magnetic variation

简明释义

磁差

英英释义

例句

1.Navigators must account for magnetic variation when plotting their courses to ensure accuracy.

导航员在绘制航线时必须考虑磁偏角以确保准确性。

2.The magnetic variation in this region can lead to significant navigation errors if not corrected.

该地区的磁偏角如果不进行修正，可能会导致显著的导航错误。

3.Before setting sail, sailors should check the local magnetic variation to adjust their compasses.

在起航前，水手应检查当地的磁偏角以调整他们的罗盘。

4.In mountainous areas, magnetic variation can be affected by geological formations.

在山区，磁偏角可能会受到地质构造的影响。

5.The pilot used the magnetic variation chart to ensure the flight path was accurate.

飞行员使用磁偏角图表以确保飞行路径的准确性。

作文

Understanding the concept of magnetic variation is essential for navigation and geography. Magnetic variation, also known as declination, refers to the angle between magnetic north and true north. This difference arises because the Earth's magnetic field does not align perfectly with the geographic poles. Navigators, whether they are at sea or on land, must take this variation into account when using compasses. Failing to do so can lead to significant errors in navigation, potentially resulting in being off course by several degrees over long distances.The measurement of magnetic variation can change based on geographic location and time. For instance, a compass may point slightly east or west of true north depending on where you are on the globe. This is why maps often include information about magnetic variation, indicating how much a navigator needs to adjust their compass readings. Understanding this concept is crucial for sailors who rely on accurate navigation methods to traverse vast oceans.In addition to its importance in navigation, magnetic variation plays a role in various scientific studies. Geophysicists, for example, study the Earth’s magnetic field to understand its dynamics and changes over time. These studies can reveal insights into the Earth’s core and its movements, which can have implications for understanding geological phenomena such as earthquakes and volcanic activity. By analyzing magnetic variation, scientists can also monitor changes in the Earth's magnetic field that may affect satellite operations and other technologies reliant on precise positioning.Moreover, magnetic variation is not a static measurement; it evolves due to the shifting nature of the Earth's magnetic field. This phenomenon is influenced by solar activity, tectonic movements, and other natural occurrences. As a result, navigators must regularly update their knowledge of magnetic variation in their area to ensure safe and accurate travel.In conclusion, the significance of magnetic variation extends beyond simple navigation. It encompasses a wide range of applications in science, technology, and safety. For anyone involved in travel, exploration, or research, understanding magnetic variation is vital. Whether you are sailing across the ocean, hiking in remote areas, or conducting scientific research, being aware of this phenomenon can enhance your ability to navigate the world accurately and effectively.

理解磁偏角的概念对于导航和地理学至关重要。磁偏角，也称为偏角，指的是磁北与真北之间的角度差。这种差异的产生是因为地球的磁场并不与地理极点完全对齐。无论是在海上还是在陆地上，导航员都必须考虑这一变化，以便使用指南针。如果不这样做，可能会导致导航出现重大错误，从而在长距离行驶中偏离数度。磁偏角的测量会根据地理位置和时间而变化。例如，指南针可能会根据你在地球上的位置稍微指向真北的东或西。这就是为什么地图通常包含有关磁偏角的信息，指示导航员需要如何调整他们的指南针读数。理解这一概念对依赖准确导航方法穿越广阔海洋的水手至关重要。除了在导航中的重要性外，磁偏角还在各种科学研究中发挥作用。例如，地球物理学家研究地球的磁场以了解其动态和随时间的变化。这些研究可以揭示有关地球核心及其运动的见解，这可能对理解地质现象如地震和火山活动有影响。通过分析磁偏角，科学家们还可以监测地球磁场的变化，这可能会影响依赖精确定位的卫星操作和其他技术。此外，磁偏角不是一个静态的测量值；它因地球磁场的移动而演变。这种现象受到太阳活动、构造运动和其他自然事件的影响。因此，导航员必须定期更新他们对所在地区磁偏角的知识，以确保安全和准确的旅行。总之，磁偏角的重要性超出了简单导航的范围。它涵盖了科学、技术和安全等广泛的应用。对于任何参与旅行、探索或研究的人来说，理解磁偏角都是至关重要的。无论你是在横渡海洋、在偏远地区徒步旅行，还是进行科学研究，了解这一现象都能增强你准确有效地导航世界的能力。