DOI: 10.1002/2013GL059187
论文题名: In situ observations of Pc1 pearl pulsations by the Van Allen Probes
作者: Paulson K.W. ; Smith C.W. ; Lessard M.R. ; Engebretson M.J. ; Torbert R.B. ; Kletzing C.A.
刊名: Geophysical Research Letters
ISSN: 0094-10247
EISSN: 1944-9978
出版年: 2014
卷: 41, 期: 6 起始页码: 1823
结束页码: 1829
语种: 英语
英文关键词: EMIC
; Pc1
; pearl
; VA Probes
Scopus关键词: Magnetosphere
; Probes
; Cross-over frequencies
; EMIC
; In-situ observations
; Ion cyclotron waves
; Local magnetic field
; Orbiting satellites
; Pc1
; pearl
; Gems
; data set
; in situ measurement
; magnetic field
; magnetometer
; magnetosphere
; polarization
; probe
; satellite imagery
; wave modeling
英文摘要: We present in situ observations of Pc1 pearl pulsations using the Van Allen Probes. These waves are often observed using ground-based magnetometers, but are rarely observed by orbiting satellites. With the Van Allen Probes, we have seen at least 14 different pearl pulsation events during the first year of operations. These new in situ measurements allow us to identify the wave classification based on local magnetic field conditions. Additionally, by using two spacecraft, we are able to observe temporal changes in the region of observation. The waves appear to be generated at an overall central frequency, as often observed on the ground, and change polarization from left- to right-handedness as they propagate into a region where they are resonant with the crossover frequency (where R- and L-mode waves have the same phase velocity). By combining both in situ and ground-based data, we have found that the region satisfying electromagnetic ion cyclotron wave generation conditions is azimuthally large while radially narrow. The observation of a similar modulation period on the ground as in the magnetosphere contradicts the bouncing wave packet mechanism of generation. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898835880&doi=10.1002%2f2013GL059187&partnerID=40&md5=e6ad68462600d6232662549dd0689926
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7511
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Space Science Center, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Paulson K.W.,Smith C.W.,Lessard M.R.,et al. In situ observations of Pc1 pearl pulsations by the Van Allen Probes[J]. Geophysical Research Letters,2014-01-01,41(6).