DOI: 10.1002/grl.50271
论文题名: Transition of Pi2 ULF wave polarization structure from the ionosphere to the ground
作者: Ponomarenko P.V. ; Waters C.L.
刊名: Geophysical Research Letters
ISSN: 0094-9136
EISSN: 1944-8867
出版年: 2013
卷: 40, 期: 8 起始页码: 1474
结束页码: 1478
语种: 英语
英文关键词: ground magnetometers
; HF radars
; Pi2 ULF waves
Scopus关键词: Direct observations
; Ground magnetometer
; Ground-based instruments
; HF radars
; Propagation mechanism
; Transition dynamics
; ULF waves
; Ultra low frequencies
; Ionospheric measurement
; Magnetometers
; Radar
; Viscosity measurement
; Ionosphere
; frequency analysis
; ionosphere
; magnetometer
; polarization
; radar
; spatiotemporal analysis
; wave modeling
英文摘要: Trains of ultra low frequency (ULF) waves in the Pi2 range (40-150 s) are regularly detected in near-Earth space. While some Pi2 occur just before substorm onset, others do not show any casual relation to substorm activity so that the Pi2 generation and propagation mechanisms are still unclear. The bulk of information on Pi2 morphology is provided by ground-based magnetometers, subject to distortions due to transition through the highly conducting lower ionosphere. While space-borne magnetometers provide important in situ information, they cannot match the spatio-temporal continuity of ground-based instruments. In this paper, we devise a novel approach using co-located high-frequency ionospheric radars and ground magnetometers for the first direct observation of the Pi2 wave polarization transition between the ionosphere and the ground. Furthermore, application of the Hilbert transform enables us to reconstruct the transition dynamics, which resolves an apparent disagreement between the Pi2 spectra measured by the two instruments. Key Points First observation of Pi2 polarisation transition from ionosphere to the ground. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877945203&doi=10.1002%2fgrl.50271&partnerID=40&md5=75dedcfce6b0a23a44282223ff897441
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6400
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Space and Atmospheric Studies, University of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2, Canada
Recommended Citation:
Ponomarenko P.V.,Waters C.L.. Transition of Pi2 ULF wave polarization structure from the ionosphere to the ground[J]. Geophysical Research Letters,2013-01-01,40(8).