annual change of magnetic variation

简明释义

磁差年变化

英英释义

例句

1.Marine charts include details about the annual change of magnetic variation for safe navigation.

海洋图表包含关于磁偏角的年度变化的详细信息，以确保安全导航。

2.Navigators must account for the annual change of magnetic variation to ensure accurate course plotting.

导航员必须考虑磁偏角的年度变化以确保航向规划的准确性。

3.The annual change of magnetic variation affects how compasses point, especially in remote areas.

磁偏角的年度变化影响指南针的指向，尤其是在偏远地区。

4.Pilots receive training on how to adjust for the annual change of magnetic variation during their flying lessons.

飞行员在飞行课程中接受如何调整磁偏角的年度变化的培训。

5.Weather balloons are released at specific times to measure the annual change of magnetic variation in the atmosphere.

气象气球在特定时间释放，以测量大气中的磁偏角的年度变化。

作文

The Earth is a dynamic planet, constantly changing over time. One of the fascinating aspects of this dynamism is the Earth's magnetic field, which is not only crucial for navigation but also for understanding the geological and environmental processes that shape our planet. A significant aspect of the Earth's magnetic field is the annual change of magnetic variation, which refers to the gradual shift in the magnetic declination observed each year. This phenomenon plays a vital role in navigation, particularly for those who rely on compasses and other magnetic instruments.To begin with, it is essential to understand what magnetic variation is. Magnetic variation, or magnetic declination, is the angle between magnetic north and true north. It varies depending on where you are on the Earth's surface and changes over time due to the movement of molten iron within the Earth's outer core, which generates the magnetic field. The annual change of magnetic variation reflects how this angle shifts from year to year, influenced by various geological and solar activities.For navigators, sailors, and aviators, understanding the annual change of magnetic variation is crucial. As they plot their courses, they must account for the current magnetic declination to ensure accurate navigation. Failure to do so can result in significant errors, potentially leading to dangerous situations at sea or in the air. Therefore, many organizations, such as the National Oceanic and Atmospheric Administration (NOAA) and the International Association of Geomagnetism and Aeronomy, provide updated magnetic declination maps that include the annual change of magnetic variation.Moreover, the annual change of magnetic variation is not uniform across the globe. Different regions experience varying rates of change due to local geological features and the complex nature of the Earth's magnetic field. For instance, areas near the poles may encounter more dramatic shifts compared to equatorial regions. This variability necessitates continuous monitoring and research to keep navigational charts accurate and up-to-date.In addition to its importance in navigation, the annual change of magnetic variation has implications for scientific research. Geophysicists study these changes to gain insights into the Earth's interior dynamics and the behavior of the magnetic field over time. By analyzing historical data on magnetic variation, scientists can better understand past geophysical events, such as geomagnetic reversals, and predict future changes in the magnetic field.Furthermore, the annual change of magnetic variation is also relevant in the context of climate change and environmental monitoring. Changes in the magnetic field can influence atmospheric conditions and even affect satellite communications. Understanding these variations helps researchers assess the potential impacts of climate change on both the environment and technology.In conclusion, the annual change of magnetic variation is a critical aspect of Earth's magnetic field that has significant implications for navigation, scientific research, and environmental monitoring. As we continue to explore and understand our planet, recognizing and adapting to these changes will be essential for ensuring safe travel and advancing our knowledge of the Earth’s complex systems. The ongoing study of the annual change of magnetic variation will undoubtedly provide valuable insights into the intricate relationship between the Earth's magnetic field and the various processes that shape our world.

地球是一个动态的星球，随着时间的推移不断变化。这个动态性中一个引人入胜的方面是地球的磁场，它不仅对导航至关重要，还帮助我们理解塑造我们星球的地质和环境过程。地球磁场的一个重要方面是磁偏差的年度变化，这指的是每年观察到的磁偏角的逐渐变化。这种现象在导航中发挥着重要作用，特别是对于那些依赖指南针和其他磁性仪器的人来说。首先，有必要理解什么是磁偏差。磁偏差或磁偏角是磁北极与真北极之间的角度。它取决于你在地球表面的具体位置，并且由于地球外核内的熔融铁运动而随时间变化，这种运动产生了磁场。磁偏差的年度变化反映了这一角度每年如何变化，受各种地质和太阳活动的影响。对于导航员、海员和飞行员来说，了解磁偏差的年度变化至关重要。当他们规划航线时，必须考虑当前的磁偏差，以确保导航的准确性。如果不这样做，可能会导致重大错误，从而在海上或空中造成危险。因此，许多组织，如国家海洋和大气管理局（NOAA）和国际地磁与气候学协会，提供更新的磁偏差地图，其中包括磁偏差的年度变化。此外，磁偏差的年度变化在全球范围内并不均匀。不同地区由于局部地质特征和地球磁场的复杂性，经历不同的变化率。例如，靠近极地的地区可能会遇到比赤道地区更剧烈的变化。这种变异性需要持续监测和研究，以保持导航图的准确性和时效性。除了在导航中的重要性外，磁偏差的年度变化还对科学研究具有重要意义。地球物理学家研究这些变化，以深入了解地球内部的动态以及磁场随时间的变化。通过分析历史磁偏差数据，科学家可以更好地理解过去的地球物理事件，例如地磁反转，并预测未来磁场的变化。此外，磁偏差的年度变化在气候变化和环境监测的背景下也具有相关性。磁场的变化可能会影响大气条件，甚至影响卫星通信。理解这些变化有助于研究人员评估气候变化对环境和技术的潜在影响。总之，磁偏差的年度变化是地球磁场的一个关键方面，对导航、科学研究和环境监测具有重要意义。随着我们继续探索和理解我们的星球，认识和适应这些变化将对确保安全旅行和推进我们对地球复杂系统的知识至关重要。对磁偏差的年度变化的持续研究无疑将为我们提供宝贵的见解，帮助我们理解地球磁场与塑造我们世界的各种过程之间的复杂关系。