magnetic declination

简明释义

磁差;地磁变化

英英释义

例句

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

在使用指南针时，考虑到magnetic declination（磁偏角）是确保导航准确性的关键。

2.The magnetic declination (磁偏角) can vary significantly depending on your location on Earth.

根据您在地球上的位置，magnetic declination（磁偏角）可能会有显著变化。

3.Before heading out on a hiking trip, I always check the magnetic declination (磁偏角) for the area.

在进行远足旅行之前，我总是会检查该地区的magnetic declination（磁偏角）。

4.Pilots must adjust their instruments for magnetic declination (磁偏角) to maintain correct headings.

飞行员必须调整仪器以适应magnetic declination（磁偏角），以保持正确的航向。

5.In some regions, the magnetic declination (磁偏角) can be as much as 20 degrees east or west.

在某些地区，magnetic declination（磁偏角）可能达到20度东或西。

作文

Understanding the concept of magnetic declination is essential for navigation and geography. Magnetic declination refers to the angle between magnetic north, which is the direction a magnetic compass points, and true north, which is the direction along the Earth's surface towards the geographic North Pole. This angle can vary significantly depending on where you are on the Earth's surface. For instance, in some locations, the magnetic declination may be several degrees east or west of true north, while in other areas, it may be almost zero. When navigating using a compass, it is crucial to account for magnetic declination, as failing to do so can lead to significant errors in determining your true heading. Pilots, sailors, and hikers all rely on accurate navigation to reach their destinations safely. Understanding how to adjust for magnetic declination is a vital skill that ensures one does not get lost.The magnetic declination is influenced by various factors, including the Earth's magnetic field, local geological formations, and even human-made structures. The Earth's magnetic field is not uniform; it varies due to the movement of molten iron within the Earth's outer core. This movement creates areas of stronger and weaker magnetic forces, leading to variations in magnetic declination across different regions. Additionally, large metal structures, like skyscrapers or bridges, can distort local magnetic fields, further complicating navigation.To find the magnetic declination for a specific location, one can refer to online resources or consult navigational charts that indicate the current declination values. Many modern GPS devices also take magnetic declination into account, providing users with more accurate positioning information. However, it is still beneficial for navigators to understand the underlying principles of magnetic declination to enhance their skills and confidence in navigation.In summary, magnetic declination is a crucial element of navigation that must be understood and accounted for. It represents the difference between magnetic and true north, and it can vary widely based on geographic location and environmental factors. By learning how to measure and adjust for magnetic declination, individuals can improve their navigation skills and ensure they reach their destinations without getting lost. Whether you are an experienced navigator or just starting, understanding magnetic declination will enhance your ability to travel confidently and accurately.

理解磁偏角的概念对于导航和地理学至关重要。磁偏角是指磁北（即磁罗盘指向的方向）与真北（即沿地球表面指向地理北极的方向）之间的角度。这个角度会根据你在地球表面的具体位置而显著变化。例如，在某些地方，磁偏角可能与真北相差几度，而在其他地区，磁偏角可能几乎为零。在使用罗盘导航时，考虑到磁偏角是至关重要的，因为如果不这样做，可能会导致确定真实航向时出现重大错误。飞行员、船员和徒步旅行者都依赖准确的导航来安全到达目的地。了解如何调整磁偏角是确保你不会迷路的重要技能。磁偏角受多种因素的影响，包括地球的磁场、局部地质构造，甚至人造建筑物。地球的磁场并不均匀；由于地球外核内熔融铁的运动，磁场会发生变化。这种运动形成了强磁力和弱磁力区域，导致不同地区的磁偏角存在差异。此外，大型金属结构，如摩天大楼或桥梁，也会扭曲当地的磁场，从而进一步复杂化导航。要找到特定位置的磁偏角，可以参考在线资源或查阅指示当前偏角值的导航图。许多现代GPS设备也会考虑磁偏角，为用户提供更准确的定位信息。然而，对于导航者来说，了解磁偏角的基本原理仍然是有益的，这将增强他们的技能和信心。总之，磁偏角是导航中的一个关键元素，必须理解和考虑。它代表了磁北与真北之间的差异，并且会根据地理位置和环境因素而广泛变化。通过学习如何测量和调整磁偏角，个人可以提高他们的导航技能，并确保在旅行时不会迷路。无论你是经验丰富的导航者还是刚刚起步，理解磁偏角都将增强你自信和准确的旅行能力。