关于太阳极小期扭振的一个注记
A note on the torsional oscillation at solar minimum
摘要：
我们研究了当前扩展的太阳极小期太阳对流上层纬向流型的演变，并与前一个极小期的纬向流型进行了比较。结果表明，2008年期间达到了与之前最小值相匹配的配置，但与新周期相对应的流带向赤道移动的速度比上一个周期中观察到的要慢，导致表观长度逐渐增加2007 - 2008年期间的周期。低纬度快速旋转带的当前位置与上一个周期活动开始时的位置相对应。
英文摘要：
We examine the evolution of the zonal flow pattern in the upper solar convection zone during the current extended solar minimum, and compare it with that during the previous minimum. The results suggest that a configuration matching that at the previous minimum was reached during 2008, but that the flow band corresponding to the new cycle has been moving more slowly towards the equator than was observed in the previous cycle, resulting in a gradual increase in the apparent length of the cycle during the 2007 -- 2008 period. The current position of the lower-latitude fast-rotating belt corresponds to that seen around the onset of activity in the previous cycle.
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