magnetic declination

简明释义

磁偏

英英释义

例句

1.When using a compass, it's important to account for magnetic declination (磁偏角) to ensure accurate navigation.

使用指南针时，考虑到magnetic declination（磁偏角）是确保导航准确的重要因素。

2.Pilots must adjust their instruments for magnetic declination (磁偏角) when flying over different areas.

飞行员在飞越不同区域时必须调整仪器以考虑magnetic declination（磁偏角）。

3.The magnetic declination (磁偏角) in this region is approximately 10 degrees east.

该地区的magnetic declination（磁偏角）大约是10度东。

4.In orienteering, understanding magnetic declination (磁偏角) can significantly improve your route finding skills.

在定向越野中，理解magnetic declination（磁偏角）可以显著提高你的路线寻找技巧。

5.Geologists often measure magnetic declination (磁偏角) to study the Earth's magnetic field.

地质学家通常测量magnetic declination（磁偏角）以研究地球的磁场。

作文

Understanding the concept of magnetic declination is crucial for navigation and geographical studies. Magnetic declination, also known as magnetic variation, refers to the angle between magnetic north, which is the direction a compass points, and true north, which is the direction along the Earth's surface towards the geographic North Pole. This angle varies depending on where you are on the Earth’s surface, as well as the time of year, due to changes in the Earth’s magnetic field. For navigators, understanding magnetic declination is essential for accurate navigation. When using a compass, if one does not account for magnetic declination, they may end up off course. For instance, if you are in an area where the magnetic declination is 10 degrees east, and your compass indicates north, you must adjust your heading by 10 degrees west to find true north. This adjustment is vital for ensuring that you reach your destination accurately. The magnetic declination can change over time due to shifts in the Earth’s magnetic field. These shifts can be caused by various geological processes, including movements in the Earth's core and changes in the distribution of mass within the Earth. Consequently, it is important for those who rely on compasses—such as hikers, sailors, and pilots—to regularly check updated magnetic declination values for their specific locations. In addition to navigation, magnetic declination plays a significant role in scientific research. Geologists and geophysicists study magnetic declination to better understand the history of the Earth’s magnetic field and its implications for plate tectonics and volcanic activity. By analyzing rock samples and their magnetic declination, scientists can learn about the past positions of the magnetic poles and how they have shifted over time. This research can provide insights into the dynamics of the Earth’s interior and the processes that shape our planet. Furthermore, magnetic declination is also important in the field of archaeology. Archaeologists often use magnetic declination to date artifacts or to understand the orientation of ancient structures. By knowing the magnetic declination at the time when a structure was built, researchers can gain valuable information about the civilization that created it and their navigational techniques. In summary, magnetic declination is a fundamental concept with wide-ranging applications in navigation, scientific research, and archaeology. Understanding magnetic declination allows individuals to navigate more effectively and provides scientists with crucial data for studying the Earth’s history and processes. As technology advances, the methods for measuring and applying magnetic declination will continue to evolve, enhancing our understanding of the world around us. Therefore, whether you are an adventurer relying on a compass or a scientist conducting research, grasping the significance of magnetic declination is indispensable for success in your endeavors.

理解磁偏角的概念对导航和地理研究至关重要。磁偏角，也称为磁变，是指磁北（即指南针指向的方向）与真北（即沿着地球表面指向地理北极的方向）之间的角度。这个角度因你在地球表面的具体位置以及一年中的时间而异，因为地球的磁场会发生变化。对于导航员来说，理解磁偏角对于准确导航至关重要。如果在使用指南针时不考虑磁偏角，可能会导致偏离航线。例如，如果你在一个磁偏角为10度东的地区，而你的指南针指示北方，那么你必须将航向调整10度向西才能找到真北。这种调整对于确保准确到达目的地至关重要。由于地球磁场的变化，磁偏角会随着时间而改变。这些变化可能是由各种地质过程引起的，包括地球核心的运动和地球内部质量分布的变化。因此，依赖指南针的人（如徒步旅行者、航海者和飞行员）需要定期检查他们特定位置的最新磁偏角值。除了导航，磁偏角在科学研究中也发挥着重要作用。地质学家和地球物理学家研究磁偏角以更好地理解地球磁场的历史及其对板块构造和火山活动的影响。通过分析岩石样本及其磁偏角，科学家可以了解磁极的过去位置以及它们如何随时间变化。这项研究可以提供关于地球内部动态及其塑造我们星球过程的见解。此外，磁偏角在考古学领域也很重要。考古学家通常利用磁偏角来给文物定年或了解古代结构的朝向。通过知道某个结构建造时的磁偏角，研究人员可以获得关于创造该结构的文明及其导航技术的宝贵信息。总之，磁偏角是一个基本概念，在导航、科学研究和考古学中具有广泛的应用。理解磁偏角使个人能够更有效地导航，并为科学家提供了研究地球历史和过程的重要数据。随着技术的发展，测量和应用磁偏角的方法将继续演变，从而增强我们对周围世界的理解。因此，无论你是依赖指南针的冒险者，还是进行研究的科学家，掌握磁偏角的重要性对于在各自的努力中取得成功都是不可或缺的。