RESEARCH NOTE: A Late Holocene geomagnetic secular variation record from Erhai Lake, southwest China
RESEARCH NOTE: A Late Holocene geomagnetic secular variation record from Erhai Lake, southwest China
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DOI：
10.1046/j.1365-246x.1999.00764.x
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发表时间：
1999-03
影响因子：
2.8
通讯作者：
M. Hyodo;A. Yoshihara;K. Kashiwaya;T. Okimura;T. Masuzawa;Ryotaro Nomura;Shingo Tanaka;Tang Bang Xing-T
中科院分区：
文献类型：
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作者：
M. Hyodo;A. Yoshihara;K. Kashiwaya;T. Okimura;T. Masuzawa;Ryotaro Nomura;Shingo Tanaka;Tang Bang Xing-T
通过对洱海沉积物柱样的磁化测量，获得了6.5 kyr以来地磁场方向的长期变化记录。为了与这一记录进行比较，结合历史记录中的磁场数据和考古地磁测量，研究了中国中东部地区自350 Be以来的长期变化。洱海的长期变化显示出与组合记录一致的特征，除了在西安观察到的最古老的三个10年波动（公元720 - 900年）。中国的衰落和倾斜的许多特征在日本也同样存在。从公元500年到1000年，在洱海、中国中东部和日本，十月是西风，范围在-20度到-5度之间。
A secular variation record of the geomagnetic field direction for the last 6.5 kyr has been obtained from the magnetization of sediment cores from Erhai Lake, southwest China. In order to make a comparison with this record, secular variation in east-central China was investigated by combining available magnetic field data from historical records and archaeomagnetic measurements since about 350 Be. The secular variation in Erhai Lake shows features consistent with the combined record, except for the oldest three observed declination swings in Sian from 720 to 900 AD. Many features of declination and inclination in China also occur in Japan. From 500 to 1000 AD, declination was westerly ranging from about -20 degrees to -5 degrees in Erhai Lake, east-central China, and Japan.