edu.ucar.opensky::articles:42367 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:05:53.608559 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d7qv3rt8 https://doi.org/10.57760/sciencedb.space.01287 https Related Dataset #1 Data based on the study of "What controls the dawn-dusk asymmetry of dayside Alfvénic power: Interplanetary magnetic field or ionospheric conductance?" What controls the dawn‐dusk asymmetry of dayside Alfvénic power: Interplanetary Magnetic Field or ionospheric conductance? 2024-10-01T00:00:00Z publication https://n2t.net/ark:/85065/d7qv3rt8 https://doi.org/10.1029/2024GL112011 Fu, S. author Zhang, B. author Lei, J. author Lotko, William author Yang, Z. author Dang, T. author Luan, X. author UCAR/NCAR - Library publisher Alfv&#233;n waves are important carriers of solar wind energy into the Earth's magnetosphere and upper atmosphere. The observed distribution of Alfv&#233;nic power at low altitude exhibits significant dawn&#8208;dusk asymmetry with different causes and impacts on the dayside and nighside. The nightside asymmetry has been shown to be controlled by the meridional gradient in the ionospheric Hall conductance. It is not clear what controls the dayside asymmetry. Both the ionospheric conductance gradient and orientation of the y&#8208;component of the interplanetary magnetic field (IMF) are possible factors. We examined both possibilities using global magnetohydrodynamic (MHD) simulations. Our results show: (a) The dayside distribution of Alfv&#233;nic power is very sensitive to the orientation of IMF B y , with enhanced power in the dawn (dusk) sector of the northern hemisphere for positive (negative) B y (and opposite in the southern hemisphere); and (b) gradients in ionospheric conductance exert a weaker influence on the dayside asymmetry. 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 <span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation