Whitepaper #443 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; basic research. Additional topics: system science; space weather research/applications/operations pipeline; space-based missions/projects; […]
In this paper we lay out the suggested modeling, observations, and scientific questions for the decadal survey to fill the knowledge gap in our understanding of this lower thermosphere circulation and the dynamics in this region as a whole due primarily to lack of observations. We propose here that NASA solicit mission proposals to measure global winds and trace gasses densities at 100-150 km.