globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50484
论文题名:
EMIC waves growth and guiding in the presence of cold plasma density irregularities
作者: De Soria-Santacruz M.; Spasojevic M.; Chen L.
刊名: Geophysical Research Letters
ISSN: 0094-9061
EISSN: 1944-8792
出版年: 2013
卷: 40, 期:10
起始页码: 1940
结束页码: 1944
语种: 英语
英文关键词: EMIC waves ; ring current ; wave amplification ; wave/particle interaction
Scopus关键词: Density irregularities ; Function of frequency ; Geomagnetic storm ; Ion cyclotrons ; Radiation belt electrons ; Ring currents ; Typical structures ; Wave amplification ; Geomagnetism ; Plasma density ; Radiation belts ; Amplification ; electromagnetic field ; electron ; frequency analysis ; geomagnetic field ; plasma ; plume ; wavelength
英文摘要: Intense electromagnetic ion cyclotron (EMIC) waves are observed within plasmaspheric plumes during geomagnetic storms and are believed to be a significant driver of loss of both ring current protons and radiation belt electrons. In this study, we use ray tracing together with path-integrated linear growth calculations to analyze the amplification and propagation of EMIC waves within cold plasma density irregularities characteristic of the plasmaspheric plume. All waves are launched at the equator in the range of L = 5 to 7, and wave amplification is analyzed as a function of frequency and initial wave normal angle. These results are compared to a baseline case without irregularities, which show that guiding is possible for irregularity sizes on the order of the EMIC wavelength. Results suggest that typical structures with density levels above and below the average value can result in both areas of increased as well as suppressed wave activity. © 2013 American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879965531&doi=10.1002%2fgrl.50484&partnerID=40&md5=68970d5f767954fc0474eff0437527e3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6325
Appears in Collections:气候减缓与适应

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作者单位: Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States

Recommended Citation:
De Soria-Santacruz M.,Spasojevic M.,Chen L.. EMIC waves growth and guiding in the presence of cold plasma density irregularities[J]. Geophysical Research Letters,2013-01-01,40(10).
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