气候变化领域集成服务门户(CCPortal): First Detection of Kilometer-Scale Density Irregularities in the Martian Ionosphere

CCPortal

DOI	10.1029/2020GL090906
	First Detection of Kilometer-Scale Density Irregularities in the Martian Ionosphere
	Fowler C.M.; Bonnell J.W.; Xu S.; Benna M.; Elrod M.; McFadden J.; Mitchell D.L.; Espley J.; Andersson L.; Ergun R.E.; Lillis R.; Jakosky B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	Plasma instabilities have been studied for many decades in the terrestrial ionosphere via remote and in-situ measurement techniques. The study of these kilometer-scale instabilities has provided crucial insight into coupling between the neutral atmosphere and ionosphere. A special high-time cadence observation mode developed for the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission has demonstrated for the first time that kilometer-scale density fluctuations exist at Mars. Density and associated magnetic fluctuations are observed to occur both in and out of phase with each other, suggesting that multiple instability mechanisms are active, similar to Earth. The unique solar wind interaction with Mars and its localized crustal magnetic fields appears to play an important role in the formation of these irregularity events, which form preferentially during meridionally pointing magnetic field within the ionosphere. This is in contrast to Earth where the strong dipole magnetic field dominates in the terrestrial ionosphere. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electromagnetic fields; Ionospheric measurement; Magnetic fields; Plasma diagnostics; Crustal magnetic fields; Density fluctuation; Density irregularities; Dipole magnetic fields; In-situ measurement; Instability mechanisms; Magnetic fluctuation; Solar wind interactions; Ionosphere; detection method; ionosphere; magnetic field; Mars; meridional circulation; plasma; solar wind
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/169435
作者单位	Space Sciences Laboratory, University of California, Berkeley, CA, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Laboratory of Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Fowler C.M.,Bonnell J.W.,Xu S.,et al. First Detection of Kilometer-Scale Density Irregularities in the Martian Ionosphere[J],2020,47(22).
APA	Fowler C.M..,Bonnell J.W..,Xu S..,Benna M..,Elrod M..,...&Jakosky B..(2020).First Detection of Kilometer-Scale Density Irregularities in the Martian Ionosphere.Geophysical Research Letters,47(22).
MLA	Fowler C.M.,et al."First Detection of Kilometer-Scale Density Irregularities in the Martian Ionosphere".Geophysical Research Letters 47.22(2020).