1. College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China 2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 3. College of Mathematics and Information, Northwest Normal University, Lanzhou 730070, China
Abstract：In the coastal area of Guangdong, slit-less spectra for first return strokes of lightning between the cloud and ground were obtained. After spectrum analysis and line identification were done by using multi-configuration Dirac-Fock (MCDF) method, parameters like wavelengths, oscillator strengths, transition probabilities, and excitation energies were calculated. According to the relative intensities of lines and transition parameters, temperatures for individual lightning strokes and at different heights of the discharge channel were calculated by using multiple-line method. The result shows that the temperatures in return stroke channel varied from stroke to stroke. In general, the more intensive the lightning discharge, the higher the value of channel temperature. On the other hand, for a certain return stroke channel, the temperatures at different positions show signs of falling away with increasing height along the discharge channel. Compared with that of Qinghai plateau, lightning in Guangdong coastal area is more intensive, and the lines from higher excitation potential of NⅡ in these lightning spectra are easier observed.
Key words：Lightning spectra;Multiple-line method;Channel temperature
欧阳玉花1,袁萍1，2,郄秀书2,王怀斌2,贾向东3,张华明1 . 广东沿海地区闪电通道的温度特性研究[J]. 光谱学与光谱分析, 2006, 26(11): 1988-1992.
OUYANG Yu-hua1,YUAN Ping1, 2, QIE Xiu-shu2,WANG Huai-bin2,JIA Xiang-dong3, ZHANG Hua-ming1 . Temperature Study on Lightning Return Stroke in the Coastal Area of Guangdong. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(11): 1988-1992.
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