Long-term Variation of the Solar Polar Magnetic Fields at Different Latitudes  

作　　者：Shuhong Yang Jie Jiang Zifan Wang Yijun Hou Chunlan Jin Qiao Song Yukun Luo Ting Li Jun Zhang Yuzong Zhang Guiping Zhou Yuanyong Deng Jingxiu Wang 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China [3]State Key Laboratory of Solar Activity and Space Weather,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China [4]School of Space and Environment,Beihang University,Beijing 102206,China [5]Key Laboratory of Space Weather,National Satellite Meteorological Center(National Center for Space Weather),China Meteorological Administration,Beijing 100081,China [6]Innovation Center for FengYun Meteorological Satellite(FYSIC),Beijing 100081,China [7]School of Physics and Materials Science,Anhui University,Hefei 230601,China

出　　处：《Research in Astronomy and Astrophysics》2024年第7期190-197,共8页天文和天体物理学研究（英文版）

基　　金：supported by the National Key R&D Programs of China(2019YFA0405000,2022YFF0503800,2022YFF0503000);the Strategic Priority Research Programs of the Chinese Academy of Sciences(XDB0560000,XDB41000000);the National Natural Science Foundations of China(NSFC,Grant Nos.12173005,12273060,12350004,12273061,12222306,and 12073001);the Youth Innovation Promotion Association CAS,and Yunnan Academician Workstation of Wang Jingxiu(No.202005AF150025)。

摘　　要：The polar magnetic fields of the Sun play an important role in governing solar activity and powering fast solar wind.However,because our view of the Sun is limited in the ecliptic plane,the polar regions remain largely uncharted.Using the high spatial resolution and polarimetric precision vector magnetograms observed by Hinode from 2012 to 2021,we investigate the long-term variation of the magnetic fields in polar caps at different latitudes.The Hinode magnetic measurements show that the polarity reversal processes in the north and south polar caps are non-simultaneous.The variation of the averaged radial magnetic flux density reveals that,in each polar cap,the polarity reversal is completed successively from the 70°latitude to the pole,reflecting a poleward magnetic flux migration therein.These results clarify the polar magnetic polarity reversal process at different latitudes.

关 键 词：dynamo-Sun magnetic fields-Sun photosphere 

分 类 号：P182[天文地球—天文学] P353.8