DOI: 10.1002/2014GL059214
论文题名: Direct evidence of double-slope power spectra in the high-latitude ionospheric plasma
作者: Spicher A. ; Miloch W.J. ; Moen J.I.
刊名: Geophysical Research Letters
ISSN: 0094-10290
EISSN: 1944-10021
出版年: 2014
卷: 41, 期: 5 起始页码: 1406
结束页码: 1412
语种: 英语
英文关键词: double-slope spectrum
; F layer
; plasma irregularities
; polar ionosphere
; sounding rocket
Scopus关键词: F region
; Ionospheric measurement
; Magnetosphere
; Plasma density
; Power spectrum
; Sounding rockets
; Spectrum analysis
; Direct observations
; double-slope spectrum
; Equatorial ionosphere
; High-latitude ionosphere
; Ionospheric plasmas
; Plasma irregularities
; Polar ionospheres
; Spectral characteristics
; Plasmas
; F region
; latitude
; plasma
; spectral analysis
英文摘要: We report direct observations of the double-slope power spectra for plasma irregularities in the F layer of the polar ionosphere. The investigation of cusp irregularities ICI-2 sounding rocket, which was launched into the polar cusp ionosphere, intersected enhanced plasma density regions with decameter-scale irregularities. Density measurements at unprecedented high resolution with multi-Needle Langmuir Probes allowed for a detailed study of the plasma irregularities down to kinetic scales. Spectral analysis reveals double-slope power spectra for regions of enhanced fluctuations associated mainly with density gradients, with the steepening of the spectra occurring close to the oxygen gyrofrequency. These findings are further supported with the first results from the ICI-3 rocket, which flew through regions with strong precipitation and velocity shears. Previously, double-slope spectra have been observed in the equatorial ionosphere. The present work gives a direct evidence that the double-slope power spectra can be common in the high-latitude ionosphere. Key Points Double-slope spectra of plasma irregularities observed in the polar ionosphere The spectrum steepening related to the onset of kinetic plasma phenomena Spectral characteristics of irregularities similar to equatorial ionosphere ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895853897&doi=10.1002%2f2014GL059214&partnerID=40&md5=bb3ff6a6a9b17b189abbbadb8889b7b7
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7554
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Physics, University of Oslo, Oslo, Norway
Recommended Citation:
Spicher A.,Miloch W.J.,Moen J.I.. Direct evidence of double-slope power spectra in the high-latitude ionospheric plasma[J]. Geophysical Research Letters,2014-01-01,41(5).