CEDAR email: Invitation to participate in CEDAR Workshop on Neutral wind/Plasma dynamics at high latitudes below 350 km
Pfaff, Robert F. (GSFC-6740)
robert.f.pfaff at nasa.gov
Fri Jun 15 15:07:16 MDT 2018
We welcome community participation in the CEDAR Workshop on “Characterizing neutral wind/plasma dynamics at high latitudes below 350 km” which will take place on Wednesday, June 27th from 10 AM - Noon.
—> Please note the change in DAY for this Workshop —> Now on Wednesday morning!
We welcome presentations and are also planning time for discussion. A description of the workshop is below. Please let us know if you would like to give a presentation and/or if you have a topic or question you would like to discuss during the session.
Rob Pfaff (Robert.F.Pfaff at nasa.gov<mailto:Robert.F.Pfaff at nasa.gov>)
Miguel Larsen (mlarsen at clemson.edu<mailto:mlarsen at clemson.edu>)
Mark Conde (mgconde at alaska.edu<mailto:mgconde at alaska.edu>)
Characterizing neutral wind/plasma dynamics at high latitudes below 350 km
A number of recent NASA sounding rocket campaigns have sought to understand the interactions of the motions of neutral gases (i.e., winds) with those of the ionized gas using a variety of space based in situ measurements, vapor trail techniques, and ground-based observations including Fabry-Perot interferometers and radars. In some cases, all of these techniques have been used simultaneously. Some particularly innovative missions have involved the successful deployment of multiple vapor trails distributed in three dimensions on numerous “sub payloads” deployed simultaneously.
These recent measurements provide a new window on the highly dynamic neutral gas and its variations with altitude, often exhibiting large shears and significant flow amplitudes that change markedly with altitude. The data present a fresh perspective on our present understanding of not only the wind variations themselves, but more importantly, what drives these motions and, in particular, how does the ambient environment regulate the evolution and response of the neutral gas motions.
As an example, the Auroral Jets mission included two simultaneous rocket flights with different apogees (190 km and 331 km) over an initially stable auroral arc. By combining ground-based FPI array data, incoherent scatter radar, TMA releases, and in situ measurements, this straightforward experimental geometry provides new insights into neutral wind structures generated by auroral forcing. Results from other rocket campaigns to be reported at this workshop include data gathered from multiple sub-payloads which released either neutral or ionized vapor trails to provide, for the first time, a three dimensional picture of the complex, coupled dynamic gas flows.
Whereas these recent rocket measurements helped to motivate this session, the main focus of the workshop is to incorporate ALL observational and modeling studies that address the highly dynamic and structured nature of ion-neutral coupling at high latitudes. In this regard, the ensemble of theory and data enable definitive tests of a variety of physics-based models and advance our understanding of how the thermosphere responds to auroral ionospheric electrodynamics as well as from forcing from below.
This workshop welcomes discussions of ground-based and rocket-related data as well as other research efforts that seek to explore neutral dynamics in the context of our present understanding of high latitude upper atmosphere/ionosphere physics and models. The goal of this workshop is to both present observational results and also to discuss data analysis and interpretive strategies to understand the data and to interpret future measurements of continuous ground-based measurements, in particular.
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