Do non-dipole geomagnetic field behaviors persistently exist in the subarctic Pacific Ocean over the past 140 ka?

Yi Zhong, Yanguang Liu, Xiaoqiang Yang, Jian Zhang, Jiabo Liu, Aleksandr Bosin, Sergey A. Gorbarenko, Xuefa Shi, Ting Chen, Yu Min Chou, Wei Liu, Haosen Wang, Congcong Gai, Jianxing Liu, Alexander N. Derkachev, Xiaoke Qiang, Qingsong Liu*

*Corresponding author for this work

    Research output: Contribution to journalComment/debatepeer-review

    10 Citations (Scopus)

    Abstract

    Paleomagnetic records from globally distributed locations are essential for fully understanding geomagnetic field variations, particularly non-dipole field fluctuations [1]. Paleomagnetic studies on historical time scales have demonstrated the existence of persistent geomagnetic flux patches, such as the Canadian (North America) and Siberian (East Asia) flux lobes, which may result from an organizing structure imposed on the geomagnetic field by lower mantle heterogeneity [2]. Holocene paleomagnetic secular variations, reconstructed from the Alaskan margin of the Subarctic Pacific Ocean (SPO) [3] and revealed by dynamo modeling [4], further suggest that time-varying flux expulsions on the core-mantle boundary recurrently occur in high-latitude locations (Fig. 1a).
    Original languageEnglish
    Pages (from-to)1505-1507
    Number of pages3
    JournalScience Bulletin
    Volume65
    Issue number18
    DOIs
    Publication statusPublished - 30 Sept 2020

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