期刊
JOURNAL OF ELECTROSTATICS
卷 70, 期 1, 页码 54-59出版社
ELSEVIER
DOI: 10.1016/j.elstat.2011.10.003
关键词
Fractal rough ocean surface; Lightning electromagnetic fields; Frequency spectrum; Effective impedance; Attenuation function
资金
- Commonweal Industry of China [GYHY200806014]
- National Natural Science Foundation of China [40975002]
- Natural Science Fund for Colleges and Universities in Jiangsu Province [09KJB170005]
Based on an improved two-dimension (2D) fractal model of rough ocean surface, the propagation effects of the rough ocean surface on the vertical electric fields generated by lightning return strokes are analyzed. The results show that the rough ocean surface has much effect on the electric field derivatives, but has no or little effect on the field peaks. The frequency above 10 MHz is attenuated significantly by the rough ocean surface, and the rapid attenuation of frequency above 10 MHz in the experimentally obtained spectrum may be taken into account the errors introduced by the roughness of the ocean surface. (C) 2011 Elsevier B.V. All rights reserved.
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