Planetary wave oscillations in sporadic E layer occurrence at Wuhan
会议名称：《中国科学院地质与地球物理研究所2008学术年会》
会议日期：2009年
学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学]
基 金：supported by the KIP Pilot Project(kzcx2-yw-123)of the Chinese Academy of Sciences National Important Basic Research Project(2006CB806306) National Naural Science Foundation of China(40636032)
关 键 词：Sporadic E layers planetary waves atmospheric tides PW modulation of tides
摘 要：Quasi 6-day oscillations in E occurrence were observed to occur in relation with planetary wave activity at Wuhan,China(30.6°N,114.5°E).Wavelet analysis of E occurrence time series revealed that a strong 5- to 7-day oscillation was present during the period from about day 120 to 137 of *** same quasi 6-day planetary wave oscillation was also found to dominate the spectrum of concurrent wind data measured in the 80- to 100-km region by a meteor radar,in agreement with the E *** is also a great deal of similarity between the 5- to 7-day band-pass filtered waveforms of E occurrence and the wind *** estimating the wave phase changes with altitude,the quasi 6-day PW in the zonal wind was found to be in phase with the sporadic E layer critical frequency,fE,at about 115 km,close to the observed E *** quasi 6-day PW modulation was also present in the amplitude of the 12-h and 24-h periodicities which existed in the fE time *** present results provide new evidence in favor of a planetary wave indirect role on E formation through the modulation of tides,which in line with previous studies by Haldoupis and Pancheva(2002),and Pancheva et al.(2003).