1000-year sunspot series

Solar activity, dominated by the 11-year cyclic evolution, has been observed directly since 1610 CE. Before that, indirect cosmogenic proxy data are used to reconstruct it over...以11年周期演化为核心特征的太阳活动，自公元1610年起便已被直接观测记录。在此之前，学界则借助间接宇宙成因代用资料（cosmogenic proxy data）对其开展重建研究……