edu.ucar.opensky::articles:23299 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:12:28.332760 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7cf9t9d https://doi.org/10.5065/D67H1H0V https Related Software #1 Community Earth System Model - CESM2.0 Day-to-day variability of prereversal enhancement in the vertical ion drift in response to large-scale forcing from the lower atmosphere 2020-04-01T00:00:00Z publication https://n2t.org/ark:/85065/d7cf9t9d https://doi.org/10.1029/2019SW002334 Liu, Hanli author UCAR/NCAR - Library publisher Equatorial plasma bubbles (EPBs) are plasma density irregularities found in the equatorial ionosphere after sunset and are closely related to the upward ExB drift before it reverses to the generally downward direction at nighttime, referred to as prereversal enhancement (PRE). Although the seasonal variation of PRE and EPB have been generally associated with F and E region dynamo, large variability of EPB occurrence from one day to the next is still puzzling and poses a challenge for equatorial space weather research and forecast. This study shows that the PRE variability is strongly affected by the large-scale lower atmosphere variability on day-to-day weather scales through the E region dynamo at middle latitudes in the summer hemisphere. The whole atmosphere general circulation model with interactive ionosphere electrodynamics employed in the study does not resolve EPB due to insufficient model resolution, but EPB occurrence rate can be deduced from the simulated PRE using an empirical relation. The deduced EPB rate is in good agreement with the observed rates, suggesting the important role of large-scale dynamics and electrodynamics in preconditioning EPB and the feasibility of probabilistic forecast of EPB using a whole atmosphere model. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation