secular variation

简明释义

经年变化

英英释义

例句

1.The secular variation 世俗变化 of the Earth's magnetic field can affect navigation systems.

地球磁场的secular variation 世俗变化可能影响导航系统.

2.The study of magnetic fields on Earth reveals significant secular variation 世俗变化 over the past century.

对地球磁场的研究揭示了过去一个世纪显著的secular variation 世俗变化.

3.Scientists monitor secular variation 世俗变化 in climate patterns to understand long-term trends.

科学家监测气候模式中的secular variation 世俗变化以理解长期趋势.

4.Researchers are investigating the secular variation 世俗变化 in sea level rise due to climate change.

研究人员正在调查由于气候变化导致的海平面上升的secular variation 世俗变化.

5.In geology, secular variation 世俗变化 helps explain the changes in rock formations over millennia.

在地质学中，secular variation 世俗变化有助于解释岩石形成在千年间的变化.

作文

In the study of geophysics, the term secular variation refers to the long-term changes in the Earth's magnetic field. These variations can occur over periods ranging from decades to millions of years and are distinct from shorter-term fluctuations caused by solar activity or other transient phenomena. Understanding secular variation is crucial for several reasons, including navigation, understanding the Earth's interior, and studying past climates. The Earth's magnetic field is generated by the movement of molten iron in its outer core. This process is dynamic and complex, leading to gradual changes in the strength and direction of the magnetic field over time. For instance, historical records indicate that the magnetic poles have shifted significantly, with the north magnetic pole currently moving at an accelerated rate. These shifts are a prime example of secular variation, demonstrating how the Earth's magnetic environment is not static but rather continuously evolving.Geologists and archaeologists rely on the concept of secular variation when dating artifacts and understanding human history. By examining the magnetic properties of ancient materials, researchers can infer the position of the magnetic poles at various points in time, which aids in constructing a timeline of human activity and environmental changes. This application of secular variation highlights its importance beyond just geophysical studies; it intertwines with our understanding of human civilization and its development.Moreover, secular variation has implications for modern technology. Many navigation systems, including those used in aviation and maritime travel, depend on accurate magnetic readings. As the magnetic field changes over time, recalibrating these systems becomes essential to ensure safety and accuracy. The ongoing monitoring of secular variation allows scientists to provide updated information that can be integrated into navigational tools, ensuring they remain reliable amidst changing magnetic conditions.In addition to navigation, secular variation plays a role in understanding climate change. The Earth's magnetic field influences atmospheric processes, which can affect weather patterns and climate. By studying historical secular variation, scientists can gain insights into how the Earth's climate has responded to changes in the magnetic field over geological timescales. This information is vital for predicting future climate scenarios and understanding the interplay between geological and atmospheric systems.In conclusion, the concept of secular variation encompasses a wide range of scientific disciplines, from geophysics to archaeology and climate science. Its significance lies in the long-term changes it represents, which help us understand not only the Earth's magnetic field but also the broader implications for navigation, human history, and climate dynamics. As research continues, the study of secular variation will undoubtedly yield further insights into the complex and ever-changing nature of our planet, reinforcing the idea that nothing in nature is truly constant. Overall, grasping the concept of secular variation is essential for anyone interested in the Earth sciences and its interconnected systems. It serves as a reminder of the dynamic processes that shape our world and the importance of continuous observation and adaptation in both scientific research and everyday life.

在地球物理学研究中，术语secular variation指的是地球磁场的长期变化。这些变化可能发生在几十年到数百万年的时间范围内，与由太阳活动或其他瞬态现象引起的短期波动不同。理解secular variation至关重要，原因有很多，包括导航、理解地球内部和研究过去的气候。地球的磁场是由外核中熔融铁的运动产生的。这个过程是动态和复杂的，导致磁场强度和方向随时间的逐渐变化。例如，历史记录表明，磁极已经发生了显著的移动，目前北磁极正在加速移动。这些移动是secular variation的一个主要例子，展示了地球的磁环境并非静态，而是不断演变的。地质学家和考古学家在给文物定年和理解人类历史时依赖于secular variation的概念。通过检查古代材料的磁性特征，研究人员可以推断出不同时间点磁极的位置，这有助于构建人类活动和环境变化的时间线。对secular variation的这种应用突显了它在地球物理研究之外的重要性；它与我们对人类文明及其发展的理解交织在一起。此外，secular variation对现代技术也有影响。许多导航系统，包括航空和海洋旅行中使用的系统，依赖于准确的磁场读数。随着磁场随时间变化，重新校准这些系统变得至关重要，以确保安全和准确。对secular variation的持续监测使科学家能够提供更新的信息，可以集成到导航工具中，确保它们在变化的磁条件下保持可靠。除了导航，secular variation在理解气候变化方面也发挥着作用。地球的磁场影响大气过程，这会影响天气模式和气候。通过研究历史上的secular variation，科学家可以获得有关地球气候如何响应磁场变化的地质时间尺度的信息。这些信息对于预测未来气候情景和理解地质与大气系统之间的相互作用至关重要。总之，secular variation的概念涵盖了广泛的科学学科，从地球物理学到考古学和气候科学。其重要性在于它所代表的长期变化，这有助于我们理解不仅是地球的磁场，还有导航、人类历史和气候动态的更广泛影响。随着研究的继续，secular variation的研究无疑会为我们提供进一步的洞察，揭示塑造我们星球的复杂而不断变化的自然过程，强调在科学研究和日常生活中不断观察和适应的重要性。总体而言，掌握secular variation的概念对于任何对地球科学及其相互联系的系统感兴趣的人来说都是必不可少的。它提醒我们自然界动态过程的存在，以及在不断变化的世界中持续观察和适应的重要性。