Signatures of Solar Cycle 25 in Subsurface Zonal Flows
Signatures of Solar Cycle 25 in Subsurface Zonal Flows
复制标题
地下纬向流中太阳活动周期 25 的特征
DOI：
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发表时间：
2018
影响因子：
4.9
通讯作者：
Michael Thompson
中科院分区：
文献类型：
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作者：
R. Howe;F. Hill;R. Komm;W. Chaplin;Y. Elsworth;G. Davies;J. Schou;Michael Thompson
自1995年以来，全球振荡网络集团(GONG)以及太阳和日球层天文台(SOHO)上的迈克尔逊多普勒成像仪(MDI)及其后续设备太阳动力学观测站(SDO)上的太阳地震和磁成像仪(HMI)进行了连续的全球日震观测，监测了与太阳周期有关的纬向流带的模式，给我们提供了近两个完整的太阳周期观测。我们报告说，现在的气流显示出中纬度加速的痕迹，预计中纬度加速将成为第25周期纬向气流模式的主要赤道移动分支。根据该分支目前的情况，我们推测第25周期大范围活动的开始不太可能早于2019年年中。
The pattern of migrating zonal flow bands associated with the solar cycle, known as the torsional oscillation, has been monitored with continuous global helioseismic observations by the Global Oscillations Network Group (GONG), together with those made by the Michelson Doppler Imager (MDI) on board the Solar and Heliospheric Observatory (SOHO) and its successor, the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory (SDO), since 1995, giving us nearly two full solar cycles of observations. We report that the flows now show traces of the mid-latitude acceleration that is expected to become the main equatorward-moving branch of the zonal flow pattern for Cycle 25. Based on the current position of this branch, we speculate that the onset of widespread activity for Cycle 25 is unlikely to be earlier than the middle of 2019.