edu.ucar.opensky::articles:7590 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T15:50:59.254989 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7q81dfk Effect of anomalous electron heating on the transpolar potential in the LFM global MHD model 2005-11-16T00:00:00Z publication https://n2t.org/ark:/85065/d7q81dfk https://doi.org/10.1029/2005GL023315 Merkin, V. author Milikh, G. author Papadopoulos, K. author Lyon, J. author Dimant, Y. author Sharma, A. author Goodrich, C. author Wiltberger, Michael author UCAR/NCAR - Library publisher The tendency of global MHD models to overestimate the transpolar potential in simulations of strong geomagnetic storms and evidence of an adverse feedback of the ionospheric conductance on the potential suggest that these models lack important physics leading to the conductance enhancement. Farley-Buneman instability in the auroral ionosphere provides this lacking physics. This instability is believed to cause strong anomalous electron heating which affects the ionospheric conductivity. We use an earlier developed model of anomalous electron heating to estimate the ionospheric conductance disturbance as a function of the local electric field. This result is used to modify the ionospheric conductance in the LFM model to study its effect on the simulated transpolar potential. An idealized and a real-case simulations are accomplished. In both cases a considerable drop in the simulated transpolar potential is found. The latter is in a good agreement with AMIE model and DMSP data. 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 2005 American Geophysical Union. None eng geoscientificInformation