globalchange  > 科学计划与规划
DOI: 10.1002/2016GL070469
论文题名:
Geoelectric hazard maps for the continental United States
作者: Love J.J.; Pulkkinen A.; Bedrosian P.A.; Jonas S.; Kelbert A.; Rigler E.J.; Finn C.A.; Balch C.C.; Rutledge R.; Waggel R.M.; Sabata A.T.; Kozyra J.U.; Black C.E.
刊名: Geophysical Research Letters
ISSN: 0094-8598
EISSN: 1944-8329
出版年: 2016
卷: 43, 期:18
起始页码: 9415
结束页码: 9424
语种: 英语
英文关键词: geoelectric fields ; geomagnetically induced currents ; induction hazards ; solid-earth impedance ; space weather
Scopus关键词: Earth (planet) ; Geomagnetism ; Maps ; Geoelectric ; Geographic difference ; Geomagnetic activities ; Geomagnetic variation ; Geomagnetically induced currents ; Magnetotelluric surveys ; Solid earth ; Space weather ; Hazards
英文摘要: In support of a multiagency project for assessing induction hazards, we present maps of extreme-value geoelectric amplitudes over about half of the continental United States. These maps are constructed using a parameterization of induction: estimates of Earth surface impedance, obtained at discrete geographic sites from magnetotelluric survey data, are convolved with latitude-dependent statistical maps of extreme-value geomagnetic activity, obtained from decades of magnetic observatory data. Geoelectric amplitudes are estimated for geomagnetic waveforms having 240 s sinusoidal period and amplitudes over 10 min that exceed a once-per-century threshold. As a result of the combination of geographic differences in geomagnetic activity and Earth surface impedance, once-per-century geoelectric amplitudes span more than 2 orders of magnitude and are an intricate function of location. For north-south induction, once-per-century geoelectric amplitudes across large parts of the United States have a median value of 0.26 V/km; for east-west geomagnetic variation the median value is 0.23 V/km. At some locations, once-per-century geoelectric amplitudes exceed 3 V/km. ©2016. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988384769&doi=10.1002%2f2016GL070469&partnerID=40&md5=ca73a3d2f59f94577c80ca37bad26075
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9561
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Geomagnetism Program, U.S. Geological Survey, Denver, CO, United States

Recommended Citation:
Love J.J.,Pulkkinen A.,Bedrosian P.A.,et al. Geoelectric hazard maps for the continental United States[J]. Geophysical Research Letters,2016-01-01,43(18).
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