edu.ucar.opensky::articles:27174 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:50:25.260086 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d78056tr https://doi.org/10.5281/zenodo.8116401 https Related Dataset #1 Synthetic data for estimation of the ionospheric induction electric field https://doi.org/10.6084/m9.figshare.1439333 https Related Software #1 xshells code for core flow dynamos Estimating the ionospheric induction electric field using ground magnetometers 2024-04-28T00:00:00Z publication https://n2t.org/ark:/85065/d78056tr https://doi.org/10.1029/2023GL105443 Madelaire, M. author Laundal, K. author Hatch, S. author Vanhamäki, H. author Reistad, J. author Ohma, A. author Merkin, V. author Lin, Dong author UCAR/NCAR - Library publisher The ionospheric convection electric field is often assumed to be a potential field. This assumption is not always valid, especially when the ionosphere changes on short time scales T less than or similar to 5 $T\lesssim 5$ min. We present a technique for estimating the induction electric field using ground magnetometer measurements. The technique is demonstrated on real and simulated data for sudden increases in solar wind dynamic pressure of similar to ${\sim} $1 and 10 nPa, respectively. For the real data, the ionospheric induction electric field is 0.15 +/- $\pm $ 0.015 mV/m, and the corresponding compressional flow is 2.5 +/- $\pm $ 0.3 m/s. For the simulated data, the induction electric field and compressional flow reach 3 mV/m and 50 m/s, respectively. The induction electric field can locally constitute tens of percent of the total electric field. Inclusion of the induction electric field increased the total Joule heating by 2.4%. Locally the Joule heating changed by tens of percent. This corresponds to energy dissipation that is not accounted for in existing models. 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