摘要
本文分析研究了１９８１—１９９４年太阳辐射流量（２８００ＭＨｚ）、太阳黑子相对数、大气角动量和地球自转日长变化序列的５０ｄ振荡．振荡周期的变化范围从４０ｄ至６０ｄ，它们的变化规律极其相似。１９８１年－１９９４年期间发生的３次厄尔尼诺均出现在太阳活动的５０ｄ振荡周期的谷值时期．这说明太阳活动的５０ｄ振荡可能是引起厄尔尼诺事件的一种原因．
The 50-day oscillations of the solar flux of 2800 MHz(SF),sunspot relative number (SN), atmospheric angular momentum (AAM) and variation in the length of day (△LOD) have been studied. The variable regulations of their oscillation periods are very similar and the range of variation of periods is from 40d to 60d. In the period 1981-1994, four E1 Nino events occurred when the periods of 50-day oscillation of solar activity reached minimum values. This result suggests that the solar activity is perhaps an excitation that leads to E1 Nino events.
出处
《天文学报》
CSCD
北大核心
1996年第4期443-448,共6页
Acta Astronomica Sinica
基金
国家自然科学基金
