magnetic variation

简明释义

磁差;磁变化

英英释义

例句

1.The map indicated a magnetic variation 磁偏差 of 10 degrees east.

地图显示东部有10度的磁偏差。

2.Using GPS can help mitigate the effects of magnetic variation 磁偏差.

使用GPS可以帮助减轻磁偏差的影响。

3.The sailor adjusted his compass to account for the magnetic variation 磁偏差 in the area.

水手调整了他的指南针，以考虑该地区的磁偏差。

4.Pilots must be aware of the magnetic variation 磁偏差 when navigating at high altitudes.

飞行员在高空导航时必须注意磁偏差。

5.In some regions, the magnetic variation 磁偏差 can change significantly over time.

在某些地区，磁偏差可能会随时间显著变化。

作文

Understanding the concept of magnetic variation is crucial for navigators, pilots, and anyone who relies on compass-based navigation. Magnetic variation, also known as magnetic declination, refers to the angle between magnetic north and true north. This discrepancy arises because the Earth's magnetic field is not perfectly aligned with its rotational axis. The importance of recognizing magnetic variation cannot be overstated, especially in regions where this angle changes significantly. In practical terms, when a navigator uses a compass, they are aligning their direction based on magnetic north. However, if they do not account for magnetic variation, their actual path may deviate from their intended course. For instance, in some areas, magnetic variation can be as much as 20 degrees east or west. This means that if a sailor sets a course heading of 90 degrees (east) without adjusting for magnetic variation, they could end up veering off course significantly, leading to potential hazards or miscalculations.The magnetic variation is not static; it changes over time due to the dynamic nature of the Earth's magnetic field. Maps that show magnetic variation are updated regularly to reflect these changes. Therefore, it is essential for navigators to refer to the latest charts and data to ensure accurate navigation. GPS technology has also made significant strides in reducing reliance on traditional compasses, but understanding magnetic variation remains an essential skill, particularly in remote areas where GPS signals may be weak or unavailable.Moreover, the study of magnetic variation offers insights into geological processes. Variations in the Earth's magnetic field can indicate the presence of mineral deposits, which can be valuable for mining industries. Geologists often use magnetometers to measure magnetic variation in specific areas to identify potential resources beneath the surface.In conclusion, magnetic variation is a fundamental concept in navigation and geology. Understanding its implications is vital for ensuring safe travel and exploration. As technology continues to advance, the principles surrounding magnetic variation will remain relevant, reminding us of the complexities of our planet's magnetic landscape and the importance of precise navigation. Whether one is sailing across the ocean, hiking in the mountains, or conducting geological surveys, being aware of magnetic variation is essential for achieving accurate results and maintaining safety.

理解磁偏角这一概念对导航员、飞行员以及任何依赖于指南针导航的人来说都是至关重要的。磁偏角，也称为磁倾斜，指的是磁北和真北之间的角度差异。这种差异产生的原因是地球的磁场并没有与其自转轴完美对齐。认识到磁偏角的重要性不容小觑，尤其是在这个角度变化显著的地区。在实际操作中，当导航员使用指南针时，他们是根据磁北来调整方向。然而，如果他们不考虑磁偏角，那么他们的实际航向可能会偏离预定路线。例如，在某些地区，磁偏角可能达到20度的东或西。这意味着如果一名水手设定了90度（东）的航向而没有调整磁偏角，他们可能会大幅偏离航线，从而导致潜在的危险或计算错误。磁偏角并不是静态的；由于地球磁场的动态特性，它会随时间而变化。显示磁偏角的地图会定期更新，以反映这些变化。因此，导航员必须参考最新的图表和数据，以确保准确的导航。GPS技术也在减少对传统指南针的依赖方面取得了重大进展，但理解磁偏角仍然是一项基本技能，特别是在GPS信号可能微弱或不可用的偏远地区。此外，对磁偏角的研究提供了对地质过程的深入了解。地球磁场的变化可以指示矿物沉积的存在，这对采矿行业具有重要价值。地质学家通常使用磁力仪测量特定区域的磁偏角，以识别地下潜在资源。总之，磁偏角是导航和地质学中的一个基本概念。理解其影响对于确保安全旅行和探索至关重要。随着技术的不断进步，围绕磁偏角的原则将继续保持相关性，提醒我们地球磁场的复杂性及精准导航的重要性。无论是在海洋航行、山区徒步旅行还是进行地质勘测，意识到磁偏角对实现准确结果和维护安全至关重要。