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DOI10.1029/2019GL086372
Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux
Pal S.; Dash S.; Nandy D.
发表日期2020
ISSN 0094-8276
卷号47期号:8
英文摘要Magnetic clouds (MCs) are flux rope magnetic structures forming a subset of solar coronal mass ejections, which have significant space weather impacts. The geoeffectiveness of MCs depends on their properties, which evolve during their interplanetary passage. Based on an analysis of observations spanning two solar cycles, we establish that MCs interacting with the ambient solar wind magnetic field (i.e., heliospheric open flux) lose a substantial amount of their initial magnetic flux via magnetic reconnection, which, in some cases, reduce their geoeffectiveness. We find a linear correlation between the eroded flux of MCs and solar open flux which is consistent with the scenario that MC erosion is mediated via the local heliospheric magnetic field draping around an MC during its interplanetary propagation. The solar open flux is governed by the sunspot cycle. This work therefore uncovers a hitherto unknown pathway for solar cycle modulation of the properties of MCs. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词Magnetic fields; Solar energy; Coronal mass ejection; Geoeffectiveness; Heliospheric magnetic fields; Interplanetary propagation; Linear correlation; Magnetic clouds; Magnetic reconnections; Solar cycle modulation; Erosion; corona; correlation; interplanetary dust; magnetic field; solar cycle; solar wind; sunspot
语种英语
来源期刊Geophysical Research Letters
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/170447
作者单位Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, Mohanpur, India; Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
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Pal S.,Dash S.,Nandy D.. Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux[J],2020,47(8).
APA Pal S.,Dash S.,&Nandy D..(2020).Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux.Geophysical Research Letters,47(8).
MLA Pal S.,et al."Flux Erosion of Magnetic Clouds by Reconnection With the Sun's Open Flux".Geophysical Research Letters 47.8(2020).
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