气候变化领域集成服务门户(CCPortal): High-altitude water ice cloud formation on Mars controlled by interplanetary dust particles

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DOI	10.1038/s41561-019-0379-6
	High-altitude water ice cloud formation on Mars controlled by interplanetary dust particles
	Hartwick V.L.; Toon O.B.; Heavens N.G.
发表日期	2019
ISSN	17520894
卷号	12 期号:7
英文摘要	Submicrometre-size meteoric smoke aggregates form when interplanetary dust particles ablate and re-coagulate in the Martian atmosphere. The MAVEN (Mars Atmosphere and Volatile Evolution) satellite has detected pervasive ionized metallic layers due to meteor ablation at an 80–90 km altitude, which suggests a continuous supply of meteoric smoke particles that settle to lower altitudes. Until now, meteoric smoke has been neglected in general circulation model studies of the formation of Martian water ice clouds. Here we show that when meteoric smoke is included in simulations of the atmospheric circulation on Mars, mesospheric water ice clouds form at low pressures and in discrete layers, polar hood clouds extend to higher altitudes and the seasonal Hadley cell is weakened. Furthermore, we find that the middle atmosphere water ice clouds respond to and influence the diurnal and semidiurnal migrating thermal tides. We conclude that Mars atmospheric simulations that neglect meteoric smoke do not reproduce the observed spatial distribution of water ice clouds and miss crucial radiative impacts on the overall atmospheric dynamics. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	ablation; atmospheric circulation; atmospheric general circulation model; cloud cover; Hadley cell; ice crystal; interplanetary dust; Mars; meteor; satellite altimetry; smoke; spatial distribution
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124643
作者单位	Department of Atmospheric and Oceanic Sciences, Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States; Department of Atmospheric and Planetary Science, Hampton University, Hampton, VA, United States; Space Science Institute, Boulder, CO, United States
推荐引用方式 GB/T 7714	Hartwick V.L.,Toon O.B.,Heavens N.G.. High-altitude water ice cloud formation on Mars controlled by interplanetary dust particles[J],2019,12(7).
APA	Hartwick V.L.,Toon O.B.,&Heavens N.G..(2019).High-altitude water ice cloud formation on Mars controlled by interplanetary dust particles.Nature Geoscience,12(7).
MLA	Hartwick V.L.,et al."High-altitude water ice cloud formation on Mars controlled by interplanetary dust particles".Nature Geoscience 12.7(2019).