CAJ | 학술논문

上海佘山地磁台位于中纬度地区,拥有逾百年的连续地磁场观测资料,非常有利于研究地磁活动的周期规律.本文利用该台站1908至2007年的100年磁暴记录,通过时序叠加、傅里叶分析和小波分析研究了磁暴的周期规律.结果表明:强磁暴具有显著的11年、22年和季节变化;弱中等磁暴没有明显的11年周期,并且季节变化的幅度较小.奇/偶太阳活动周相比,强磁暴的季节变化存在一定的差异,低年季节变化不明显,高年季节变化显著,并且偶数周的变化相对复杂.
상해사산지자태위우중위도지구,옹유유백년적련속지자장관측자료,비상유리우연구지자활동적주기규률.본문이용해태참1908지2007년적100년자폭기록,통과시서첩가、부리협분석화소파분석연구료자폭적주기규률.결과표명:강자폭구유현저적11년、22년화계절변화;약중등자폭몰유명현적11년주기,병차계절변화적폭도교소.기/우태양활동주상비,강자폭적계절변화존재일정적차이,저년계절변화불명현,고년계절변화현저,병차우수주적변화상대복잡.
The mid-latitude geomagnetometer of Sheshan holds a successive geomagnetic field data set even more than one-hundred years, which is benefit for the period research of the geomagnetic activity. By the methods of Time Series Superposition, Fourier Analysis and Wavelet Analysis, geomagnetic storms during one hundred years in the intervals between 1908 to 2007 of the observatory are analyzed for the period laws of the geomagnetic storm. The results have shown that, a prominent 11-year cycle, 22-year cycle and semiannual variation are clearly seen in the strong geomagnetic storms, but unconspicuous 11-year cycle and little semiannual variation are also known in the moderate and weak storms. Furthermore, the semiannual variation of the strong storm shows differences between the odd and the even solar cycle, with a remarkable semiannual variation in high solar activity years and complicated variations in the even solar cycle years.