DOI: 10.1002/2017JA024932
Scopus记录号: 2-s2.0-85041994129
论文题名: Measurement of Individual H+ and O+ Ion Temperatures in the Topside Ionosphere
作者: Hsu C.-T. ; Heelis R.A.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 2 起始页码: 1525
结束页码: 1533
语种: 英语
英文关键词: H+ temperature
; interhemispheric transports
; retarding potential analyzer
; topside ionosphere energy budget
英文摘要: Plasma temperatures in the ionosphere are associated with both the dynamics and spatial distribution of the neutral and charge particles. During the daytime, temperatures are determined by solar energy inputs and energy exchange between charged and neutral particles. Plasma transport parallel to the magnetic field adds another influence on temperatures through adiabatic processes that are most evident during the nighttime. Previous observations suggest that the topside H+ temperature (TH+) should reside between the O+ temperature (TO+) and the electron temperature (Te), and further calculations confirm the preferential heat transfer from the electrons to H+ in the topside. In this work we implement a more sophisticated analysis procedure to extract individual mass-dependent ion temperatures from the retarding potential analyzer measurements on the DMSP F15 satellite. The results show that the daytime TH+ is a few hundred degrees higher than TO+ at all longitudes. The nighttime temperature difference between TH+ and TO+ is indicative of mass-dependent adiabatic heating and cooling processes across the equatorial region. The ion temperatures and measured plasma flows present clear longitudinal variations that are associated with magnetic declination. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114512
Appears in Collections: 气候减缓与适应
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作者单位: William B. Hanson Center for Space Sciences, University of Texas at Dallas, Richardson, TX, United States
Recommended Citation:
Hsu C.-T.,Heelis R.A.. Measurement of Individual H+ and O+ Ion Temperatures in the Topside Ionosphere[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(2)