MAGE Model Simulation of the Pre‐Reversal Enhancement and Comparison With ICON and Jicamarca ISR Observations.

Using the latest coupled geospace model Multiscale Atmosphere‐Geospace Environment (MAGE) and observations from Jicamarca Incoherent scatter radar (ISR) and ICON ion velocity meter (IVM) instrument, we examine the pre‐reversal enhancement (PRE) during geomagnetic quiet time period. The MAGE shows comparable PRE to both the Jicamarca ISR and ICON observations. There appears to be a discrepancy between the Jicamarca ISR and ICON IVM with the later showed PRE about two times larger (∼40 m/s). This is the first time that MAGE is used to simulate the PRE. The results show that the MAGE can simulate the PRE well and are mostly consistent with observations. Key Points: The Multiscale Atmosphere‐Geospace Environment is able to simulate the pre‐reversal enhancement (PRE) very wellThe PRE was a persistent feature on different time scales (day, hour, and minute) during this fall equinox time periodJicamarca Incoherent scatter radar observed PRE is about half of size of that by the ICON ion velocity meter [ABSTRACT FROM AUTHOR]