气象科学2013，Vol.33Issue(1)：66-70,5.DOI:10.3969/2012jms.0060
大气电场的FFT频谱分析及雷暴预报研究
FFT analysis on atmospheric electric field and the applications in thunderstorm prediction
摘要
Abstract
According to the atmospheric electric intensity data of the first happen CG flash (shortened as " thunderstorms" ) and the first unhappen CG flash (shortened as " un-thunderstorms" ) , the FFT ( Fast Fourier Transform) method has been adopted to converse time data to frequency domain, which is used to analyze the amplitude spectrum of the data. The results show that there is an obvious spectrum amplitude distribution difference between the two sets of data, one of which belongs to 30 minutes before the first flash in thunderstorms and the other is related to arbitrary 30 minutes in un-thunderstorms. Furthermore , the two kinds of weather spectrum amplitude distribution may have followed some certain rules. Therefore, on the basis of sample classification, this paper regards two types of averaged weather spectrum amplitude as classification index; uses Euclidean distance method on 63 unknown weather samples to classify the data and examine the results, which shows that this new method can be considered as a reference for the approaching and short-term forecast of the first CG flash.关键词
幅度谱分析/大气电场/欧氏距离判别法/雷暴预报Key words
Amplitude spectrum analysis/Atmospheric electric field/Euclidean distance discriminant method/Thunderstorm forecast分类
天文与地球科学引用本文复制引用
李颖,王振会,肖稳安,曾庆锋,杨天琦..大气电场的FFT频谱分析及雷暴预报研究[J].气象科学,2013,33(1):66-70,5.基金项目
公益性行业(气象)科研专项(GYHY200806014) （气象）
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
