Meso-scale coupling from the polar cap to the nightside auroral oval to the subauroral region- Description and IT system impacts
Abstract
Our goal is to advance understanding of connections and impacts in the nightside mid-high latitude ionosphere-thermosphere (1-T) system via strong, mesa-scale flovyrs and precipitation. The specific science objectives (SO) are, (SO 1) Determine two-dimensional structure of mesa-scale flow channels and precipitation and their impact on the 1-T system; (SO2) Determine the flow-channel connection from the polar-cap to auroral oval and its impact on the 1-T system;.(SO3) valuate when the auroral streamers reach mid-latitudes and create ground magnetic field disturbances; and (SO4) Identify the impact of intense SAID on the I-T system. We will examine such flows from the polar cap to the auroral oval, and from the auroral oval to the subauroral region, in order to determine their spatial and temporal structure and to evaluate their effects on the system via global ionosphere-thermosphere model (GITM) simulations of realistic region-connecting structures and comparison with observations, and to evaluate their relationships to mid-latitude rapid magnetic field depressions. or the system-level connections; we will take advantage of the all-sky-imager (ASI) network in North America from the polar cap to the subauroral latitudes and the SuperDARN radars to obtain two-dimensional structure and temporal evolution of flow channels. We will specify flow channels structure and evolution far more accurately than possible in currently existing models. We will use the meso-scale precipitation and convection that are specified by the observations as input to the GITM model, and we will examine impacts of the meso-scale energy input on the ionosphere and thermosphere in the nightside high-latitude ionosphere.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2024
- Source ID
- FA95502310614
Entities
People
- Yukitoshi Nishimura
Organizations
- Air Force Office of Scientific Research
- Boston University
- United States Air Force