranaghan - Conductivity mapping 
Russel Cosgrove - Conductivity & AMISR
Rob Gillies - RISE-C along with SWARM, ePOP, REGO, & SuperDARN 
Mark Conde - FPI neutral wind mapping
Art Richmond - AMPERE-driven TIEGCM
Binzheng Zhang - FPI wind and CMIT 
All - Open Discussion 

For more information: http://cedarweb.vsp.ucar.edu/wiki/index.php/2016_Workshop:Making_sense_of_geospace_observations

Please let us know if you have any questions.

Tomoko Matsuo, Tomoko.Matsuo at colorado.edu
Jesper Gjerloev, Jesper.Gjerloev at jhuapl.edu
Ryan Mcgranaghan, Ryan.Mcgranaghan at colorado.edu
Bill Lotko, William.Lotko at dartmouth.edu
Binzheng Zhang, binzheng at ucar.edu