地磁场长期变化

华北地区地磁场长期变化的地区差异

Regional difference for the secular variation of geomagnetic field in North China area

1900&2000年亚洲地磁场长期变化

Geomagnetic secular variation over Asia for 1900-2000

地磁场长期变化速率的30年周期

Thirty-year period in secular variation rate of the main geomagnetic field

2000年中国地区地磁场长期变化的区域特征

Regional features of the secular variation of the geomagnetic field in China for 2000

研究表明，中国的地磁场长期变化是一包罗大小不同周期变化的复合运动。

The results showed that the long-term variation of the geomagnetic field in Chian in a composite activity including different cycles of variation big and small .

使用超导磁力仪对石笋进行高精度、高密度的连续测定，获得了桂林地区如下古地磁场长期变化研究结果。1.8500aB.P。

A successive study of stalagmite have been made by using SQUID magnetometer with high precision and density , obtaining an expected result of the long-term variation of paleomagnetic field .

本文作者采取国际上近年新兴起的新方法&洞穴次生化学沉积物的古地磁法，首次进行了中国广西地区的地磁场长期变化的研究。

The authors have carried our for the first time a research on long-term variation of the geomagnetic field in Guangxi China by using paleomagnetism of speleothems ( secondary deposits in limestone caves ), which is a new method used in the world in recent years .

用曲面Spline方法表示1900～1936年中国（部分地区）地磁场及其长期变化的分布

Distributions of the geomagnetic field and its secular variations expressed by the surface Spline method in China ( a part ) for 1900 ~ 1936

1900～2000年地磁场及长期变化的空间功率谱分析

The Spatial Power Spectrum of the Geomagnetic Field and Secular Variation for 1900 & 2000

地震和活动断层的电磁前兆与标志及地磁场的长期变化

Electromagnetic Precursors of Earthquakes and Signs of Active Faults and Studies on Long-Period Changes in Geomagnetism

2000年中国地磁场及其长期变化冠谐分析

Spherical cap harmonic analysis of the geomagnetic field and its secular variation in China for 2000

在利用测高仪观测分析电离层的长期变化趋势时，发现单纯的温室效应并不能造成这么大的变化，因此我们提出了地磁场的长期变化可能会造成电离层的长期变化。

When analyzing the ionospheric long term trends from ionosonde observations , we found that just greenhouse effect is insufficient . We suggest that the long term variations of geomagnetic field may be another origin .

华北地区地磁场Z分量长期变化的拟合与预测

Fitting and prediction of secular geomagnetic Z component variations in North China

国际参考地磁场模型中高阶球谐项对地磁场长期变化的影响

Effect of high-degree harmonics in the IGRF models on secular variation of the geomagnetic field