DOI: 10.1002/grl.50751
论文题名: Cassini CAPS-ELS observations of negative ions in Titan's ionosphere: Trends of density with altitude
作者: Wellbrock A. ; Coates A.J. ; Jones G.H. ; Lewis G.R. ; Waite J.H.
刊名: Geophysical Research Letters
ISSN: 0094-8614
EISSN: 1944-8345
出版年: 2013
卷: 40, 期: 17 起始页码: 4481
结束页码: 4485
语种: 英语
英文关键词: aerosol
; atmosphere
; electron attachment
; ionosphere
; negative ions
; Titan
Scopus关键词: Cassini plasma spectrometer
; Chemical process
; Different mass
; Electron attachment
; Electron spectrometer
; Haze formation
; Titan
; Total density
; Aerosols
; Earth atmosphere
; Ionosphere
; Ionospheric measurement
; Spacecraft instruments
; Spectrometers
; Negative ions
; aerosol
; altitude
; electron
; haze
; hydrocarbon
; ionosphere
; Titan
英文摘要: Observations with the Electron Spectrometer sensor of the Cassini Plasma Spectrometer (CAPS-ELS) have revealed the existence of negative ions in Titan's ionosphere. Negative ions are observed during encounters whenever the instrument points in the ram direction at altitudes 950-1400 km. Complex hydrocarbon and nitrile chemical processes are believed to take place which play a role in haze formation. The heaviest ions observed so far have masses up to 13,800 amu/q. Using data from 34 Titan encounters, we show for the first time negative ion density trends of different mass groups, including total densities, with altitude. We determine peak densities and the associated altitudes at which they are observed and the highest altitudes at which individual mass groups are found. Key Points We determine densities of negative ions observed by CAPS-ELS at Titan We investigate negative ion density trends with altitude We compare the altitude trends of different mass groups ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883445582&doi=10.1002%2fgrl.50751&partnerID=40&md5=28fb9078dd92558116798f39e3dcab05
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5878
Appears in Collections: 气候减缓与适应
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作者单位: Mullard Space Science Laboratory, University College London, Holmbury House, Holmbury St. Mary, Dorking, Surrey RH5 6NT, United Kingdom
Recommended Citation:
Wellbrock A.,Coates A.J.,Jones G.H.,et al. Cassini CAPS-ELS observations of negative ions in Titan's ionosphere: Trends of density with altitude[J]. Geophysical Research Letters,2013-01-01,40(17).