Abstract This study summarizes the pattern of directional paleomagnetic secular variation (PSV) in five previously-published Holocene records from East Asia. Each record is high in resolution and well-dated. We have developed equi-spaced (100-year increment) time series for the declinations and inclinations for the five sites and compared their overall directional variability. We see evidence of nine correlatable scalar features in both inclination and declination. These comparisons suggest that, to first order, these five PSV records all estimate the same regional pattern of PSV for East Asia. We specifically focus on the clockwise or counter-clockwise motion of paleomagnetic directions (termed circularity) in these PSV records. We have used two techniques to estimate the directional circularity of each PSV record. We have first calculated the incremental rate and direction of motion (clockwise or counter-clockwise) in 200-year increments for each record over the last 3000–8000 years. We have separately used a more traditional technique of looking for discernable looping (full loops down to 1/2 loops) in individual records. We estimate the loop sizes, durations, and circularity direction. We largely see the same pattern of circularity in both measurement techniques. There are eight intervals of oscillating circularity (clockwise versus counter-clockwise) in all five sites. They generally agree in timing and direction of circularity. We see evidence for 5 discernable loops alternating between clockwise and counter-clockwise in all five records. Both techniques suggest an oscillating, teeter-totter like, behavior to PSV circularity that must be due to the pattern of fluid flow/magnetic flux regeneration in the outer core. This teeter-totter behavior is unbalanced with almost twice the time spent in clockwise motion as in counter-clockwise motion. Less than 10% of the overall time series duration is spent in linear (not circulating) behavior. The loops tend to have a distribution of sizes and durations with smaller loops being shorter in duration (300–600 years) and bigger loops having longer durations (800–1500 years). One particular feature of these circularity patterns bears special note. All five PSV records show short-term (200–400 years) significant acceleration in circularity rate combined with change in circularity direction. We see evidence for three of these short intervals near 200 BCE, 400 CE, and 1300 CE. These features also are intervals of the fastest regular secular variation rates in all the records. These features are broadly analogous to geomagnetic jerks (Courtillot and LeMouel, 1976, 1984) in that they are short intervals (1–2 years) of anomalous acceleration within high-resolution historical (

中文翻译：

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地磁场定向圆度的区域特征：全新世东亚

摘要 本研究总结了五个先前发表的东亚全新世记录中定向古地磁长期变化 (PSV) 的模式。每条记录都具有很高的分辨率和日期。我们已经为五个站点的赤纬和倾角开发了等距（100 年增量）时间序列，并比较了它们的整体方向变化。我们在倾角和偏角中看到了九个相关标量特征的证据。这些比较表明，首先，这五个 PSV 记录都估计东亚的 PSV 区域模式相同。我们特别关注这些 PSV 记录中古地磁方向的顺时针或逆时针运动（称为圆度）。我们使用了两种技术来估计每个 PSV 记录的方向圆度。我们首先计算了过去 3000-8000 年每条记录以 200 年为增量的增量速率和运动方向（顺时针或逆时针）。我们分别使用了一种更传统的技术，在单个记录中寻找可辨别的循环（完整循环到 1/2 循环）。我们估计循环大小、持续时间和循环方向。在这两种测量技术中，我们在很大程度上看到了相同的圆形模式。在所有五个站点中都有八个振荡圆形间隔（顺时针与逆时针）。他们在循环的时间和方向上大体上是一致的。我们在所有五个记录中看到了 5 个可辨别的循环在顺时针和逆时针之间交替的证据。这两种技术都暗示了一种摆动的，像跷跷板一样的，PSV 圆度的行为必须归因于外核中流体流动/磁通量再生的模式。这种摇摆不定的行为是不平衡的，顺时针运动所花费的时间几乎是逆时针运动的两倍。不到 10% 的总时间序列持续时间花在线性（非循环）行为上。循环往往具有大小和持续时间的分布，较小的循环持续时间较短（300-600 年），而较大的循环具有较长的持续时间（800-1500 年）。这些圆形图案的一个特殊特征值得特别注意。所有五个 PSV 记录都显示短期（200-400 年）循环率显着加速，同时循环方向发生变化。我们在公元前 200 年、公元 400 年和公元 1300 年附近看到了其中三个短时间间隔的证据。这些特征也是所有记录中最快的有规律的长期变化率的区间。这些特征大致类似于地磁跳动（Courtillot 和 LeMouel，1976 年，1984 年），因为它们是高分辨率历史（