Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025944 |
Statistical analysis of spatial and temporal variations in atmospheric electric fields from a regional array of field mills | |
Lucas, G. M.; Thayer, J. P.; Deierling, W. | |
2017-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Electric fields and currents of the global electric circuit have been measured at different locations and time periods around the globe, but a long-term analysis from a regional array of electric field mills has never been performed. Kennedy Space Center (KSC) in Florida has an array of over 30 electric field mills that have been continuously operating and archiving data for over 18 years. KSC is also instrumented with many meteorological towers. With this initial statistical analysis of a long-term data set four unique observations are reported that encompass global as well as local effects. To quantitatively describe the effects, a model to determine near-surface electric fields, incorporating space charge, and conductivity perturbations is developed. Statistical autonomous grouping of the mills using the spatial array demonstrates a greater than 50 V/m spatial variation from coastal to inland mills caused by wind-advected space charge generated near the coast. A temporal analysis identified a strong, globally generated, diurnal signature, but only a weak annual signal is found. A realistic limit on conductivity reductions within clouds is estimated by analyzing overhead cloud cover in relation to near-surface electric field strengths. The estimated in-cloud conductivity reduction of approximately 1/3 is similar to observations but appreciably less than values estimated from microphysical cloud estimates. Finally, an enhancement in the electric field at sunrise is statistically well correlated with low wind speeds and high relative humidities. This paper provides a statistical description of local environmental effects on near-surface electric fields by which to base future studies. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396116900035 |
WOS关键词 | DIURNAL-VARIATIONS ; GROUND-LEVEL ; CIRCUIT ; CHARGE ; THUNDERSTORMS ; COEFFICIENTS ; CLOUDS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32369 |
专题 | 气候变化 |
作者单位 | Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Lucas, G. M.,Thayer, J. P.,Deierling, W.. Statistical analysis of spatial and temporal variations in atmospheric electric fields from a regional array of field mills[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(2). |
APA | Lucas, G. M.,Thayer, J. P.,&Deierling, W..(2017).Statistical analysis of spatial and temporal variations in atmospheric electric fields from a regional array of field mills.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(2). |
MLA | Lucas, G. M.,et al."Statistical analysis of spatial and temporal variations in atmospheric electric fields from a regional array of field mills".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.2(2017). |
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