edu.ucar.opensky::articles:23359 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:11:23.408063 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d76113j4 Comparative statistical study of characteristics of plasma in planar and non-planar ICME sheaths during solar cycles 23 and 24 2020-04-22T00:00:00Z publication https://n2t.org/ark:/85065/d76113j4 https://doi.org/10.1093/mnras/staa783 Shaikh, Z. I. author Raghav, A. N. author Vichare, G. author Bhaskar, Ankush author Mishra, W. author UCAR/NCAR - Library publisher Planar magnetic structures (PMS) are often observed in sheath regions driven by interplanetary coronal mass ejections (ICMEs) and in corotating interaction regions (CIRs). Here, we study plasma properties statistically within planar and non-planar ICME sheath regions using in situ data from the Advanced Composition Explore (ACE) spacecraft. The study includes 420 ICME-driven sheaths from 1998-2017. We found that 146 (similar to 35 per cent) ICME-driven sheaths are planar, whereas 274 (similar to 65 per cent) are non-planar. This study found that the average plasma temperature, density, speed, plasma beta, thermal pressure and magnetic pressure are higher in planar sheaths than in non-planar sheaths. This implies that high compression plays an essential role in the formation of PMS in sheath regions. Interestingly, our analysis reveals explicitly that the strength of the southward/northward magnetic field component is almost double in planar sheath regions compared with non-planar sheath regions. This suggests that planar sheaths are more geoeffective than non-planar sheaths. 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 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. None eng geoscientificInformation