Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.11.009 |
Electrical sensing of the dynamical structure of the planetary boundary layer | |
Nicoll, K. A.1,2; Harrison, R. G.1; Silva, H. G.3; Salgado, R.4; Melgao, M.4; Bortoli, D.4 | |
2018-04-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 202页码:81-95 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Portugal |
英文摘要 | Turbulent and convective processes within the planetary boundary layer are responsible for the transport of moisture, momentum and particulate matter, but are also important in determining the electrical charge transport of the lower atmosphere. This paper presents the first high resolution vertical charge profiles during fair weather conditions, obtained with instrumented radiosonde balloons over Alqueva, Portugal during the summer of 2014. The short intervals (4 h) between balloon flights enabled the diurnal variation in the vertical profile of charge within the boundary layer to be examined in detail, with much smaller charges (up to 20 pC m(-3)) observed during stable night time periods than during the day. Following sunrise, the evolution of the charge profile was complex, demonstrating charged ultrafine aerosol, lofted upwards by daytime convection. This produced charge up to 92 pC m(-3) up to 500 m above the surface. The diurnal variation in the integrated column of charge above the site tracked closely with the diurnal variation in near surface charge as derived from a nearby electric field sensor, confirming the importance of the link between surface charge generation processes and aloft. The local aerosol vertical profiles were estimated using backscatter measurements from a collocated ceilometer. These were utilised in a simple model to calculate the charge expected due to vertical conduction current flow in the global electric circuit through aerosol layers. The analysis presented here demonstrates that charge can provide detailed information about boundary layer transport, particularly in regard to the ultrafine aerosol structure, that conventional thermodynamic and ceilometer measurements do not. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426226500009 |
WOS关键词 | AEROELECTRIC STRUCTURES ; POTENTIAL GRADIENT ; SPACE-CHARGE ; FIELD ; AEROSOL ; ATMOSPHERE ; CONDUCTIVITY ; COEFFICIENTS ; SIMULATIONS ; CONVECTION |
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/38417 |
专题 | 地球科学 |
作者单位 | 1.Univ Reading, Dept Meteorol, Reading RG6 6BB, Berks, England; 2.Univ Bath, Dept Elect & Elect Engn, Bath BA2 7AY, Avon, England; 3.Univ Evora, Renewable Energies Chair, P-7002554 Evora, Portugal; 4.Univ Evora, Dept Fis, ICT, Rua Romao Ramalho 59, P-7002554 Evora, Portugal |
推荐引用方式 GB/T 7714 | Nicoll, K. A.,Harrison, R. G.,Silva, H. G.,et al. Electrical sensing of the dynamical structure of the planetary boundary layer[J]. ATMOSPHERIC RESEARCH,2018,202:81-95. |
APA | Nicoll, K. A.,Harrison, R. G.,Silva, H. G.,Salgado, R.,Melgao, M.,&Bortoli, D..(2018).Electrical sensing of the dynamical structure of the planetary boundary layer.ATMOSPHERIC RESEARCH,202,81-95. |
MLA | Nicoll, K. A.,et al."Electrical sensing of the dynamical structure of the planetary boundary layer".ATMOSPHERIC RESEARCH 202(2018):81-95. |
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