这些成分的相对大小随季节而变，场的变幅有特定的纬度分布。

The relative magnitudes of these components change with season and their amplitudes have definite latitudinal distributions.

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本文用云南天文台黑子目视观测资料，作出了黑子的纬度分布图。

A latitude distribution of sunspot groups is given by using the data of the visual sunspot observations made at the Yunnan Observatory.

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利用第10代国际参考地磁场模型(IGRF)的资料，研究了地磁位的谐波振幅的纬度分布及其时间变化。

Using the 10th International geomagnetic Reference Field (IGRF) models, the latitudinal distribution of harmonic amplitude and its time-variation of geomagnetic potential are investigated.

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