magnetic variation

简明释义

磁性变化

英英释义

例句

1.Surveyors often need to calculate magnetic variation (磁偏差) to accurately measure land boundaries.

测量员通常需要计算magnetic variation（磁偏差）以准确测量土地边界。

2.In maritime navigation, understanding magnetic variation (磁偏差) is crucial for safe passage.

在海上导航中，理解magnetic variation（磁偏差）对安全通行至关重要。

3.The magnetic variation (磁偏差) can change over time due to shifts in the Earth's magnetic field.

由于地球磁场的变化，magnetic variation（磁偏差）会随时间而变化。

4.Pilots must adjust for magnetic variation (磁偏差) when planning their flight paths.

飞行员在规划航线时必须调整magnetic variation（磁偏差）。

5.When navigating in the wilderness, it's important to account for magnetic variation (磁偏差) to ensure accurate compass readings.

在荒野导航时，考虑到magnetic variation（磁偏差）是确保指南针读数准确的重要因素。

作文

Understanding the concept of magnetic variation is crucial for navigation, especially in the field of aviation and maritime activities. Magnetic variation, also known as magnetic declination, refers to the angle difference between magnetic north and true north at a given location on the Earth's surface. This phenomenon occurs because the Earth's magnetic field does not align perfectly with the geographical poles. As a result, navigators must account for this discrepancy to ensure accurate navigation. The importance of magnetic variation can be illustrated by examining its impact on compass readings. A compass points towards magnetic north, which may differ from true north due to magnetic variation. For instance, if a navigator is in an area where the magnetic variation is 10 degrees east, they must adjust their compass readings accordingly. Failure to do so could lead to significant errors in navigation, potentially resulting in dangerous situations, especially at sea or in the air.To better understand magnetic variation, one must consider the factors that contribute to it. The Earth's magnetic field is generated by the movement of molten iron within its outer core. This dynamic process creates a magnetic field that varies in strength and direction across different regions of the planet. Additionally, geological formations, local magnetic anomalies, and even solar activity can influence the magnetic variation experienced in a specific area. Navigators often refer to charts that indicate magnetic variation values for their region. These charts are updated regularly to reflect changes in the Earth's magnetic field. Understanding how to read and interpret these charts is a vital skill for anyone involved in navigation. For example, pilots must be aware of the magnetic variation when planning their flight paths, as it can affect their course and altitude calculations.In conclusion, magnetic variation is a fundamental concept in navigation that requires careful consideration. By understanding its implications and learning how to compensate for it, navigators can enhance their accuracy and safety while traveling. Whether one is sailing across the ocean or flying high above the clouds, being aware of magnetic variation is essential for successful navigation. As technology continues to evolve, the methods of calculating and compensating for magnetic variation will likely become more sophisticated, but the basic principles will remain the same. Navigators must always respect the intricacies of the Earth's magnetic field and adapt their techniques accordingly to ensure safe and efficient travel.

理解磁偏差这一概念对于导航至关重要，尤其是在航空和海洋活动领域。磁偏差，也称为磁倾角，是指地球表面某一点的磁北与真北之间的角度差。这一现象的发生是因为地球的磁场并不完全与地理极对齐。因此，导航员必须考虑到这一差异，以确保导航的准确性。磁偏差的重要性可以通过考察其对罗盘读数的影响来说明。罗盘指向磁北，而由于磁偏差，这可能与真北存在差异。例如，如果导航员位于一个磁偏差为10度东的区域，他们必须相应地调整罗盘读数。如果不这样做，可能会导致导航中的重大错误，特别是在海上或空中，可能会导致危险情况。要更好地理解磁偏差，必须考虑导致其产生的因素。地球的磁场是由其外核内熔融铁的运动生成的。这一动态过程在地球不同地区产生了强度和方向各异的磁场。此外，地质构造、局部磁异常甚至太阳活动都可能影响特定区域的磁偏差。导航员通常会参考图表，指示他们所在区域的磁偏差值。这些图表会定期更新，以反映地球磁场的变化。了解如何阅读和解释这些图表对任何参与导航的人来说都是一项重要技能。例如，飞行员在规划航线时必须了解磁偏差，因为这可能影响他们的航向和高度计算。总之，磁偏差是导航中的一个基本概念，需要仔细考虑。通过理解其影响并学习如何补偿，导航员可以提高旅行的准确性和安全性。无论是在海洋中航行还是在云层上空飞行，了解磁偏差对于成功导航至关重要。随着技术的不断发展，计算和补偿磁偏差的方法可能会变得更加复杂，但基本原则将保持不变。导航员必须始终尊重地球磁场的复杂性，并相应地调整自己的技术，以确保安全高效的旅行。