globalchange  > 科学计划与规划
DOI: 10.1002/2015GL063726
论文题名:
An ionized layer in the upper atmosphere of Mars caused by dust impacts from comet Siding Spring
作者: Gurnett D.A.; Morgan D.D.; Persoon A.M.; Granroth L.J.; Kopf A.J.; Plaut J.J.; Green J.L.
刊名: Geophysical Research Letters
ISSN: 0094-8660
EISSN: 1944-8391
出版年: 2015
卷: 42, 期:12
起始页码: 4745
结束页码: 4751
语种: 英语
英文关键词: comet Siding Spring ; comet Siding Spring encounter with Mars ; cometary dust ; meteor impacts with Mars' atmosphere
Scopus关键词: Dust ; Earth atmosphere ; Ionization ; Ionosphere ; Meteor impacts ; Spacecraft ; Comet Siding Spring encounter with Mars ; Cometary dusts ; Low altitudes ; Mars Express spacecraft ; Martian ionosphere ; Radar sounder ; Transient layer ; Upper atmosphere ; comet ; comparative study ; interplanetary dust ; ionization ; Martian atmosphere ; meteor ; radar ; spacecraft ; transition zone ; upper atmosphere
英文摘要: We report the detection of a dense ionized layer in the upper atmosphere of Mars caused by the impact of dust from comet Siding Spring. The observations were made by the ionospheric radar sounder on the Mars Express spacecraft during two low-altitude passes approximately 7 h and 14 h after closest approach of the comet to Mars. During these passes an unusual transient layer of ionization was detected at altitudes of about 80 to 100 km with peak electron densities of (1.5 to 2.5) × 105 cm-3, much higher than normally observed in the Martian ionosphere. From comparisons to previously observed ionization produced by meteors at Earth and Mars, we conclude that the layer was produced by dust from the comet impacting and ionizing the upper atmosphere of Mars. © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945184158&doi=10.1002%2f2015GL063726&partnerID=40&md5=875ec1ac15505c951d0adfc98c70a384
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8276
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States

Recommended Citation:
Gurnett D.A.,Morgan D.D.,Persoon A.M.,et al. An ionized layer in the upper atmosphere of Mars caused by dust impacts from comet Siding Spring[J]. Geophysical Research Letters,2015-01-01,42(12).
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