气候变化领域集成服务门户(CCPortal): Oxygen Ion Escape From Venus Is Modulated by Ultra-Low Frequency Waves

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DOI	10.1029/2020GL087462
	Oxygen Ion Escape From Venus Is Modulated by Ultra-Low Frequency Waves
	Jarvinen R.; Alho M.; Kallio E.; Pulkkinen T.I.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	We study the solar wind-driven, nonthermal escape of O+ ions from Venus in a global hybrid simulation. In the model, a well-developed ion foreshock forms ahead of the Venusian quasi-parallel bow shock under nominal upstream conditions. Large-scale magnetosonic ultra-low frequency (ULF) waves at 20- to 30-s period are excited and convect downstream along the foreshock with the solar wind. We show that the foreshock ULF waves transmit through the bow shock in the downstream region and interact with the planetary ion acceleration, causing 25% peak-to-peak fluctuations in the O+ escape rate. These results demonstrate the importance of upstream plasma waves on the energization and escape of heavy ions from the planetary atmospheres. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Heavy ions; Oxygen; Plasma shock waves; Solar wind; Downstream region; Energization; Hybrid simulation; Ion accelerations; Magnetosonic; Planetary atmosphere; Ultra low frequencies; Upstream conditions; Earthquakes; foreshock; frequency analysis; ion; magnetosphere; oxygen; planetary atmosphere; plasma; solar wind; Venus; wave field; Venusia
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/170302
作者单位	Department of Electronics and Nanoengineering, School of Electrical Engineering, Aalto University, Espoo, Finland; Finnish Meteorological Institute, Helsinki, Finland; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Jarvinen R.,Alho M.,Kallio E.,et al. Oxygen Ion Escape From Venus Is Modulated by Ultra-Low Frequency Waves[J],2020,47(11).
APA	Jarvinen R.,Alho M.,Kallio E.,&Pulkkinen T.I..(2020).Oxygen Ion Escape From Venus Is Modulated by Ultra-Low Frequency Waves.Geophysical Research Letters,47(11).
MLA	Jarvinen R.,et al."Oxygen Ion Escape From Venus Is Modulated by Ultra-Low Frequency Waves".Geophysical Research Letters 47.11(2020).