DOI: 10.1029/2018JA025334
Scopus记录号: 2-s2.0-85047614502
论文题名: The Ionospheric Impact of an ICME-Driven Sheath Region Over Indian and American Sectors in the Absence of a Typical Geomagnetic Storm
作者: Rout D. ; Chakrabarty D. ; Sarkhel S. ; Sekar R. ; Fejer B.G. ; Reeves G.D. ; Kulkarni A.S. ; Aponte N. ; Sulzer M. ; Mathews J.D. ; Kerr R.B. ; Noto J.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 5 起始页码: 4298
结束页码: 4308
语种: 英语
英文关键词: equatorial ionosphere
; geoeffectiveness
; ICME sheath
; prompt penetration
英文摘要: On 13 April 2013, the ACE spacecraft detected arrival of an interplanetary shock at 2250 UT, which is followed by the passage of the sheath region of an interplanetary coronal mass ejection (ICME) for a prolonged (18-hr) period. The polarity of interplanetary magnetic field Bz was northward inside the magnetic cloud region of the ICME. The ring current (SYM-H) index did not go below −7 nT during this event suggesting the absence of a typical geomagnetic storm. The responses of the global ionospheric electric field associated with the passage of the ICME sheath region have been investigated using incoherent scatter radar measurements of Jicamarca and Arecibo (postmidnight sector) along with the variations of equatorial electrojet strength over India (day sector). It is found that westward and eastward prompt penetration (PP) electric fields affected ionosphere over Jicamarca/Arecibo and Indian sectors, respectively, during 0545–0800 UT. The polarities of the PP electric field perturbations over the day/night sectors are consistent with model predictions. In fact, DP2-type electric field perturbations with ∼40-min periodicity are found to affect the ionosphere over both the sectors for about 2.25 hr during the passage of the ICME sheath region. This result shows that SYM-H index may not capture the full geoeffectivenss of the ICME sheath-driven storms and suggests that the PP electric field perturbations should be evaluated for geoeffectiveness of ICME when the polarity of interplanetary magnetic field Bz is northward inside the magnetic cloud region of the ICME. ©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/113994
Appears in Collections: 气候减缓与适应
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作者单位: Physical Research Laboratory, Ahmedabad, India; Indian Institute of Technology Roorkee, Roorkee, India; Utah State University, Logan, UT, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Indian Institute of Geomagnetism, Navi Mumbai, India; Space and Atmospheric Science Arecibo Observatory, Arecibo, Puerto Rico; The Pennsylvania State University, State College, PA, United States; Computational Physics Inc., Springfield, VA, United States
Recommended Citation:
Rout D.,Chakrabarty D.,Sarkhel S.,et al. The Ionospheric Impact of an ICME-Driven Sheath Region Over Indian and American Sectors in the Absence of a Typical Geomagnetic Storm[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(5)