active layer

简明释义

1. 活动层; 2. 融冻层; 3. 年融层; 4. 活性层; 5. 活土层; 6. 作用层;

英英释义

例句

1.The active layer plays a vital role in the ecosystem by supporting vegetation growth.

该活层在生态系统中起着重要作用，支持植被生长。

2.The environmental scientists studied the effects of climate change on the active layer of permafrost.

环境科学家研究了气候变化对永久冻土的活层的影响。

3.The active layer in this region experiences significant seasonal changes.

该地区的活层经历显著的季节变化。

4.Researchers measured the thickness of the active layer to assess its impact on local hydrology.

研究人员测量了活层的厚度，以评估其对当地水文的影响。

5.In geotechnical engineering, understanding the properties of the active layer is crucial for foundation design.

在岩土工程中，了解活层的性质对基础设计至关重要。

作文

The concept of the active layer is essential in various scientific fields, particularly in geology and environmental science. The active layer refers to the top layer of soil or sediment that undergoes significant changes due to seasonal variations in temperature and moisture. This layer is crucial for understanding the dynamics of ecosystems, especially in permafrost regions where it thaws during the warmer months. As temperatures rise globally, the behavior of the active layer becomes increasingly important in predicting the impacts of climate change on local environments.In permafrost areas, the active layer can vary in depth, depending on the climate and geographical conditions. During the summer, the active layer thaws, allowing plants to grow and microorganisms to thrive. However, as winter approaches, this layer freezes again, creating a cycle that affects the entire ecosystem. The thawing of the active layer releases greenhouse gases like methane and carbon dioxide, which have significant implications for global warming. Understanding the processes within the active layer is critical for scientists who study climate change and its effects on our planet.Moreover, the active layer plays a vital role in hydrology. It influences how water moves through the soil and affects groundwater recharge. When the active layer thaws, it can lead to increased runoff and erosion, impacting local waterways and ecosystems. This has implications for agriculture, as farmers must consider how changes in the active layer can affect crop yields and soil health. By studying the active layer, researchers can develop better strategies for managing land and water resources.In urban planning, understanding the active layer is also essential. Construction projects in areas with permafrost must account for the stability of the active layer. If the layer thaws unexpectedly, it can lead to ground subsidence, damaging infrastructure and posing safety risks. Engineers and planners need to consider the characteristics of the active layer when designing buildings and roads in these regions.In conclusion, the active layer is a dynamic and critical component of our environment. Its influence extends beyond just the physical properties of the soil; it affects ecosystems, climate change, hydrology, and urban development. As we face the challenges of a changing climate, understanding the active layer will be crucial for developing effective strategies to mitigate its impacts. Scientists and policymakers must work together to monitor changes in the active layer and adapt our practices to ensure a sustainable future for our planet.

“活层”这一概念在多个科学领域中至关重要，特别是在地质学和环境科学中。“活层”指的是由于温度和湿度的季节性变化而经历显著变化的土壤或沉积物的顶层。这一层对于理解生态系统的动态至关重要，尤其是在永久冻土地区，在温暖的月份会融化。随着全球气温的上升，“活层”的行为在预测气候变化对当地环境影响时变得愈发重要。在永久冻土区域，“活层”的深度可能因气候和地理条件而异。在夏季，“活层”融化，植物得以生长，微生物繁衍。然而，随着冬天的临近，这一层又会重新冻结，形成一个影响整个生态系统的循环。“活层”的融化会释放出甲烷和二氧化碳等温室气体，这对全球变暖具有重要影响。理解“活层”内部的过程对研究气候变化及其对我们星球影响的科学家至关重要。此外，“活层”在水文学中也发挥着重要作用。它影响水在土壤中的流动，并影响地下水的补给。当“活层”融化时，可能导致径流和侵蚀增加，影响当地水道和生态系统。这对农业有影响，因为农民必须考虑“活层”的变化如何影响作物产量和土壤健康。通过研究“活层”，研究人员可以制定更好的土地和水资源管理策略。在城市规划中，了解“活层”也至关重要。在永久冻土地区的建设项目必须考虑“活层”的稳定性。如果这一层意外融化，可能导致地面下沉，损坏基础设施并构成安全风险。工程师和规划者需要在设计建筑和道路时考虑“活层”的特性。总之，“活层”是我们环境中一个动态且关键的组成部分。它的影响不仅限于土壤的物理属性；它还影响生态系统、气候变化、水文学和城市发展。随着我们面临气候变化带来的挑战，理解“活层”对于制定有效的应对策略至关重要。科学家和政策制定者必须共同努力，监测“活层”的变化，并调整我们的实践，以确保我们星球的可持续未来。