论文标题
最近，北磁极加速对西伯利亚的加速
Recent north magnetic pole acceleration towards Siberia caused by flux lobe elongation
论文作者
论文摘要
长期以来，地球北磁极垂直向下向下的位置，地球北磁极的徘徊一直是科学迷恋的话题。自1831年在加拿大北极地区进行的第一次原地测量值以来，该杆已经不可阻碍地向西伯利亚漂移，从1990年至2005年之间从其历史速度0-15 km/yr加速到目前的速度为50-60 km/yr。 2017年10月下旬，北磁极越过了国际日期线，经过地理极杆的390公里，现在正向南移动。在这里，我们表明，在过去的二十年中，北磁极的位置在很大程度上取决于加拿大和西伯利亚下的核心棒球界面上的两个大型磁通裂片。局部建模表明，加拿大叶的伸长可能是由于1970年至1999年之间核心流的模式改变引起的，大大削弱了其在地球表面上的特征，从而导致杆子加速向西伯利亚加速。捕获此过程的一系列简单模型表明，在接下来的十年中，北磁极将继续前进到其轨迹进一步前往西伯利亚的390-660公里。
The wandering of Earth's north magnetic pole, the location where the magnetic field points vertically downwards, has long been a topic of scientific fascination. Since the first in-situ measurements in 1831 of its location in the Canadian arctic, the pole has drifted inexorably towards Siberia, accelerating between 1990 and 2005 from its historic speed of 0-15 km/yr to its present speed of 50-60 km/yr. In late October 2017 the north magnetic pole crossed the international date line, passing within 390 km of the geographic pole, and is now moving southwards. Here we show that over the last two decades the position of the north magnetic pole has been largely determined by two large-scale lobes of negative magnetic flux on the core-mantle-boundary under Canada and Siberia. Localised modelling shows that elongation of the Canadian lobe, likely caused by an alteration in the pattern of core-flow between 1970 and 1999, significantly weakened its signature on Earth's surface causing the pole to accelerate towards Siberia. A range of simple models that capture this process indicate that over the next decade the north magnetic pole will continue on its current trajectory travelling a further 390-660 km towards Siberia.
